Faculty Profiles - KODAMA Naoto

写真a

KODAMA Naoto

Organization

Graduate School of Engineering Electrical Engineering 1 Assistant Professor

Graduate School

Graduate School of Engineering

Undergraduate School

School of Engineering Electrical Engineering, Electronics, and Information Engineering

Degree 1

博士(工学) （ 2018.3 金沢大学）

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Research Interests 3

熱プラズマ
遮断器
プラズマ診断

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Research Areas 3

Manufacturing Technology (Mechanical Engineering, Electrical and Electronic Engineering, Chemical Engineering) / Power engineering
Energy Engineering / Fundamental plasma
Energy Engineering / Applied plasma science

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Current Research Project and SDGs 2

直流遮断用小型・高遮断容量ヒューズの開発
電力器機用絶縁・消弧ガスの輸送・熱力学・耐電界特性の解析

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Research History 2

名古屋大学　大学院工学研究科電気工学専攻助教

2018.4

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Country：Japan
Japan Society for Promotion of Science

2015.4 - 2018.3

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Country：Japan

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Education 2

Kanazawa University

2015.4 - 2018.3

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Country： Japan
Kanazawa University

2013.4 - 2015.3

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Country： Japan

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Professional Memberships 2

電気学会会員

2012.8
応用物理学会会員

2012.8

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Committee Memberships 7

ISPlasma2024/IC-PLANTS2024現地実行委員会 ISPlasma2023/IC-PLANTS2023現地実行委員会

2023.4 - 2024.3

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Committee type：Other
令和4・5年度電気学会東海支部活動推進員

2022.4 - 2024.3
ISPlasma2023/IC-PLANTS2023現地実行委員会 ISPlasma2023/IC-PLANTS2023現地実行委員会

2022.4 - 2023.3

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Committee type：Academic society
ISPlasma2022/IC-PLANTS2022現地実行委員会 ISPlasma2022/IC-PLANTS2022現地実行委員会

2021.4 - 2022.3
IUMRS-ICYRAM 2022 Contributed Symposium Organizers

2021 - 2023.8

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https://83aa8a6b-10b5-4864-90ac-2dfd3fd317bd.filesusr.com/ugd/e971a2_dbd09c63f1814a9c8d98cf0005613543.pdf
応用物理学会プラズマエレクトロニクス分科会幹事幹事

2019.4 - 2021.3
ISPlasma2020/IC-PLANTS2020実行委員会実行委員

2019

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Committee type：Academic society

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Awards 12

パワーアカデミー萌芽研究優秀賞

2022.3 パワーアカデミー

兒玉直人

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Award type：Award from Japanese society, conference, symposium, etc. Country：Japan
電気学会開閉保護研究発表賞

2022.1 電気学会開閉保護技術委員会珪砂を用いた直流アーク消弧過程で生じる高温ガスの特性

兒玉直人

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Award type：Award from Japanese society, conference, symposium, etc. Country：Japan
電気学会優秀論文発表賞(基礎・材料・共通部門)

2020.9 電気学会珪砂中への円筒設置時における直流アーク温度の測定とアーク電圧上昇機構の検討

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Award type：Award from Japanese society, conference, symposium, etc. Country：Japan
電気学会優秀論文発表賞

2019.3 電気学会 Installation of PA66, PMMA or Si-resin Cylinders in Silica-Sand for Rising Arc Voltage during DC Interruption

兒玉直人

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Award type：Award from international society, conference, symposium, etc. Country：Japan
電気学会優秀論文発表賞

2019.1 電気学会東海支部珪砂中へのPA66，PMMAおよびSi樹脂設置による直流アーク遮断時間の短縮-原子価エンタルピーからの解釈-

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Award type：Award from Japanese society, conference, symposium, etc.
電気学会優秀論文発表賞(基礎・材料・共通部門)

2018.9 電気学会 Ar誘導熱プラズマへのTi原料供給時における熱プラズマトーチ内の導電率の二次元分布推定

兒玉直人，石坂洋輔，清水光太郎，田中康規，上杉喜彦，石島達夫，末安志織，渡邉周，中村圭太郎

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Award type：Award from Japanese society, conference, symposium, etc. Country：Japan
Oral presentation award of APSPT-10

2017.12 APSPT-10 Estimation of Ti excitation temperature and power density distribution in the Ar induction thermal plasma during Ti feedstock injection

N. Kodama, Y. Ishisaka, K. Shimizu, Y. Tanaka, Y. Uesugi, T. Ishijima, S. Sueyasu, S. Watanabe, K. Nakamura

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Award type：International academic award (Japan or overseas) Country：China
応用物理学会講演奨励賞

2017.9 応用物理学会 Ar誘導熱プラズマへのTi原料供給時におけるトーチ内のTi励起温度およびTi蒸気混入率の二次元分布の推定

兒玉直人，石坂洋輔，清水光太郎，田中康規，上杉喜彦，石島達夫，末安志織，渡邉周，中村圭太郎

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Award type：Award from Japanese society, conference, symposium, etc. Country：Japan
応用物理学会講演奨励賞

2017.9 応用物理学会 Ar誘導熱プラズマへのTi原料供給時におけるトーチ内のTi励起温度およびTi蒸気混入率の二次元分布の推定

兒玉直人, 石坂洋輔, 清水光太郎, 田中康規, 上杉喜彦, 石島達夫, 末安志織, 渡邉周, 中村圭太郎

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Award type：Award from international society, conference, symposium, etc. Country：Japan
第15回プラズマエレクトロニクス賞

2017.3 応用物理学会プラズマエレクトロニクス分科会

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Country：Japan
電気学会優秀論文発表賞(基礎・材料・共通部門)

2016.9 電気学会熱プラズマによるTiO#D2#DRナノ粒子生成中のTi原子およびTiO分子生成過程の分光学的検討

兒玉直人，北健太郎，田中康規，上杉喜彦，石島達夫，末安志織，中村圭太郎

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Award type：Award from Japanese society, conference, symposium, etc. Country：Japan
電気学会優秀論文発表賞

2014.9 電気学会 Ar-O#D2#DR変調誘導熱プラズマを用いたAl-doped TiO#D2#DRナノ粒子の大量生成時におけるクエンチングガス導入効果

兒玉直人，郭韋萱，田中康規，上杉喜彦，石島達夫，渡邊周，中村圭太郎

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Award type：Award from Japanese society, conference, symposium, etc. Country：Japan

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Papers 43

量子化学計算を併用した高温消弧ガス特性の解析 Invited

兒玉直人・横水康伸

令和5年電気学会全国大会講演論文集 2023.3

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Authorship：Lead author,　Corresponding author Language：Japanese Publishing type：Research paper (bulletin of university, research institution)
Analysis of Arc Characteristics for Improvement of Power Protection Device Performance

Kodama N.

Proceeding - ELTICOM 2022: 6th International Conference on Electrical, Telecommunication and Computer Engineering 2022 page： 14 - 17 2023.2

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Publisher：Proceeding - ELTICOM 2022: 6th International Conference on Electrical, Telecommunication and Computer Engineering 2022

Power protection devices such as gas circuit breaker and current limiting fuse are key component for safety usage of electric system. During fault current breaking process high temperature arc can be formed inside these devices. The arc breaking is neccessary to achieve current interruption. High temperature gas properties of arc is very important factor to simulate the arc breaking process and to design the protection device. This paper briefly introduces calculation procedure of gas properties and discuss the importance of gas property analysis using the arc inside the limiting fuse as typical example. In addition, it is also introduced the relationship between gas property analysis and the quentum chemical calculation as recent trends.

DOI： 10.1109/ELTICOM57747.2022.10038272

Scopus
Theoretical calculation of current commutation process and residual current during contact sliding movement - Application of High Resistivity Material to Fixed Contact Rear Part-

Hiroumi Kawabata, Yasunobu Yokomizu, Naoto Kodama, Kanta Watanabe, Fukutsuka Takashi

Proceeding of 13th International Workshop on High Voltage Engineering(IWHV2022) 2022.11

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Language：English Publishing type：Research paper (international conference proceedings)
DC Arc Column Resistance Rise with Silicone Resin Painted on Copper Fuse-Element in Silica-sand Filling Space

Waku Takenaka, Naoto Kodama, Kaito Hasegawa, Yasunobu Yokomizu, Hironori Shimizu

Proceeding of 13th International Workshop on High Voltage Engineering(IWHV2022) 2022.11

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Authorship：Corresponding author Language：English Publishing type：Research paper (international conference proceedings)
Simplified analysis of short-circuit current for hybrid AC/DC delivery system

Mir Sayed Shah Danish, Mikimasa Iwata, Yasunobu Yokomizu, Naoto Kodama

Proceeding of 13th International Workshop on High Voltage Engineering(IWHV2022) 2022.11

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Language：English Publishing type：Research paper (international conference proceedings)
Reaction Products in SF6 Multi Mixture with C2F4-BN and Cu Vapor Decomposition at 300-3000 K: Approach to Dielectric Breakdown Property Evaluation

YOKOMIZU Yasunobu, KODAMA Naoto, URAI Hajime, TERADA Masanao, KURODA Mami

Proceeding of 13th International Workshop on High Voltage Engineering(IWHV2022) 2022.11

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Authorship：Corresponding author Language：English Publishing type：Research paper (international conference proceedings)
Experiment on DC Arc Quenching using Ablation of Polymer Narrow-Section Arranged around Fuse Element

Kodama Naoto, Yokomizu Yasunobu, Takenaka Waku, Nakamura Kanata, Tozaki Shinsuke, Iwata Mikimasa, Danish M. S. S.

Proceeding of the 13th International Workshop on High Voltage Engineering(IWHV2022) 2022.11

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Authorship：Lead author,　Corresponding author Language：English Publishing type：Research paper (international conference proceedings)
Arc resistance increasing during DC interruption using SiO2/Si3N4 mixture powder as arc interruption medium Reviewed

Naoto Kodama, Yaunobu Yokomizu, Waku Takenaka, and Kaito Hasegawa

Proceeding of the 75th Annual Gaseous Electronics Conference/11th International Conference on Reactive Plasmas 2022.10

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Authorship：Lead author,　Corresponding author Language：English Publishing type：Research paper (international conference proceedings)
Trial application of Si3N4 powder as alternative arc interruption medium for DC interruption Reviewed

Naoto Kodama, Yokomizu Yasunobu, Waku Takenaka, and Kaito Hasegawa

Proceeding of the 5th International Union of Materials Research Societies/International Conference of Young Researchers on Advanced Materials 2022.8

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Authorship：Lead author,　Corresponding author Language：English Publishing type：Research paper (international conference proceedings)
代替ガスを用いたアーク消弧過程で生じる化学種間の相互作用ポテンシャル -量子化学計算を用いた輸送特性の高精度導出に向けて

笠井豪, 兒玉直人, 横水康伸, 杉田武弘, DANISH M. S. S, 岩田幹正

電気学会研究会資料放電・プラズマ・パルスパワー/静止器/開閉保護合同研究会 2022.7

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Language：Japanese Publishing type：Research paper (conference, symposium, etc.)
電気接点の摺動・開離過程における電流転流プロセスおよび残留電流の理論計算 --ブラシ後部への高抵抗材適用による残留電流の低減--

川端大海,　横水康伸,　兒玉直人,　渡邉幹太,　福塚隆司

電気学会研究会資料放電・プラズマ・パルスパワー/静止器/開閉保護合同研究会 2022.7

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Language：Japanese Publishing type：Research paper (conference, symposium, etc.)
高温CO2/O2/CF3OH混合消弧ガスにおける凝縮相炭素の無生成とO2残存：温度300 Kおよび3000 Kにおける耐電圧特性

兒玉直人, 横水康伸, 杉田武弘, 中村泰規, 佐藤基宗

電気学会研究会資料放電・プラズマ・パルスパワー/静止器/開閉保護合同研究会 2022.7

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Authorship：Lead author Language：Japanese Publishing type：Research paper (conference, symposium, etc.)
High Temperature Gas Properties for Arc Formed in DC Fuse Using Silica-Sand Reviewed

