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High-spatial-resolution measurement of magnetization distribution using polarized neutron imaging

Sasada, S; Hiroi, K; Osanai, K; Shinohara, T; Watanabe, K; Uritani, A

JAPANESE JOURNAL OF APPLIED PHYSICS 60 巻 ( 12 ) 頁： 126003-1 - 126003-6 2021年12月

クルックス管実験に用いられる誘導コイルを利用した理科実験査読有り

森千鶴夫、瓜谷章、神谷均、佐合穣、臼井俊哉

日本放射線安全管理学会誌 20 巻 ( 2 ) 頁： 45 - 51 2021年12月

Benchmark Calculation of d-Li Thick Target Neutron Yield by JENDL/DEU-2020 for IFMIF and Similar Facilities

Nishitani, T; Yoshihashi, S; Kumagai, K; Kondo, K; Uritani, A

PLASMA AND FUSION RESEARCH 16 巻 2021年11月

Feasibility Study of the One-Dimensional Radiation Distribution Sensing Method Using an Optical Fiber Sensor Based on Wavelength Spectrum Unfolding

Terasaka, Y; Watanabe, K; Uritani, A; Yamazaki, A; Sato, Y; Torii, T; Wakaida, I

JOURNAL OF NUCLEAR ENGINEERING AND RADIATION SCIENCE 7 巻 ( 4 ) 頁： 042002-1 - 042002-7 2021年10月

名古屋大学におけるBNCT用加速器中性子源の開発招待有り

土田一輝、瓜谷章、鬼柳善明、西谷建夫、吉橋幸子、渡辺賢一、山﨑淳、本田祥梧、辻義之、恒吉達也

Isotope News 777 巻頁： 6 - 11 2021年10月

Evaluation of a one-dimensional position-sensitive quartz optical fiber sensor based on the time-of-flight method for high radiation dose rate applications

Terasaka, Y; Watanabe, K; Uritani, A

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT 996 巻 2021年4月

High heat removal technique for a lithium neutron generation target used for an accelerator-driven BNCT system

Yoshihashi, S; Tsuneyoshi, T; Tsuchida, K; Furuzawa, D; Honda, S; Watanabe, K; Yamazaki, A; Tsuji, Y; Hamaji, Y; Tokitani, M; Tamura, H; Sagara, A; Kiyanagi, Y; Uritani, A

JOURNAL OF INSTRUMENTATION 16 巻 ( 4 ) 頁： P04016 2021年4月

First experimental verification of the neutron field of Nagoya University Accelerator-driven neutron source for boron neutron capture therapy

Watanabe, K; Yoshihashi, S; Ishikawa, A; Honda, S; Yamazaki, A; Tsurita, Y; Uritani, A; Tsuchida, K; Kiyanagi, Y

APPLIED RADIATION AND ISOTOPES 168 巻 2021年2月

Thermal neutron measurement by single crystal CVD diamond detector applied with the pulse shape discrimination during deuterium plasma experiment in LHD 査読有り

Kobayashi, MI; Angelone, M; Yoshihashi, S; Ogawa, K; Isobe, M; Nishitani, T; Sangaroon, S; Kamio, S; Fujiwara, Y; Tsubouchi, T; Uritani, A; Sakama, M; Osakabe, M

FUSION ENGINEERING AND DESIGN 161 巻頁： 112063 2020年12月

Response evaluation of a compact and highly efficient neutron diffractometer for compact accelerator neutron sources 招待有り

Sho Imai, Kenichi Watanabe, Astushi Yamazaki, Sachiko Yoshihashi, Akira Uritani, Seiji Tasaki, Setsuo Satoh

Radiation Protection 40 巻 ( 6 ) 頁： 540 - 544 2020年11月

Observation of neutron emission anisotropy by neutron activation measurement in beam-injected LHD deuterium plasmas 査読有り

Sugiyama, S; Nishitani, T; Matsuura, H; Isobe, M; Ogawa, K; Tanaka, T; Yoshihashi, S; Uritani, A; Osakabe, M

NUCLEAR FUSION 60 巻 ( 7 ) 2020年7月

Development of Optical-fiber-based Neutron Detector Using Li-glass Scintillator for an Intense Neutron Field 査読有り

Akihisa Ishikawa, Atsushi Yamazaki, Kenichi Watanabe, Sachiko Yoshihashi, Akira