Naoto Kodama, Yasunobu Yokomizu, Waku Takenaka, Kaito Hasegawa

Proceeding of the International Council on Electrical Engineering Conference 2022 2022.7

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Authorship：Lead author,　Corresponding author Language：English Publishing type：Research paper (international conference proceedings)
DC Arc Interruption Experiment using Arrangement of Polymer-Narrow Section inside Fuse-Case Filled with Silica-Sand

Naoto Kodama, Yasunobu Yokomizu, Waku Takenaka

Proceeding of the 6th International Conference on Electric Power Equipment -Switching Technology- 2022.3

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Authorship：Lead author,　Corresponding author Language：English Publishing type：Research paper (international conference proceedings)
Dielectric Breakdown Properties for High Temperature HFO−1234yf/CO2 Gas Mixture with Consideration of Predominant Molecular Products at 300−3000 K

Takehiro Sugita, Yasunobu Yokomizu, Naoto Kodama, Motohiro Sato, Yasunori Nakamura

Proceeding of the 6th International Conference on Electric Power Equipment -Switching Technology- 2022.3

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Language：English Publishing type：Research paper (international conference proceedings)
Arrangement of Silicone Flat Plate in Silica Sand Filling Space for DC Arc Resistance Rise

Waku Takenaka, Naoto Kodama, Yasunobu Yokomizu, Koya Nakamura, Hironori Shimizu

Proceeding of the 6th International Conference on Electric Power Equipment -Switching Technology- 2022.3

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Authorship：Corresponding author Language：English Publishing type：Research paper (international conference proceedings)
DC Arc Interruption Experiment using Arrangement of Polymer-Narrow Section inside Fuse-Case Filled with Silica-Sand

Kodama Naoto, Yokomizu Yasunobu, Takenaka Waku

2022 6TH INTERNATIONAL CONFERENCE ON ELECTRIC POWER EQUIPMENT - SWITCHING TECHNOLOGY (ICEPE-ST) page： 28 - 33 2022

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Language：Japanese Publisher：ICEPE-ST 2022 - 2022 6th International Conference on Electric Power Equipment - Switching Technology

It is strongly desired for DC fuse that a compatibility of high arc resistance(rarc) during a DC arc interruption and high insulation resistance(Rins) after the DC arc interruption. This paper describes a trial experiment of DC arc interruption under following conditions. (1) Copper(Cu)-element arrangement in silica-sand filling space(designated as "S-wo"), (2) Arrangement of a polymer fuse-case filled with the silica-sand around the Cu-element(designated as "S-CaseA"), and (3) Arrangement of a polymer narrow-section around an arc-ignition point of Cu-element in the silica-sand filled fuse-case(designated as "S-CaseB"). The damping DC with a prospective peak of 1000 A was energized to the Cu-element to ignite the DC arc. As a result, the compatibility of high rarc and high Rins was successfully achieved only under the S-CaseB condition. These high rarc and high Rins can be interpreted from the shrinking of arc conductive diameter by the silica-sand filled inside the fuse-case and formation of insulation layer by the ablation of the polymer-narrow section.

DOI： 10.1109/ICEPE-ST51904.2022.9757094

Web of Science

Scopus
Dielectric Breakdown Properties for High Temperature HFO-1234yf/CO2 Gas Mixture with Consideration of Predominant Molecular Products at 300-3000 K

Sugita Takehiro, Yokomizu Yasunobu, Kodama Naoto, Nakamura Yasunori, Sato Motohiro

2022 6TH INTERNATIONAL CONFERENCE ON ELECTRIC POWER EQUIPMENT - SWITCHING TECHNOLOGY (ICEPE-ST) page： 88 - 92 2022

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Language：Japanese Publisher：ICEPE-ST 2022 - 2022 6th International Conference on Electric Power Equipment - Switching Technology

With regard to HFO-1234yf mixed with CO2 as a buffer gas, this paper describes dielectric breakdown properties such as an electron attachment coefficient and a critical reduced electric field strength Ecr/N at 300-3000 K. First, this paper covers predominant molecular products through thermal dissociation and combination reactions for 20%HFO-1234yf/80%CO2 gas mixture. Secondly, dielectric breakdown properties of the mixture in consideration of the predominant gaseous molecular products are described to show that Ecr/N is 87-100 Td at 300-3000 K.

DOI： 10.1109/ICEPE-ST51904.2022.9757102

Web of Science

Scopus
珪砂を用いた直流アーク消弧過程で生じる高温ガスの特性

兒玉直人，横水康伸，中村晃也，竹中湧，清水宏紀

電気学会研究会資料放電・プラズマ・パルスパワー/開閉保護/高電圧合同研究会 2021.11

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Authorship：Lead author Language：Japanese Publishing type：Research paper (conference, symposium, etc.)
電気接点の摺動・開離における電流減少プロセスの理論計算―転流回路インダクタンスに対する残留電流の依存性―

川端大海，横水康伸，兒玉直人，渡邉幹太，福塚隆司

電気学会研究会資料放電・プラズマ・パルスパワー/開閉保護/高電圧合同研究会 2021.11

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Language：Japanese Publishing type：Research paper (conference, symposium, etc.)
DC Arc Resistance Rise by PMMA Cylinder Ablation with Arc Shrinking in Silica Sand Filling Space Reviewed

Kodama Naoto, Nakamura Koya, Yokomizu Yasunobu, Takahashi Asato, Yamamura Naoki

IEEJ TRANSACTIONS ON ELECTRICAL AND ELECTRONIC ENGINEERING 2021.8

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Authorship：Lead author,　Corresponding author Language：English Publishing type：Research paper (scientific journal) Publisher：IEEJ Transactions on Electrical and Electronic Engineering

Concerning DC arc quenching phenomenon in silica sand filling space, we have proposed a new method for raising an arc column resistance (rcol) by use of polymer-material arrangement. This paper reveals physical factors for rcol rise on the bases of experimental results using the following cylinders made of: (i) Quartz (SiO2) and (ii) PMMA ((C5H8O2)n) with various inner diameters ϕ. For ϕ = 2 mm case, rcol measured for a PMMA cylinder arrangement indicated higher rcol at low current region, while almost same rcol around current peak. For ϕ = 3 mm case, rcol for the PMMA cylinder was lower than rcol for the quartz case at high current region, while almost comparable between these conditions at low current region. For ϕ = 5 mm case, rcol were almost same during the arc quenching process. To discuss the effect of the rcol rise, the followings were also performed: (i) observation of cylinders after arc quenching and (ii) calculation of the electron density of SiO2/Cu or PMMA/SiO2 mixture vapors. It is concluded that, at high current region, rcol can increase due to the shrinking of the arc conductive diameter caused by the cylinder hole and the silica sand filled inside the cylinder hole. On the other hand, the admixing of the PMMA ablation vapor increases rcol at low current region in the present experiment. © 2021 Institute of Electrical Engineers of Japan. Published by Wiley Periodicals LLC.

DOI： 10.1002/tee.23462

Web of Science

Scopus
珪砂-Silicone材併用時のDCアーク抵抗上昇効果の検討

竹中湧，兒玉直人，中村晃也，横水康伸，山村直希

電気学会研究会資料放電・プラズマ・パルスパワー/静止器/開閉保護合同研究会 2021.7

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Authorship：Corresponding author Language：Japanese Publishing type：Research paper (conference, symposium, etc.)
N2/O2/HFO-1336mzz(E)混合ガスにおける衝突電離係数・電子付着係数および臨界電界—温度1500 K，HFO-1336mzz(E)混合率0~20%

杉田武弘，横水康伸，兒玉直人，中村泰規，佐藤基宗

電気学会研究会資料放電・プラズマ・パルスパワー/静止器/開閉保護合同研究会 2021.7

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Language：Japanese Publishing type：Research paper (conference, symposium, etc.)
SiC-MOSFETの熱インピーダンスの過渡特性を表すCauer型等価熱回路の構築:パワー半導体を用いた低電圧DC遮断器への適用

渡邉幹太，横水康伸，兒玉直人

電気学会研究会資料放電・プラズマ・パルスパワー/静止器/開閉保護合同研究会 2021.7

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Authorship：Last author Language：Japanese Publishing type：Research paper (conference, symposium, etc.)
Increasing Arc Column Resistance During DC Arc-Quenching Through Arrangement of Polymer Cylinder in Silica Sand Reviewed

Nakamura Koya, Kodama Naoto, Yokomizu Yasunobu, Takahashi Asato, Kondo Yusuke

IEEJ TRANSACTIONS ON ELECTRICAL AND ELECTRONIC ENGINEERING Vol. 16 ( 6 ) page： 905 - 915 2021.6

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Authorship：Corresponding author Language：English Publishing type：Research paper (scientific journal) Publisher：IEEJ Transactions on Electrical and Electronic Engineering

In this study, experiments pertaining to direct current (DC) interruptions are performed in an arc-quenching chamber filled with silica sand. First, the arc column resistance is measured during DC arc-quenching to demonstrate the elementary aspects of the arc in the silica-sand-filled space. Subsequently, an arrangement comprising a polymer cylinder between electrodes in the silica-sand-filled space is proposed to increase the arc column resistance during DC arc-quenching. A polymethyl methacrylate (PMMA) cylinder is used in the experiments. Measurement results indicate that the arrangement of the PMMA cylinder causes the arc column resistance to increase approximately twofold in comparison with the no-PMMA cylinder arrangement. Finally, the effect of increasing the arc column resistance is discussed in terms of PMMA and silica vapor. © 2021 Institute of Electrical Engineers of Japan. Published by Wiley Periodicals LLC.

DOI： 10.1002/tee.23368

Web of Science

Scopus
Predominant reaction products and dielectric breakdown properties of gas mixtures consisting of SF<inf>6</inf>and ablation products of C<inf>2</inf>F<inf>4</inf>/BN in the temperature range of 300-3000 K Reviewed

Yokomizu Y., Terada M., Kodama N., Ishii T., Kojima Y., Kuroda M., Urai H.

Journal of Physics D: Applied Physics Vol. 54 ( 16 ) 2021.4

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Language：English Publishing type：Research paper (scientific journal) Publisher：Journal of Physics D: Applied Physics

DOI： 10.1088/1361-6463/abda80

Web of Science

Scopus
High Temperature Properties of CO2 Gas Mixture with O2 and HFO-1234yf Decompositions: Predominant Molecular Products and Critical Electric Field Strength at 300-3000 K Reviewed

Yokomizu Yasunobu, Kodama Naoto, Sugita Takehiro, Ishii Tatsuya, Sato Motohiro, Nakamura Yasunori

電気学会論文誌Ｂ（電力・エネルギー部門誌） Vol. 141 ( 11 ) page： 700 - 711 2021

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Language：English Publishing type：Research paper (scientific journal) Publisher：一般社団法人電気学会

The gases used in high voltage electric power equipment are required to withstand against an externally applied electric field strength. It is therefore essential to find out the electrical insulation strength of the gas. However the high temperature gas formed after the current zero through the arc extinction process in a circuit breaker shows different insulation strengths from that at room temperature, because the high temperature gas consists of various molecular products different from the original gas at room temperature. The CF3CFCH2 (called as HFO-1234yf) at room temperature is known to have a remarkable electrical insulation property similar to SF6. After describing the products generated in CO2 gas mixture with O2 and HFO-1234yf decompositions at temperatures below 3000K, this paper mentions dielectric breakdown properties of the mixtures in view of the molar fractions of the molecular products. Discussions are furthermore made to compare dielectric breakdown properties of CO2 gas and CO2/O2 gas mixture at high temperatures.

DOI： 10.1541/ieejpes.141.700
Interpretation of Arc Column Resistance Rise on basis of Temperature and Cu Vapor Concentration of DC Arc Established in Silica Sand Filling Space Reviewed

Kodama Naoto, Yokomizu Yasunobu, Takahashi Asato, Nakamura Koya, Yamamura Naoki

電気学会論文誌Ｂ（電力・エネルギー部門誌） Vol. 141 ( 11 ) page： 725 - 733 2021

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Authorship：Lead author,　Corresponding author Language：English Publishing type：Research paper (scientific journal) Publisher：一般社団法人電気学会

DC arc interruptions were carried out under following two conditions: (1) silica sand filling without any cylinder arrangement (designation: Silica), and (2) The silica sand filling with a quartz cylinder arrangement (designation: SilicaQuartz). During these experiments, optical emission spectroscopy (OES) measurements were carried out to investigate an arc column resistance rise by the quartz cylinder arrangement. An arc temperature T and a Cu vapor concentration were evaluated from the OES results. As a result, T were measured to be around 24 kK for the Silica condition and 17kK for the SilicaQuartz condition at a current peak. The Cu vapor concentration under the Silica condition gradually decreased with T decaying. On the other hands, the quartz cylinder arrangement in the silica sand filling space drastically decreased the Cu vapor concentration during an arc-quenching process. This drastic decrease in the Cu vapor concentration is one of key factors to increase rcol under the cylinder arrangement in the silica sand filling space. This verification result can be useful to increase an interruption capacity of fuse.

DOI： 10.1541/ieejpes.141.725
Characteristic Analysis of Thermal Plasma Formed Inside Power Protection Equipment and Development of DC Protection Device Invited Reviewed

Naoto Kodama

Vol. 45 ( 3 ) page： 112 - 113 2021

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Authorship：Lead author Language：Japanese
DC arc resistance rise by PMMA cylinder ablation with arc shrinking in silica-sand filled space

Koya Nakamura,Naoto Kodama,Yasunobu Yokomizu,Naoki Yamamura

The Papers of Technical Meeting, IEEJAPAN　12nd International Workshop on High Voltage Engineering (IWHV2020) 2020.11

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珪砂を用いた直流遮断過程におけるアーク内銅蒸気の二次元分布観測と濃度に関する検討

兒玉直人，横水康伸，中村晃也，高橋明里，山村直希

電気学会研究会資料放電・プラズマ・パルスパワー/静止器/開閉保護合同研究会 2020.9

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Authorship：Lead author,　Corresponding author Language：Japanese Publishing type：Research paper (conference, symposium, etc.)
C3H2F4を混合した代替消弧ガスCO2/O2: 8%混合率，温度300-3000 Kにおける衝突電離・電子付着係数および臨界電界

杉田武弘，横水康伸，兒玉直人，石井達也，佐藤基宗，中村秦規

電気学会研究会資料放電・プラズマ・パルスパワー/静止器/開閉保護合同研究会 2020.9

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Authorship：Corresponding author Language：Japanese Publishing type：Research paper (conference, symposium, etc.)
Chemical species produced in arc-quenching gas CO2/O-2 mixed with C3H2F4, C4-FN or C5-FK: prevention of condensed-phase carbon formation and its formulation Reviewed

Yokomizu Y., Sato M., Kodama N., Edo T., Kokura K.

JOURNAL OF PHYSICS D-APPLIED PHYSICS Vol. 53 ( 14 ) 2020.1

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Language：English Publishing type：Research paper (scientific journal)

DOI： 10.1088/1361-6463/ab66d5

Web of Science

Scopus
珪砂中への円筒設置時における直流アーク温度の測定とアーク電圧上昇機構の検討

兒玉直人，横水康伸，中村晃也，高橋明里，近藤祐介

電気学会研究会資料放電・プラズマ・パルスパワー/開閉保護/高電圧合同研究会 2019.12

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Authorship：Lead author,　Corresponding author Language：Japanese Publishing type：Research paper (conference, symposium, etc.)
珪砂-高分子円筒併設時の直流アーク抵抗上昇機構に関する検討

中村晃也，兒玉直人，横水康伸，高橋明里，近藤祐介

電気学会研究会資料放電・プラズマ・パルスパワー/静止器/開閉保護合同研究会 2019.7

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Authorship：Corresponding author Language：Japanese Publishing type：Research paper (conference, symposium, etc.)
Fundamental study on role of silica-sand and polymer cylinder in terms of gas properties during DC interruption Reviewed

Kodama N., Yokomizu Y., Takahashi A., Nakamura K., Kondo Y.

Proceeding of XXXIV International Conference on Phenomena in Ionized Gases/ 10th International Conference on Reactive Plasmas 2019.7

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Authorship：Lead author Language：English Publishing type：Research paper (international conference proceedings)
Efficient modification of Si/SiOz nanoparticles by pulse-modulated plasma flash evaporation for an improved capacity of lithium-ion storage Reviewed

M.Kambara*, S.Hamazaki, N. Kodama and Yasunori Tanaka

Journal of Physics D: Applied Physics Vol. 52 ( 32 ) page： 325502 2019.7

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Language：English Publishing type：Research paper (scientific journal)

DOI： 10.1088/1361-6463/ab1c9f
Spatial distribution of Ti vapor admixture ratio in Ar induction thermal plasma torch during Ti feedstock injection Reviewed

Naoto Kodama, Yasunori Tanaka, Yosuke Ishisaka, Kotaro Shimizu, Yoshihiko Uesugi, Tatsuo Ishijima, Shu Watanabe, Shiori Sueyasu, Keitaro Nakamura

JAPANESE JOURNAL OF APPLIED PHYSICS Vol. 57 ( 3 ) 2018.3

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Language：English Publishing type：Research paper (scientific journal) Publisher：Japan Society of Applied Physics

The spatial distribution of the Ti vapor admixture ratio (X Ti) was determined together with Ti excitation temperature () from two-dimensional (2D) optical emission spectroscopy (OES) during Ti feedstock injection into an Ar induction thermal plasma (ICTP) torch for Ti nanoparticle synthesis. The X Ti is one important parameter affecting ICTP properties such as its electrical conductivity. The value of X Ti was estimated from the radiation intensity ratio of the Ar atomic line to the Ti atomic line, and obtained from 2D OES observation. Furthermore the electron density (n e) was also determined from the estimated results of and X Ti through the equilibrium composition. These 2D OES results revealed as 2500-4000 K at around the central axis of the ICTP torch, although it was higher than 4000 K in the off-axis region. In the off-axis region, X Ti and n e were much higher than in the on-axis region.

DOI： 10.7567/JJAP.57.036101

Scopus
High-rate synthesis of Si nanowires using modulated induction thermal plasmas Reviewed

Yosuke Ishisaka, Naoto Kodama, Kentaro Kita, Yasunori Tanaka, Yoshihiko Uesugi, Tatsuo Ishijima, Shiori Sueyasu, Shu Watanabe, Keitaro Nakamura

APPLIED PHYSICS EXPRESS Vol. 10 ( 9 ) 2017.9

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Language：English Publishing type：Research paper (scientific journal) Publisher：IOP PUBLISHING LTD

Using 20kW Ar-H-2 pulse-modulated induction thermal plasma (PMITP) with time-controlled feeding of feedstock (TCFF), numerous Si nanowires were synthesized rapidly at 1,000mgh(-1) without the intentional addition of catalysts. The PMITP + TCFF method is our original method for nanomaterial synthesis. The PMITP periodically provides a unique field including higher-temperature plasma during "on-time" and a lower-temperature plasma during "off-time". For rapid and efficient evaporation, metal-grade Si powder feedstock was intermittently injected synchronously into the generated Ar-H-2 PMITP. The synthesized products were analyzed using various analytical techniques. The synthesized products were Si nanowires 10-30 nm in diameter with a SiOx surface layer. (C) 2017 The Japan Society of Applied Physics

DOI： 10.7567/APEX.10.096201

Web of Science
Spatiotemporal distribution of thermal plasma temperature and nucleation occurrence in a torch during TiO2 nanopowder synthesis Reviewed

N. Kodama, Y. Tanaka, K Kita, Y Ishisaka, Y. Uesugi, T. Ishijima, S. Sueyasu, K. Nakamura

Plasma Sources Science and Technologies 2017

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Language：English Publishing type：Research paper (scientific journal)

DOI： 10.1088/1361-6595/aa73ca
Fundamental study of Ti feedstock evaporation and precursor formation process in inductively coupled thermal plasmas during TiO₂ nanopowder synthesis Reviewed

N. Kodama, K. Kita, Y. Ishisaka, Y. Tanaka, Y. Uesugi, T. Ishijima, S. Sueyasu, K. Nakamura

Journal of Physics D: Applied Physics 2016

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Authorship：Lead author Language：English Publishing type：Research paper (scientific journal)

DOI： doi:10.1088/0022-3727/49/30/305501
A method for large-scale synthesis of Al-doped TiO₂ nanopowder using pulse-modulated induction thermal plasmas with time-controlled feedstock feeding Reviewed

Naoto Kodama, K. Kita, Y. Tanaka, Y. Uesugi, T. Ishijima, S. Watanabe, K. Nakamura

Journal of Physics D: Applied Physics 2014

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Authorship：Lead author Language：English Publishing type：Research paper (scientific journal)

DOI： doi:10.1088/0022-3727/47/19/195304
Two-dimensional spectroscopic observation in the plasma torch for the pulse-modulated induction thermal plasmas for nanopowder synthesis Reviewed

N. Kodama, K. Kita, Y. Tanaka, Y. Uesugi, T. Ishijima, S. Watanabe, K. Nakamura

Journal of Physics: Conference Series 2014

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DOI： doi:10.1088/1742-6596/550/1/012026

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To the head of Papers.▲

Presentations 128

高温アークのガス特性解析に基づく電力遮断技術の高性能化 Invited

兒玉直人

応用物理学会プラズマエレクトロニクス分科会第40回プラズマ新領域研究会 2023.3.27 応用物理学会プラズマエレクトロニクス分科会

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Event date： 2023.3

Language：Japanese Presentation type：Oral presentation (invited, special)

Venue：オンライン Country：Japan
C2F4の電子物性とPTFEの生成機構

林俊雄, 石川健治, 関根誠, 堀勝, 兒玉直人, 豊田浩孝

第70回応用物理学会春季学術講演会 2022.3.17 応用物理学会

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Event date： 2023.3

Language：Japanese Presentation type：Oral presentation (general)

Venue：東京 Country：Japan
窒化ホウ素パウダーと珪砂を併用した大電流アークの限流・遮断プロセス－窒化ホウ素30wt%混合－

兒玉直人・横水康伸・竹中湧・岩田幹正・M. S. S. Danish

令和5年電気学会全国大会 2023.3.15 電気学会

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Event date： 2023.3

Language：Japanese Presentation type：Oral presentation (general)

Venue：名古屋 Country：Japan
量子化学計算を併用した高温消弧ガス特性の解析 Invited

兒玉直人・横水康伸

令和5年電気学会全国大会 2023.3.17 電気学会

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Event date： 2023.3

Language：Japanese Presentation type：Oral presentation (invited, special)

Venue：名古屋 Country：Japan
Wavelet変換を用いたDCシリーズアークの電流波形解析の試行－DC設備における故障アーク検出技術の開発に向けて－

西山直希・岩田幹正・横水康伸・兒玉直人・M. S. S. Danish

令和5年電気学会全国大会 2023.3.17 電気学会

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Event date： 2023.3

Language：Japanese Presentation type：Oral presentation (general)

Venue：名古屋 Country：Japan
量子化学計算を用いた酸素原子間の衝突に対する散乱角の導出－輸送特性の高精度導出に向けて－

笠井豪・兒玉直人・横水康伸・杉田武弘・M. S. S. Danish・岩田幹正

令和5年電気学会全国大会 2023.3.16 電気学会

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Event date： 2023.3

Language：Japanese Presentation type：Oral presentation (general)

Venue：名古屋 Country：Japan
自然由来系CO2/O2混合ガスの高温下における耐電界特性－10%C2F4と10%Cuの2種蒸気混入－

内山隼輔・横水康伸・兒玉直人・杉田武弘・真島周也・森正・井上徹

令和5年電気学会全国大会 2023.3.16 電気学会

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Event date： 2023.3

Language：Japanese Presentation type：Oral presentation (general)

Venue：名古屋 Country：Japan
C2F4溶発蒸気が混入したドライエア消弧ガスの耐電界特性－C2F4混入率10%および30%－

山本伊織・横水康伸・兒玉直人・佐藤基宗・中村泰規・江戸貴広

令和5年電気学会全国大会 2023.3.16 電気学会

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Event date： 2023.3

Language：Japanese Presentation type：Oral presentation (general)

Venue：名古屋 Country：Japan
SiC-MOSFET素子を用いた低電圧DC遮断－減衰振動性電流の生成による限流とその基礎検討－

長谷川海渡・横水康伸・兒玉直人・渡邉幹太

令和5年電気学会全国大会 2023.3.15 電気学会

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Event date： 2023.3

Language：Japanese Presentation type：Oral presentation (general)

Venue：名古屋 Country：Japan
円柱導体におけるAC・DC通電時の温度上昇の解析－電力DC機器の短絡性能の検証方法の開発に向けて－

重村優介・横水康伸・岩田幹正・兒玉直人・M. S. S. Danish

令和5年電気学会全国大会 2023.3.15 電気学会

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Event date： 2023.3

Language：Japanese Presentation type：Oral presentation (general)

Venue：名古屋 Country：Japan
整流子片の摺動・開離過程におけるDC整流プロセスの理論計算－摺動速度および配線インダクタンスの残留電流に対する依存性－

川端大海・横水康伸・兒玉直人・渡邉幹太・福塚隆司

令和5年電気学会全国大会 2023.3.15 電気学会

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Event date： 2023.3

Language：Japanese Presentation type：Oral presentation (general)

Venue：名古屋 Country：Japan
高温Cu/SiO2混合蒸気の耐電圧特性 –化学組成および主要化学種の電離断面積–

中村哉太・兒玉直人・竹中湧・横水康伸・岩田幹正・M.S.S Danish

令和5年電気学会全国大会 2023.3.15 電気学会

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Event date： 2023.3

Language：Japanese Presentation type：Oral presentation (general)

Venue：名古屋 Country：Japan
珪砂とSilicone樹脂を併用したDC遮断過程で生成されるアークに対する消弧材蒸気濃度推定

竹中湧・兒玉直人・横水康伸・岩田幹正・M. S. S. Danish

令和5年電気学会全国大会 2023.3.15 電気学会

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Event date： 2023.3

Language：Japanese Presentation type：Oral presentation (general)

Venue：名古屋 Country：Japan
Analysis of Arc Characteristics for Improvement of Power Protection Device Performance Invited International conference

Naoto Kodama

The 6th International Conference on Electrical, Telecommunication, and Computer Engineering(ELTICOM 2022) 2022.11.23 Organization comittee of ELTICOM

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Event date： 2022.11

Presentation type：Oral presentation (invited, special)

Venue：Medan Country：Indonesia
DC Arc Column Resistance Rise with Silicone Resin Painted on Copper Fuse-Element in Silica-sand Filling Space International conference

Waku Takenaka, Naoto Kodama, Kaito Hasegawa, Yasunobu Yokomizu, Hironori Shimizu

13th International Workshop on High Voltage Engineering (IWHV2022) 2022.11.22

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Event date： 2022.11

Language：English Presentation type：Oral presentation (general)

Venue：Okinawa, Japan Country：Japan
Simplified analysis of short-circuit current for hybrid AC/DC delivery system International conference

Mir Sayed Shah Danish, Mikimasa Iwata, Yasunobu Yokomizu, Naoto Kodama

13th International Workshop on High Voltage Engineering (IWHV2022) 2022.11.22 電気学会

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Event date： 2022.11

Language：English Presentation type：Oral presentation (general)

Venue：Okinawa, Japan Country：Japan
Reaction Products in SF6 Multi Mixture with C2F4-BN and Cu Vapor Decomposition at 300-3000 K: Approach to Dielectric Breakdown Property Evaluation International conference

YOKOMIZU Yasunobu, KODAMA Naoto, URAI Hajime, TERADA Masanao, KURODA Mami

13th International Workshop on High Voltage Engineering (IWHV2022) 2022.11.22 電気学会

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Event date： 2022.11

Language：English Presentation type：Oral presentation (general)

Venue：Okinawa, Japan Country：Japan
Experiment on DC Arc Quenching using Ablation of Polymer Narrow-Section Arranged around Fuse Element International conference

Kodama Naoto, Yokomizu Yasunobu, Takenaka Waku, Nakamura Kanata, Tozaki Shinsuke, Iwata Mikimasa, Danish M. S. S.

13th International Workshop on High Voltage Engineering (IWHV2022) 2022.11.22 電気学会

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Event date： 2022.11

Language：English Presentation type：Oral presentation (general)

Venue：Okinawa, Japan Country：Japan
Theoretical calculation of current commutation process and residual current during contact sliding movement - Application of High Resistivity Material to Fixed Contact Rear Part- International conference

Hiroumi Kawabata, Yasunobu Yokomizu, Naoto Kodama, Kanta Watanabe, Fukutsuka Takashi

13th International Workshop on High Voltage Engineering (IWHV2022) 2022.11.22 電気学会

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Event date： 2022.11

Language：English Presentation type：Oral presentation (general)

Venue：Okinawa, Japan Country：Japan
Arc resistance increasing during DC interruption using SiO2/Si3N4 mixture powder as arc interruption medium International conference

Naoto Kodama, Yaunobu Yokomizu, Waku Takenaka, and Kaito Hasegawa

75th Annual Gaseous Electronics Conference/11th International Conference on Reactive Plasmas 2022.10.6

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Event date： 2022.10

Language：English Presentation type：Oral presentation (general)

Country：Japan
窒化ケイ素粉体と珪砂粉体の混合粉体を用いた DC 遮断におけるアーク抵抗上昇

兒玉直人，横水康伸，竹中　湧，長谷川海渡

令和4年電気学会電力・エネルギー部門大会 2022.9.7

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Event date： 2022.9

Language：Japanese Presentation type：Oral presentation (general)

Venue：福井大学文京キャンパス Country：Japan
電力保護機器の高性能化に向けたアークのガス特性解析 Invited

兒玉直人

2022年度電気・情報関係学会北陸支部連合大会 2022.9.3

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Event date： 2022.9

Language：Japanese Presentation type：Oral presentation (invited, special)

Venue：オンライン Country：Japan
円柱導体における AC・DC 通電時の抵抗成分の変化 --- 電力 DC 機器の短絡性能の検証方法の開発に向けて ---

重村優介，横水康伸，岩田幹正，兒玉直人，M. S. S. Danish

令和4年度電気・電子・情報関係学会東海支部連合大会 2022.8.30

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Event date： 2022.8

Language：Japanese Presentation type：Oral presentation (general)

Venue：オンライン Country：Japan
Fundamental Analysis of Fault Current in the Case of Short-Circuit on the DC Side of a Hybrid AC/DC System

Mir Sayed Shah Danish，Mikimasa Iwata，Yasunobu Yokomizu，Naoto Kodama

令和4年度電気・電子・情報関係学会東海支部連合大会 2022.8.30

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Event date： 2022.8

Language：Japanese Presentation type：Oral presentation (general)

Venue：オンライン Country：Japan
Silicone 材と珪砂を併用した直流アーク消弧過程で生じる高温蒸気における熱拡散率の理論計算

竹中湧，兒玉直人，長谷川海渡，横水康伸，清水宏紀

令和4年度電気・電子・情報関係学会東海支部連合大会 2022.8.30

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Event date： 2022.8

Language：Japanese Presentation type：Oral presentation (general)

Venue：オンライン Country：Japan
ヒューズエレメント周囲に配置した高分子材の溶発を用いた DC アーク消弧実験

兒玉直人，横水康伸，竹中湧，中村哉太，岩田幹正，M. S. S. Danish

令和4年度電気・電子・情報関係学会東海支部連合大会 2022.8.30

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Event date： 2022.8

Language：Japanese Presentation type：Oral presentation (general)

Venue：オンライン Country：Japan
CF もしくは CF2 における同種化学種間の相互作用ポテンシャル - 量子化学計算を用いた輸送特性の高精度導出に向けて -

笠井豪，兒玉直人，横水康伸，杉田武弘，M. S. S. Danish，岩田幹正

令和4年度電気・電子・情報関係学会東海支部連合大会 2022.8.30

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Event date： 2022.8

Language：Japanese Presentation type：Oral presentation (general)

Venue：オンライン Country：Japan
自然由来系 CO2/O2 消弧ガスの高温下における耐電界特性 --30% および 80% の C2F4 溶発蒸気混入による変化 --

内山隼輔，横水康伸，兒玉直人，杉田武弘, 真島周也，森正，井上徹

令和4年度電気・電子・情報関係学会東海支部連合大会 2022.8.30

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Event date： 2022.8

Language：Japanese Presentation type：Oral presentation (general)

Venue：オンライン Country：Japan
DC モータの整流子片摺動過程における転流プロセスの理論計算 --- 摺動速度に対する残留電流の依存性 ---

川端大海，横水康伸，兒玉直人，渡邉幹太，福塚隆司

令和4年度電気・電子・情報関係学会東海支部連合大会 2022.8.30

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Event date： 2022.8

Language：Japanese Presentation type：Oral presentation (general)

Venue：オンライン Country：Japan
Trial application of Si3N4 powder as alternative arc interruption medium for DC interruption International conference

Naoto Kodama, Yokomizu Yasunobu, Waku Takenaka, and Kaito Hasegawa

The 5th International Union of Materials Research Societies/International Conference of Young Researchers on Advanced Materials 2022.8.4

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Event date： 2022.8

Language：English Presentation type：Oral presentation (general)

Venue：Fukuoka/Hybrid Country：Japan
電気接点の摺動・開離過程における電流転流プロセスおよび残留電流の理論計算 --ブラシ後部への高抵抗材適用による残留電流の低減--

川端大海,横水康伸,兒玉直人,渡邉幹太,福塚隆司

放電・プラズマ・パルスパワー/静止器/開閉保護合同研究会 2022.7.20

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Event date： 2022.7

Language：Japanese Presentation type：Oral presentation (general)

Venue：名古屋大学 Country：Japan
高温CO2/O2/CF3OH混合消弧ガスにおける凝縮相炭素の無生成とO2残存：温度300 Kおよび3000 Kにおける耐電圧特性

兒玉直人,横水康伸,杉田武弘, 中村泰規,佐藤基宗

放電・プラズマ・パルスパワー/静止器/開閉保護合同研究会 2022.7.21

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Event date： 2022.7

Language：Japanese Presentation type：Oral presentation (general)

Venue：名古屋大学 Country：Japan
代替ガスを用いたアーク消弧過程で生じる化学種間の相互作用ポテンシャル -量子化学計算を用いた輸送特性の高精度導出に向けて

笠井　豪,兒玉直人,横水康伸,杉田武弘,DANISH M. S. S,岩田幹正

放電・プラズマ・パルスパワー/静止器/開閉保護合同研究会 2022.7.21

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Event date： 2022.7

Language：Japanese Presentation type：Oral presentation (general)

Venue：名古屋大学 Country：Japan
High Temperature Gas Properties for Arc Formed in DC Fuse Using Silica-Sand International conference

Naoto Kodama, Yasunobu Yokomizu, Waku Takenaka, Kaito Hasegawa

The International Council on Electrical Engineering Conference 2022 2022.7.1

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Event date： 2022.6 - 2022.7

Language：English Presentation type：Oral presentation (general)

Venue：Korea/Hybrid Country：Korea, Republic of
量子化学計算によるCF3OH分子の特性導出とCO2/O2/CF3OH混合消弧ガスの高温下化学組成

杉田武弘，横⽔康伸，兒⽟直⼈，中村泰規，佐藤基宗

令和4年電気学会全国大会 2022.3.21 電気学会

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Event date： 2022.3

Language：Japanese Presentation type：Oral presentation (general)

Venue：オンライン Country：Japan
SiC-MOSFET素子による低電圧直流遮断プロセスにおけるPN接合部温度と端子間電圧－大電流型素子の適用－

渡邉幹太，横水康伸，兒玉直人，藤田雄大

令和4年電気学会全国大会 2022.3.22 電気学会

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Event date： 2022.3

Language：Japanese Presentation type：Oral presentation (general)

Venue：オンライン Country：Japan
整流子片摺動による電流転流過程における残留電流の理論計算 -ブラシ後部への高抵抗材の適用-

川端大海，横水康伸，兒玉直人，渡邉幹太，福塚隆司

令和4年電気学会全国大会 2022.3.22 電気学会

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Event date： 2022.3

Language：Japanese Presentation type：Oral presentation (general)

Venue：オンライン Country：Japan
Cu製エレメントへのSilicone樹脂塗布による珪砂中DCアーク抵抗上昇に関する基礎実験

長谷川海渡，兒玉直人，横水康伸，竹中湧，清水宏紀

令和4年電気学会全国大会 2022.3.21 電気学会

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Event date： 2022.3

Language：Japanese Presentation type：Oral presentation (general)

Venue：オンライン Country：Japan
珪砂・Silicone混合蒸気における抵抗率および熱伝導率の理論計算

竹中湧，兒玉直人，中村晃也，横水康伸，清水宏紀

令和4年電気学会全国大会 2022.3.21 電気学会

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Event date： 2022.3

Language：Japanese Presentation type：Oral presentation (general)

Venue：オンライン Country：Japan
DC 遮断における窒化ケイ素と珪砂の併用によるアーク抵抗上昇

兒玉直人，横水康伸，竹中湧，長谷川海渡

令和4年電気学会全国大会 2022.3.21 電気学会

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Event date： 2022.3

Language：Japanese Presentation type：Oral presentation (general)

Venue：オンライン Country：Japan
CO2 もしくはCOF2 の同種分子間衝突における分光定数 -代替消弧ガスの高温下輸送特性の導出に向けて-

笠井豪，兒玉直人，横水康伸，杉田武弘

令和4年電気学会全国大会 2022.3.21 電気学会

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Event date： 2022.3

Language：Japanese Presentation type：Oral presentation (general)

Venue：オンライン Country：Japan
Arrangement of Silicone Flat Plate in Silica Sand Filling Space for DC Arc Resistance Rise International conference

Waku Takenaka, Naoto Kodama, Yasunobu Yokomizu, Koya Nakamura, Hironori Shimizu

The 6th International Conference on Electric Power Equipment -Switching Technology- 2022.3.17 ICEPE-ST Comittee

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Event date： 2022.3

Language：English Presentation type：Oral presentation (general)

Venue：Korea/Hybrid Country：Korea, Republic of
DC Arc Interruption Experiment using Arrangement of Polymer-Narrow Section inside Fuse-Case Filled with Silica-Sand International conference

2022.3.17 ICEPE-ST Comittee

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Event date： 2022.3

Language：English Presentation type：Oral presentation (general)

Country：Korea, Republic of
Dielectric Breakdown Properties for High Temperature HFO−1234yf/CO2 Gas Mixture with Consideration of Predominant Molecular Products at 300−3000 K International conference

Takehiro Sugita, Yasunobu Yokomizu, Naoto Kodama, Motohiro Sato, Yasunori Nakamura

The 6th International Conference on Electric Power Equipment -Switching Technology- 2022.3.17 ICEPE-ST Comittee

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Event date： 2022.3

Language：English Presentation type：Oral presentation (general)

Venue：Korea/Hybrid Country：Korea, Republic of
電気接点の摺動・開離における電流減少プロセスの理論計算―転流回路インダクタンスに対する残留電流の依存性―

川端大海，横水康伸，兒玉直人，渡邉幹太，福塚隆司

放電・プラズマ・パルスパワー/開閉保護/高電圧合同研究会 2021.11.29 電気学会

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Event date： 2021.11

Language：Japanese Presentation type：Oral presentation (general)

Venue：オンライン Country：Japan
珪砂を用いた直流アーク消弧過程で生じる高温ガスの特性

兒玉直人，横水康伸，中村晃也，竹中湧，清水宏紀

放電・プラズマ・パルスパワー/開閉保護/高電圧合同研究会 2021.11.30 電気学会

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Event date： 2021.11

Language：Japanese Presentation type：Oral presentation (general)

Venue：オンライン Country：Japan
大電流型 SiC-MOSFET を用いた低圧直流モデル遮断器による電流遮断時間の測定

渡邉幹太，横水康伸，兒玉直人

令和3年度電気・電子・情報関係学会東海支部連合大会 2021.9.7 電気学会東海支部

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Event date： 2021.9

Language：Japanese Presentation type：Oral presentation (general)

Venue：オンライン Country：Japan
CF3OH の振動定数および回転定数－ CF3OH を混合した消弧ガスにおける高温下化学組成の導出に向けて－

杉田武弘，横水康伸，兒玉直人，中村泰規，佐藤基宗

令和3年度電気・電子・情報関係学会東海支部連合大会 2021.9.7 電気学会東海支部

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Event date： 2021.9

Language：Japanese Presentation type：Oral presentation (general)

Venue：オンライン Country：Japan
C2F2 および C2F4 の分光定数　- 高温下における代替ガスの輸送特性の導出に向けて -

笠井豪，兒玉直人，横水康伸，杉田武弘

令和3年度電気・電子・情報関係学会東海支部連合大会 2021.9.7 電気学会東海支部

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Event date： 2021.9

Language：Japanese Presentation type：Oral presentation (general)

Venue：オンライン Country：Japan
珪砂中 DC 消弧過程における過渡アーク抵抗測定　―Cu 細線の増径による変化―

竹中湧，兒玉直人，中村晃也，横水康伸，清水宏紀

令和3年度電気・電子・情報関係学会東海支部連合大会 2021.9.7 電気学会東海支部

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Event date： 2021.9

Language：Japanese Presentation type：Oral presentation (general)

Venue：オンライン Country：Japan
整流子片摺動における電流転流過程の理論計算　―電気接点開離直前における接触抵抗の過渡推移に関する考察―

川端大海，横水康伸，福塚隆司，兒玉直人，渡邉幹太，小椋陽介

令和3年度電気・電子・情報関係学会東海支部連合大会 2021.9.7 電気学会東海支部

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Event date： 2021.9

Language：Japanese Presentation type：Oral presentation (general)

Venue：オンライン Country：Japan
整流子片摺動における残留電流の理論計算―回路電流に対する残留電流の依存性―

川端大海，渡邉幹太，横水康伸，兒玉直人，福塚隆司，小椋陽介

令和3年電気学会電力・エネルギー部門大会 2021.8.24 電気学会

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Event date： 2021.8

Language：Japanese Presentation type：Oral presentation (general)

Venue：オンライン Country：Japan
N2/O2/HFO-1336mzz(E)混合ガスにおける衝突電離係数・電子付着係数および臨界電界—温度1500 K，HFO-1336mzz(E)混合率0~20%

杉田武弘,横水康伸,兒玉直人,中村泰規,佐藤基宗

放電・プラズマ・パルスパワー/静止器/開閉保護合同研究会 2021.7.8 電気学会

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Event date： 2021.7

Language：Japanese Presentation type：Oral presentation (general)

Venue：オンライン Country：Japan
SiC-MOSFETの熱インピーダンスの過渡特性を表すCauer型等価熱回路の構築:パワー半導体を用いた低電圧DC遮断器への適用

渡邉幹太,横水康伸,兒玉直人

放電・プラズマ・パルスパワー/静止器/開閉保護合同研究会 2021.7.8 電気学会

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Event date： 2021.7

Language：Japanese Presentation type：Oral presentation (general)

Venue：オンライン Country：Japan
珪砂-Silicone材併用時のDCアーク抵抗上昇効果の検討

竹中湧,兒玉直人,中村晃也,横水康伸,山村直希

放電・プラズマ・パルスパワー/静止器/開閉保護合同研究会 2021.7.7 電気学会

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Event date： 2021.7

Language：Japanese Presentation type：Oral presentation (general)

Venue：オンライン Country：Japan
熱プラズマ内への固体材料投入時における高温ガス特性の変化ー微粒子生成時および電力保護機器内を例としてー Invited

兒玉直人

令和3年度第一回電気・高電圧・放電・プラズマ若手研究委員会 2021.6.21 静電気学会若手研究会

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Event date： 2021.6

Language：Japanese Presentation type：Oral presentation (invited, special)

Venue：オンライン Country：Japan
整流子片摺動におけるブラシ電流減少過程の理論計算-転流回路インダクタンスに対する残留電流の依存性-

川端大海，横水康伸，福塚隆司，兒玉直人，渡邉幹太，小椋陽介

令和3年電気学会全国大会 2021.3.9 電気学会

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Event date： 2021.3

Language：Japanese Presentation type：Oral presentation (general)

Venue：オンライン
N2/O2/HFO-1336mzz(E)混合ガスにおける衝突電離係数および電子付着係数－温度300~3000 K, HFO-1336mzz(E)混合率4%－

杉田武弘，横水康伸，兒玉直人，佐藤基宗，中村泰規

令和3年電気学会全国大会 2021.3.9 電気学会

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Event date： 2021.3

Language：Japanese Presentation type：Oral presentation (general)

Venue：オンライン
銅・珪砂混合蒸気における定圧比熱および抵抗率の理論計算による導出

中村晃也，兒玉直人，高橋明里，横水康伸，山村直希

令和3年電気学会全国大会 2021.3.9 電気学会

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Event date： 2021.3

Language：Japanese Presentation type：Oral presentation (general)

Venue：オンライン
珪砂-高分子材併用時の直流アーク抵抗上昇効果の検討 −Silicone平板設置条件−

竹中湧，中村晃也，兒玉直人，横水康伸，山村直希

令和3年電気学会全国大会 2021.3.9 電気学会

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Event date： 2021.3

Language：Japanese Presentation type：Oral presentation (general)

Venue：オンライン
高分子製狭隘部を設けたヒューズケースにおける直流アーク消弧実験

兒玉直人，横水康伸，中村晃也，竹中湧，山村直希

令和3年電気学会全国大会 2021.3.9 電気学会

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Event date： 2021.3 - 2020.3

Language：Japanese Presentation type：Oral presentation (general)

Venue：オンライン
DC arc resistance rise by PMMA cylinder ablation with arc shrinking in silica-sand filled space International conference

Koya Nakamura, Naoto Kodama, Yasunobu Yokomizu, Naoki Yamamura

2020.11.20

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Event date： 2020.11

Language：English Presentation type：Oral presentation (general)

Venue：オンライン
珪砂を用いた直流遮断過程におけるアーク内銅蒸気の二次元分布観測と濃度に関する検討

兒玉直人，横水康伸，中村晃也，高橋明里，近藤祐介，山村直希

放電・プラズマ・パルスパワー/静止器/開閉保護合同研究会 2020.9.28

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Event date： 2020.9

Language：Japanese Presentation type：Oral presentation (general)

Venue：オンライン
C3H2F4 を混合した代替消弧ガス CO2/O2: 8%混合率，温度 300～3000 K における衝突電離・電子付着係数および臨界電界

杉田武弘，横水康伸，兒玉直人，石井達也，佐藤基宗，中村泰規

放電・プラズマ・パルスパワー/静止器/開閉保護合同研究会 2020.9.29

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Event date： 2020.9

Language：Japanese Presentation type：Oral presentation (general)

Venue：オンライン
C3H2F4を混合したCO2/O2消弧ガスの衝突電離係数および電離付着係数 -温度2000 K，C3H2F4混合率0-24%-

杉田武弘，横水康伸，兒玉直人，石井達也，佐藤基宗，中村秦規

令和2年度電気・電子・情報関係学会東海支部連合大会 2020.9.4

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Event date： 2020.9

Language：Japanese Presentation type：Oral presentation (general)

Venue：オンライン
珪砂中へのシリコーン樹脂製の円筒設置による直流アーク抵抗上昇

中村晃也，兒玉直人，横水康伸，高橋明里，山村直希

令和2年度電気・電子・情報関係学会東海支部連合大会 2020.9.4

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Event date： 2020.9

Language：Japanese Presentation type：Oral presentation (general)

Venue：オンライン
過渡アーク周囲への板状導体配置による静電誘導を用いたアーク電位の非接触測定

兒玉直人，高橋明里，横水康伸，真島周也，内井敏之

令和2年度電気・電子・情報関係学会東海支部連合大会 2020.9.4

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Event date： 2020.9

Language：Japanese Presentation type：Oral presentation (general)

Venue：オンライン
砂-高分子円筒併用時の直流アーク抵抗上昇要因の分析-PMMA円筒，内径2 mm条件-

中村晃也，兒玉直人，高橋明里，横水康伸，近藤祐介

令和2年電気学会全国大会 2020.3.11 電気学会

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Event date： 2020.3

Language：Japanese Presentation type：Oral presentation (general)

Venue：東京電機大学
珪砂中での DC 遮断時におけるアーク内の銅蒸気濃度に関する検討

兒玉直人，横水康伸，中村晃也，高橋明里，近藤祐介

令和2年電気学会全国大会 2020.3.11 電気学会

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Event date： 2020.3

Language：Japanese Presentation type：Oral presentation (general)

Venue：東京電機大学
円弧型導体を用いた過渡アーク電位の非接触測定の試み

高橋明里，兒玉直人，横水康伸，真島周也，内井敏之

令和2年電気学会全国大会 2020.3.12 電気学会

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Event date： 2020.3

Language：Japanese Presentation type：Oral presentation (general)
C3H2F4を添加したCO2/O2消弧ガスの臨界電界—温度300～4000 K, C3H2F4添加率8%—

杉田武弘，横水康伸，兒玉直人，石井達也，佐藤基宗，中村泰規，小倉健太郎

令和2年電気学会全国大会 2020.3.11 電気学会

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Event date： 2020.3

Language：Japanese Presentation type：Oral presentation (general)

Venue：東京電機大学
高温SF6ガスへのC2F4/BN溶発分解蒸気および銅蒸気の混入による構成化学種の変化–CuF2 およびCuFの衝突電離断面積–

石井達也，横水康伸，兒玉直人，杉田武弘，寺田将直，浦井一，黒田真未

令和2年電気学会全国大会 2020.3.13 電気学会

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Event date： 2020.3

Language：Japanese Presentation type：Oral presentation (general)

Venue：東京電機大学
Arc voltage rise by cylinder arrangement in silica-sand filling space during DC arc interruption International conference

Naoto Kodama, Yasunobu Yokomizu, Asato Takahashi, Koya Nakamura, Yusuke Kondo

the 11th Asia-Pacific International Symposium on the Basics and Application of Plasma Technology

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Event date： 2019.12

Language：English Presentation type：Oral presentation (general)

Country：Japan
珪砂中への円筒設置時における直流アーク温度の測定とアーク電圧上昇機構の検討

兒玉直人，横水康伸，中村晃也，高橋明里，近藤祐介

放電・プラズマ・パルスパワー/開閉保護/高電圧合同研究会

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Event date： 2019.12

Language：Japanese Presentation type：Oral presentation (general)

Country：Japan
Visualization of particle number density distribution in the thermal plasma torch during Ti feedstock injection into Ar induction thermal plasma

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Event date： 2019.11

Language：Japanese Presentation type：Oral presentation (general)

Country：Japan
Approach to Mechanism Interpretation of Arc Voltage Rise by Polymer Cylinder Installation in Silica-Sand

Kodama N., Yokomizu Y., Nakamura K., Takahashi A., Kondo Y.

Proceedings of the 2019 5th International Conference on Electric Power Equipment - Switching Technology: Frontiers of Switching Technology for a Future Sustainable Power System, ICEPE-ST 2019 2019.10.14

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Event date： 2019.10

Language：English Presentation type：Oral presentation (general)

DOI： 10.1109/ICEPE-ST.2019.8928816

Scopus
Rise Effect of DC Arc Voltage in Silica Sand: Various Interelectrode Distances and Arrangement of PA66-Cylinder

Takahashi A. Nakamura K., Kodama N., Yokomizu Y., Kondo Y.

Proceedings of the 2019 5th International Conference on Electric Power Equipment - Switching Technology: Frontiers of Switching Technology for a Future Sustainable Power System, ICEPE-ST 2019 2019.10.14

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Event date： 2019.10

Language：English Presentation type：Oral presentation (general)

DOI： 10.1109/ICEPE-ST.2019.8928782

Scopus
軸方向開離型消弧装置を対象とした直流アーク電位の非接触測定の試み

高橋明里，横水康伸，兒玉直人，真島周也，内井敏之

令和元年度電気・電子・情報関係学会東海支部連合 2019.9.10

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Event date： 2019.9

Language：Japanese Presentation type：Oral presentation (general)
珪砂中への円筒配置時の直流アーク抵抗上昇－難燃材円筒を用いた実験－

中村晃也，兒玉直人，横水康伸，高橋明里，近藤祐介

令和元年度電気・電子・情報関係学会東海支部連合 2019.9.10

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Event date： 2019.9

Language：Japanese Presentation type：Oral presentation (general)
珪砂-高分子円筒併設時の直流アーク抵抗上昇機構に関する検討

中村晃也，兒玉直人，横水康伸，高橋明里，近藤祐介

放電・プラズマ・パルスパワー/静止器/開閉保護合同研究会 2019.7.24

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Event date： 2019.7

Language：Japanese Presentation type：Oral presentation (general)
Fundamental study on role of silica-sand and polymer cylinder in terms of gas properties during DC interruption International conference

Kodama N., Yokomizu Y., Takahashi A., Nakamura K., Kondo Y.

XXXIV International Conference on Phenomena in Ionized Gases (XXXIV ICPIG)/10th International Conference on Reactive Plasmas (ICRP-10) 2019.7.14

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Event date： 2019.7

Language：English Presentation type：Oral presentation (general)
珪砂中へのPMMA円筒設置時における直流アーク抵抗上昇機構の検討

兒玉直人，横水康伸，高橋明里，中村晃也，近藤祐介

電気学会全国大会

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Event date： 2019.3

Language：Japanese Presentation type：Oral presentation (general)

Country：Japan
アーク電位の非接触測定へ向けた検出回路に関する検討

高橋明里，中村晃也，兒玉直人，横水康伸，真島周也，内井敏之

平成31年電気学会全国大会 2019.3.14

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Event date： 2019.3

Language：Japanese Presentation type：Oral presentation (general)
代替消弧ガスCO2/O2 へのCF3CFCH2, C4-FN あるいはC5-FK の混合：凝縮相炭素の生成と気相化学種

横水康伸，兒玉直人，佐藤基宗，小倉健太郎

平成31年電気学会全国大会 2019.3.13

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Event date： 2019.3

Language：Japanese Presentation type：Oral presentation (general)
珪砂－高分子円筒併設手法を用いたアーク電圧上昇効果－異なる電流ピーク値条件での検討－

中村晃也，兒玉直人，高橋明里，横水康伸，近藤祐介

平成31年電気学会全国大会 2019.3.14

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Event date： 2019.3

Language：Japanese Presentation type：Oral presentation (general)
珪砂中へのPMMA円筒設置時における直流アーク抵抗上昇機構の

兒玉直人，横水康伸，中村晃也，高橋明里，近藤祐介

平成31年電気学会全国大会 2019.3.14

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Event date： 2019.3

Language：Japanese Presentation type：Oral presentation (general)
Installation of PA66, PMMA or Si-resin cylinders in silica-sand for rising arc voltage during DC interruption

Naoto Kodama, Asato Takahashi, Koya Nakamura, Yasunobu Yokomizu, Yusuke Kondo

The 11th International Workshop on High Voltage Engineering

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Event date： 2018.11

Language：English Presentation type：Oral presentation (general)

Country：Japan
High-Rate Synthesis of Si/C Nanoparticles using Pulse-Modulated Induction Thermal Plasmas with Intermittent Feeding of Feedstock International conference

K.Shimizu*, K.Onda, Y.Ishisaka, N.Kodama, Yasunori Tanaka, Y.Uesugi, T Ishijima,S Sueyasu, S. Watanabe, K.Nakamura

2nd Asia-Pacific Conference on Plasma Physics 2018.11

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Event date： 2018.11

Language：English Presentation type：Poster presentation

Venue：Kanazawa Country：Japan
珪砂中へのPA66，PMMAおよびSi樹脂設置による直流アーク遮断時間の短縮- 原子化エンタルピーからの解釈 -

兒玉直人，高橋明里，中村晃也，横水康伸，近藤祐介

平成30年度電気・電子・情報関係学会東海支部連合大会 2018.9.3 電気学会東海支部

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Event date： 2018.9

Language：Japanese Presentation type：Oral presentation (general)
Two-dimensional estimation of number density distribution of precursor molecules during TiO2 nanopowder synthesis using induction thermal plasmas International conference

Naoto Kodama, Yasunori Tanaka*, Kazuki Onda, Kotaro Shimizu, Yoshihiko Uesugi, Tatsuo Ishijima, Sueyasu Sueyasu, Shu Watanabe, Keitaro Nakamura

High-Tech Plasma Processes (HTPP2018) 2018.7

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Event date： 2018.7

Language：English Presentation type：Oral presentation (general)

Venue：Toulouse Country：France
Trial Synthesis of Silicon Nanoparticles using a Newly Developed Tandem Type of Modulated Induction Thermal Plasma with Lower Coil Current Modulation, International conference

Kazuki Onda*, Naoto Kodama, Yosuke Ishisaka, Kotaro Shimizu, Yasunori Tanaka, Uesugi Yoshihiko, Tatsuo Ishijima, Shiori Sueyasu, Shu Watanabe, Keitaro Nakamura

High-Tech Plasma Processes (HTPP2018) 2018.7

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Event date： 2018.7

Language：English Presentation type：Poster presentation

Venue：Toulouse Country：France
A Numerical Study on Tandem Type of Ar Induction Thermal Plasmas -Influence of the Gap Length between Upper and Lower Coils- International conference

K.Onda*, N. Kodama, Y. Ishisaka, K.Shimizu Yasunori Tanaka, Y. Uesugi, T. Ishijima, S. Sueyasu, S. Watanabe, K. Nakamura

ISPlasma2018/IC-PLANTS2018 2018.3

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Event date： 2018.3

Language：English Presentation type：Poster presentation

Venue：Nagoya Country：Japan
Estimation of Ti excitation temperature and power density distribution in the Ar induction thermal plasma during Ti feedstock injection International conference

N. Kodama, Y. Ishisaka, K. Shimizu, Y. Tanaka, Y. Uesugi, T. Ishijima, S. Sueyasu, S. Watanabe, K. Nakamura

The 10th Asian-Pacific International Symposium on the Basics and Applications of Plasma Technology

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Event date： 2017.12

Language：English Presentation type：Oral presentation (general)

Venue：Chung Yuan Christian University Country：China
Large-Scale Synthesis of Nanomaterial using Inductively Coupled Thermal Plasma and Visualization of Nanoparticle Synthesis Field in the Thermal Plasma Torch Invited International conference

The workshop on Fine Particle Plasmas 2017.12.12

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Event date： 2017.12

Language：English Presentation type：Oral presentation (invited, special)

Country：Japan
Influence of current modulation on the size distribution of nanoparticles synthesized in gas phase in induction thermal plasmas International conference

Yasunori Tanaka*, N. Kodama, Y. Ishisaka, Y. Uesugi, T.Ishijima, S. Watanabe, K. Nakamura, T. Kooka, T. Seto

Asia-Pacific Int. Symp.on the Basics & Appl. Plasma Technol. (APSPT-10) 2017.12

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Event date： 2017.12

Language：English Presentation type：Oral presentation (general)

Venue：Taoyuan Country：Taiwan, Province of China
パルス変調型誘導熱プラズマおよび原料粉体の同期間歇供給を用いたAl³⁺-doped TiO₂ナノ粒子の大量生成法の開発 Invited

兒玉直人，北健太郎，田中康規，上杉喜彦，石島達夫，渡邉周，中村圭太郎

第78回応用物理学会秋季学術講演会

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Event date： 2017.9

Language：Japanese Presentation type：Oral presentation (invited, special)

Venue：福岡国際会議場 Country：Japan
Two-dimensional distribution of Ti vapor admixture ratio and Ti atomic density in the Ar ICTP torch during Ti feedstock injection International conference

N. Kodama, Y. Ishisaka, K. Shimizu, Y. Tanaka, Y. Uesugi, T. Ishijima, S. Sueyasu, S. Watanabe, K. Nakamura

23rd International Symposium on Plasma Chemistry

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Event date： 2017.7 - 2017.8

Language：English Presentation type：Oral presentation (general)

Venue：Montreal, Canada Country：Canada
Large Amount Synthesis of Si Nanopowder/Nanowires using Pulse-Modulated Induction Thermal Plasmas International conference

Y.Ishisaka*, N. Kodama, Yasunori Tanaka, Y. Uesugi, T. Ishijima, S. Sueyasu, S.Watanabe, K.~Nakamura

Int.Symp.Plasma Chem. (ISPC-23) 2017.7

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Event date： 2017.7

Language：English Presentation type：Oral presentation (general)

Venue：Montreal Country：Canada
Nanopowder synthesis processes using the time-controlled induction thermal plasmas Invited International conference

Yasunori Tanaka*, N. Kodama, Y.Ishisaka, Y.Uesugi, T.Ishijima, S.Sueyasu, S.Watanabe and T.Nakamura

Joint 13th Asia Pacific Physics Conference and 22nd Australian Institute of Physics Congress 2016.12

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Event date： 2016.12

Language：English Presentation type：Oral presentation (invited, special)

Venue：Brisbane Country：Australia
High rate synthesis of Si/SiOx nanoparticles/nanowires using modulated induction thermal plasmas with controlled feedstock feeding International conference

Yasunori Tanaka*, Y.Ishisaka, N.Kodama, K.Kita, Y. Uesugi, T. Ishijima, S. Sueyasu, K. Nakamura

14th High-Tech Plasma Processes 2016.7

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Event date： 2016.7

Language：English Presentation type：Oral presentation (general)

Venue：Munich Country：Germany
Estimation on two-dimensional distribution of Ti excitation temperature during Ti feedstock injection into Ar induction thermal plasma torch International conference

N. Kodama, K. Kita, Y. Ishisaka, Y. Tanaka, Y. Uesugi, T. Ishijima, S. Sueyasu, and K. Nakamura

Th 18th International Congress on Plasma Physics

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Event date： 2016.6 - 2016.7

Language：English Presentation type：Oral presentation (general)

Venue：Kaohsiung convention center Country：China
Comparison of intermittent synchronized feeding and continuous feeding of feedstock during Si nanoparticle synthesis using pulse modulated induction thermal plasmas. International conference

Yousuke Ishisaka*, Kentaro Kita, Naoto Kodama, Yasunori Tanaka, Yoshihiko Uesugi, Tatsuo Ishijima, Shiori Sueyasu, Keitaro Nakamura

13th Asia-Pacific Conference on Plasma Science and Technology (APCPST2016) 2016.5

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Event date： 2016.5

Language：English Presentation type：Oral presentation (general)

Venue：Shanghai Country：China
Silicon nanoparticles synthesized by pulse-modulated induction thermal plasmas with intermittent feedstock feeding International conference

Y.Ishisaka*, K.Kita, N.Kodama,Yasunori Tanaka, Y. Uesugi, T.Ishijima, S.Sueyasu,K.Nakamura

ISPlasma2016/ICPLANTS2016 2016.3

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Event date： 2016.3

Language：English Presentation type：Oral presentation (general)

Venue：Nagoya Country：Japan
Silicon Nanoparticle Synthesis using Pulse-Modulated Induction Thermal Plasmas with Intermittent Feedstock Feeding International conference

Yasunori Tanaka*, Yousuke Ishisaka, Kentaro Kita, Naoto Kodama, Tatsuo Ishijima, Yoshihiko Uesugi, Shiori Sueyasu, Keitaro Nakamura

APSPT-9/SPSM-28 2015.12

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Event date： 2015.12

Language：English Presentation type：Oral presentation (general)

Venue：Nagasaki Country：Japan
Two-Dimensional Spectroscopic Observation from Ar/H2 Modulated Induction Thermal Plasma for Si Nanopowder Synthesis International conference

Kentaro Kita*, Yousuke Ishisaka, Naoto Kodama, Yasunori Tanaka, Yoshihiko Uesugi, Tatsuo Ishijima, Shiori Sueyasu, Keitaro Nakamur

APSPT-9/SPSM-28 2015.12

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Event date： 2015.12

Language：English Presentation type：Oral presentation (general)

Venue：Nagasaki Country：Japan
Investigation on evaporation of Ti feedstock and formation of precursor TiO molecules during TiO₂ nanopowder synthesis in induction thermal plasma with time-controlled feedstock injection International conference

N. Kodama, K. Kita, Y. Ishisaka, Y. Tanaka, Y. Uesugi, T. Ishijima, S. Watanabe, and K. Nakamura

The 9th International Conference on Reactive Plasmas/68th Gaseous Electronics Conference/33rd Symposium on Plasma Processing

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Event date： 2015.10

Language：English Presentation type：Oral presentation (general)

Venue：Hawaii, USA Country：United States
Influence of quenching gas injection on the temperature field in pulse-modulated induction thermal plasma for large scale nanopowder synthesis International conference

Yasunori Tanaka*, Weixuan Guo, Naoto Kodama, Kentaro Kita, Yoshihiko Uesugi, Tatsuo Ishijima, Shu Watanabe, Keitaro Nakamura

GEC-68/ICRP-9/SPP-3 2015.10

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Event date： 2015.10

Language：English Presentation type：Oral presentation (general)

Venue：Honolulu Country：United States
熱プラズマによるTiO2ナノ粒子生成中のTi原子およびTiO分子生成過程の分光学的検討

兒玉直人*，北健太郎，田中康規，上杉喜彦，石島達夫，末安志織，中村圭太郎

電気学会プラズマ研究会 2015.8

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Event date： 2015.8

Language：Japanese Presentation type：Oral presentation (general)

Venue：東広島市 Country：Japan
Spectroscopic study on evaporation of Ti feedstock intermittently supplied and formation of precursor TiO in TiO2 nanopowder synthesis in the induction thermal plasma torch International conference

N. Kodama*, K. Kita, Y. Tanaka, Y. Uesugi, T. Ishijima. S. Watanabe, K. Nakamura

The 22nd International Symposium on Plasma Chemistry (ISPC-22) 2015.7

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Event date： 2015.7

Language：English Presentation type：Poster presentation

Venue：Antwerp Country：Belgium
Feedstock evaporation and precursor formation in TiO2 nanopowder synthesis processes in pulse-modulated induction thermal plasmas torch International conference

N. Kodama*, K. Kita, Y. Tanaka, Y. Uesugi, T. Ishijima. S. Watanabe, K. Nakamura

International Symposium on Advanced Plasma Science and its Application For Nitrides and Nanomater./ International Conference on Plasma-Nano Technology & Science (ISPlasma/IC-PLANTS) 2015.3

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Event date： 2015.3

Language：English Presentation type：Oral presentation (general)

Venue：Nagoya Country：Japan
TiO2ナノ粒子生成中の誘導熱プラズマトーチ内における原料粉体蒸発およびTiO分子生成過程に対する考察

兒玉直人*，北健太郎，田中康規，上杉喜彦，石島達夫，渡邊周，中村圭太郎

第62回応用物理学会春季学術講演会 2015.3

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Event date： 2015.3

Language：Japanese Presentation type：Oral presentation (general)

Venue：平塚市 Country：Japan
High Production Rate Synthesis of Fe-doped TiO2 nanopowder using Pulse-Modulated Induction Thermal Plasmas with Time-Controlled Feedstock Feeding International conference

K. Kita*, N. Kodama, Yasunori Tanaka, Y.Uesugi, T. Ishijima, S.Watanabe, K. Nakamura

12th Asia Pacific Conf. Plasma Technol. & 27th Symp.Plasma Sci. for Materials (APCPST12/SPSM27) 2014.9

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Event date： 2014.9

Language：English Presentation type：Oral presentation (general)

Venue：Adelaide Country：Australia
変調型誘導熱プラズマを用いたTiO2ナノ粒子生成時における原料粉体の連続/間歇投入時の発光スペクトル強度変化

兒玉直人*，北健太郎，田中康規，上杉喜彦，石島達夫，渡邊周，中村圭太郎

第75回応用物理学会秋季学術講演会 2014.9

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Event date： 2014.9

Language：Japanese Presentation type：Oral presentation (general)

Venue：札幌市 Country：Japan
ナノ粒子生成用Ar-O2変調誘導熱プラズマへのTi原料間歇投入時における熱プラズマトーチ部の二次元分光観測

兒玉直人*，北健太郎，田中康規，上杉喜彦，石島達夫，渡邊周，中村圭太郎

電気学会プラズマ研究会 2014.8

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Event date： 2014.8

Language：Japanese Presentation type：Oral presentation (general)

Venue：大阪市 Country：Japan
Two-dimensional spectroscopic observation in the plasma torch for the pulse-modulated induction thermal plasmas for nanopowder synthesis International conference

N. Kodama*, K. Kita, Y. Tanaka, Y. Uesugi, T. Ishijima. S. Watanabe, K. Nakamura

High Tech. Plasma Processes (HTPP-2014) 2014.7

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Event date： 2014.7

Language：English Presentation type：Poster presentation

Venue：Toulouse Country：France
Adoption of Pulse-Modulated Induction Thermal Plasmas with Time-Controlled Feedstock Feeding to High Production Rate Synthesis of Metallic Ion Doped TiO2 Nanopowder Invited International conference

Yasunori Tanaka*, N.Kodama, K.Kita, Y.Uesugi, T.Ishijima, S.Watanabe, K.Nakamura

High-Tech Plasma Processes HTTP-2014 2014.6

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Event date： 2014.6

Language：English Presentation type：Oral presentation (invited, special)

Venue：Toulouse Country：France
A Large Amount Synthesis of Fe-doped TiO2 Nanopowder using Modulated Induction Thermal Plasmas with Time-Controlled Feeding of Feedstock International conference

K. Kita*, N.Kodama, Yasunori Tanaka, Y. Uesugi, T. Ishijima, S.Watanabe, K. Nakamura

ISPlasma-IC-PLANTS2014 2014.3

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Event date： 2014.3

Language：English Presentation type：Poster presentation

Venue：Nagoya Country：Japan
Large scale synthesis of functional nanopowder using modulated induction thermal plasmas with time-controlled feedstock feeding International conference

Yasunori Tanaka*, K.Kita, N.Kodama, Y.Uesugi, T.Ishijima, S.Watanabe, K.Nakamura

4th International Round Table on Thermal Plasmas for Industrial Applications 2014.3

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Event date： 2014.3

Language：English Presentation type：Oral presentation (general)

Venue：Morroco Country：Morocco
パルス変調型誘導熱プラズマを用いたTiO2ナノ粒子生成時における熱プラズマトーチの二次元分光観測

兒玉直人*，北健太郎，田中康規，上杉喜彦，石島達夫，渡邊周，中村圭太郎

第61回応用物理学会春季学術講演会 2014.3

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Event date： 2014.3

Language：Japanese Presentation type：Oral presentation (general)

Venue：相模原市 Country：Japan
Influence of coil-current modulation for induction thermal plasmas on large amount synthesized Al-doped TiO2 nanopowde International conference

N. Kodama*, K. Kita, Y. Tanaka, Y. Uesugi, T. Ishijima. S. Watanabe, K. Nakamura

International Conference on Reactive Plasmas/ Symposium on Plasma Processing (ICRP-8/SPP-31) 2014.2

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Event date： 2014.2

Language：English Presentation type：Oral presentation (general)

Venue：Fukuoka Country：Japan
Al-doped TiO2 Nanopowder Synthesized with High Production Rate using Modulated Induction Thermal Plasmas with Intermittent Feedstock Injection International conference

Yasunori Tanaka*, N.Kodama, W. Guo, Y.Uesugi, T.Ishijima, S.Watanabe, K.Nakamura

Symp.Plasma Sci. Mater.25 2013.9

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Event date： 2013.9

Language：English Presentation type：Oral presentation (general)

Venue：Fukuoka Country：Japan
原料同期間歇供給および変動誘導熱プラズマを用いたAl-doped TiO2ナノ粒子大量合成時における粒子の評価

兒玉直人*，郭韋萱，北健太郎，田中康規，上杉喜彦，石島達夫，渡邊周，中村圭太郎

第74回応用物理学会秋季学術講演会 2013.9

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Event date： 2013.9

Language：Japanese Presentation type：Oral presentation (general)

Venue：京都市 Country：Japan
A Novel Approach for Large Amount Synthesis of TiO2 Nanopowder using Modulated Induction Thermal Plasmas with Time-Controlled Feeding of Feedstock -Effect of Quenching Gas Conditions- International conference

Yasunori Tanaka*, W. Guo, N. Kodama, Y. Uesugi, T. Ishijima, S. Watanabe, K. Nakamura

Int. Symp. Plasma Chem. ISPC-21 2013.8

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Event date： 2013.8

Language：English Presentation type：Oral presentation (general)

Venue：Cairns Country：Australia
Development of large amount synthesis of Al-doped TiO2 nanopowder using modulated induction thermal plasmas International conference

N. Kodama*, W. Guo, Y. Tanaka, Y. Uesugi, T. Ishijima. S. Watanabe, K. Nakamura

The 21st International Symposium on Plasma Chemistry (ISPC-21) 2013.8

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Event date： 2013.8

Language：English Presentation type：Poster presentation

Venue：Cairns Country：Australia
Ar-O2変調誘導熱プラズマを用いたAl-doped TiO2ナノ粒子の大量生成時におけるクエンチングガス導入効果

兒玉直人*，郭韋萱，田中康規，上杉喜彦，石島達夫，渡邊周，中村圭太郎

平成24年度電気学会全国大会 2013.3

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Event date： 2013.3

Language：Japanese Presentation type：Oral presentation (general)

Venue：名古屋大学 Country：Japan
A large amount synthesis of Al-doped TiO2 nanopowder using pulse-modulated induction thermal plasmas with time-controlled feeding of feedstock International conference

Y. Tanaka, N. Kodama*, W. Guo, Y. Uesugi, T. Ishijima. S. Watanabe, K. Nakamura

International Conference on Plasma-Nano Technology & Science (IC-PLANTS) 2013.2

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Event date： 2013.2

Language：English Presentation type：Poster presentation

Venue：Gero Country：Japan
Size Control and Heavy Rate Production Method of Nanoparticles using Modulated Induction Thermal Plasma with Time-Controlled Powder Injection International conference

Yasunori Tanaka*, W.Guo, T.Tsuke, N. Kodama, Y.Uesugi, T.Ishijima, S.Watanabe, K.Nakamura

Asia-Pacific Conf. Plasma & Technol. Symp. Plasma Sci. Mater. APCPST-11 & SPSM-25 2012.10

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Event date： 2012.10

Language：English Presentation type：Oral presentation (general)

Venue：Kyoto Country：Japan
Ar-O2変調誘導熱プラズマを用いたTiO2ナノ粒子の大量生成時におけるクエンチングガス種の影響

兒玉直人*，郭韋萱，附達也，田中康規，上杉喜彦，石島達夫，渡邊周，中村圭太郎

平成24年度電気関係学会北陸支部連合大会 2012.8

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Event date： 2012.8

Language：Japanese Presentation type：Oral presentation (general)

Venue：富山県立大学 Country：Japan

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To the head of Presentations.▲

Research Project for Joint Research, Competitive Funding, etc. 3

コンパクトで安価かつ汎用的な限流遮断器の開発

2021.10 - 2023.9

NEDO先導研究プログラム/未踏チャレンジ2050

兒玉直人

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Authorship：Principal investigator Grant type：Competitive
高圧直流遮断に適した直流ヒューズの実現に向けたヒューズ内部アークの新規消弧媒体の開発

2021.2 - 2022.3

パワーアカデミー萌芽研究(個人型)

兒玉直人

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Authorship：Principal investigator Grant type：Competitive

Grant amount：\1000000 （ Direct Cost: \1000000 ）
ヒューズボディとアーク放電間の物理的な作用を取り入れた直流限流ヒューズの開発

2020.4 - 2021.3

内藤科学技術振興財団研究助成金

兒玉直人

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Grant type：Competitive

Grant amount：\1000000 （ Direct Cost: \1000000 ）

To the head of Research Project for Joint Research, Competitive Funding, etc..▲

KAKENHI (Grants-in-Aid for Scientific Research) 2

直流ヒューズの高遮断容量化に向けた高分子と珪砂を併用したアーク限流遮断方式の開発

Grant number：21K14141 2021.4 - 2024.3

科学研究費助成事業若手研究

児玉直人

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Authorship：Principal investigator

Grant amount：\4550000 （ Direct Cost: \3500000 、 Indirect Cost：\1050000 ）

本研究では，従来からヒューズ内部のアーク消弧媒体として用いられてきた珪砂(SiO2)に加えて，高分子材料を新たに用いる。アークと固体高分子材の接触・溶発を利用することで，(1)電流路の強制的な収縮によるアーク抵抗の増加，(2)高分子蒸気によるアークの拡散，の2つの効果を融合させた革新的な小型・軽量・高遮断容量のDCヒューズを実現させる。
DC限流ヒューズの高遮断容量化は，EVなどのDC回路保護のために必須である。ヒューズの高遮断容量化のためには，事故電流の遮断過程でヒューズ内部で生じるアークの抵抗(rarc)を上昇させることや，事故電流遮断後のヒューズ両端の絶縁抵抗を高く(数MΩ以上)保つことが必要である。従来の限流ヒューズでは，rarcを高めるために珪砂が用いられてきた。
本研究では，珪砂に加えて，高分子材を併用することでrarcの上昇および高絶縁抵抗の維持が可能な手法を開発することを目的とする。
初年度は，以下を行った。
1) 銅/珪砂/高分子材混合気体の高温ガス特性計算：本研究で生じ得るアークの特性を理論計算した。その結果，銅アークに対して珪砂蒸気が混入することで，アークの抵抗率が低下することがわかった。一方で，銅/珪砂蒸気に対して光硬化性樹脂を想定した高分子蒸気が混入することで，抵抗率が上昇することがわかった。
2) ヒューズエレメント周囲への高分子材製狭隘部の配置によるDC遮断実験：銅製のヒューズエレメント周囲に光硬化性樹脂製の狭隘部付き円筒を配置し，アーク消弧実験を行った。その結果，狭隘部配置によりrarcは上昇し，絶縁抵抗も数10 MΩまで上昇する傾向が得られた。これらのrarcや絶縁抵抗は，狭隘部の形状によって変化した。rarcおよび絶縁抵抗の上昇要因として，①高分子蒸気混入によるアークの抵抗率上昇，および②高分子溶発に伴い生じたガス流によるアークの拡散が考えられる。
3) アーク電圧の非接触センサの開発：研究室内で以前から開発を進めていた電圧の非接触センサを用いてアーク電圧などの非接触測定を試みた。しかしながら，アーク由来のノイズ等の影響で，正確な測定が困難であった。測定で得られた信号に対してFFTやウェーブレット変換信号処理などを行い，S/N比を改善することで，測定精度が改善する傾向が得られた。
珪砂/銅/高分子材混合アークの高温ガス特性の計算がおおむね終了し，新規の直流アーク消弧方法開発の指針が立てられた。また，2021年度の実験により，高アーク抵抗と高絶縁抵抗を両立可能なヒューズ形状の指針を得ることができた。よって，研究は概ね順調に進呈していると考えられる。
上記の結果を踏まえ，2022年度は，1) アーク抵抗と絶縁抵抗をさらに上昇可能なヒューズエレメントおよびヒューズリンク形状の探索，2) アーク電圧の非接触センシングにおけるノイズの問題に対する，ベイズ統計を用いたノイズキャンセリングの適用，および3) ヒューズ内部現象の数値シミュレーション手法の開発を進める。以上を行うことで，ヒューズ内部現象の更なる理解や，高遮断容量化につなげる。
自動車用ヒューズ内のアークに対する粒子数密度/ガス特性の二次元分布計測法の開発

2018.8 - 2020.3

科学研究費補助金

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Authorship：Principal investigator

To the head of KAKENHI (Grants-in-Aid for Scientific Research).▲

Industrial property rights 1

ナノワイヤの製造方法

田中康規，兒玉直人，北健太郎，石坂洋輔，中村圭太郎，末安志織

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Applicant：国立大学法人金沢大学

Application no：特開2017-105680 Date applied：2015.12

Announcement no：特開2017-105680 Date announced：2017.6

Country of applicant：Domestic

To the head of Industrial property rights.▲

Teaching Experience (On-campus) 30

Automobile Engineering Laboratory I

2022
電気電子情報工学実験第2

2022
電気電子情報工学実験第1

2022
Seminar on Energy System and Environment 2E

2021
Seminar on Energy System and Environment 2A

2021
Advanced Experiments and Exercises in Electric Engineering

2021
Seminar on Energy System and Environment 1C

2021
Fundamentals of Electromagnetic Theory with Exercises

2021
Seminar on Energy System and Environment 1D

2021
Seminar on Energy System and Environment 1B

2021
Seminar on Energy System and Environment 2D

2021
Seminar on Energy System and Environment 2B

2021
電気電子情報工学実験第1

2021
電気電子情報工学実験第2

2021
Automobile Engineering Laboratory I

2021
卒業研究A

2021
卒業研究B

2021
Seminar on Energy System and Environment 1A

2021
電気電子情報工学実験第２

2020
Automobile Engineering Laboratory I

2020
電気電子情報工学実験第1

2020
卒業研究

2020
エネルギー環境システムセミナー1,2

2020
電気電子情報工学実験第1

2019
電気磁気学基礎演習

2019
物理学実験

2019
Automobile Engineering Laboratory I

2019
電気電子情報工学実験第1

2018
電気磁気学基礎演習

2018
Automobile Engineering Laboratory I

2018

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To the head of Teaching Experience (On-campus).▲

Social Contribution 4

2020年度インキュベーションホール

Role(s)：Chief editor,　Editer,　Planner,　Organizing member

2020.4 - 2021.3

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Audience： College students,　Graduate students,　Researchesrs,　Company

Type：Seminar, workshop

COVID-19感染拡大の影響により合宿形式のプラズマエレクトロニクスインキュベーションホールが中止となったため，前年度のテキストを改訂・再編纂し，プラズマ研究に関わる学生・研究者の方々に再販をした。
第13回プラズマエレクトロニクスインキュベーションホール

Role(s)：Planner,　Organizing member

2019.4 - 2020.3

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Audience： College students,　Graduate students,　Researchesrs,　General,　Company

Type：Seminar, workshop
テクノフロンティアセミナー2019

Role(s)：Organizing member

2019.4 - 2019.8

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Audience： High school students

Type：Seminar, workshop
テクノフロンティアセミナー2018

Role(s)：Planner

2018.4 - 2018.8

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Audience： High school students

Type：Seminar, workshop

To the head of Social Contribution.▲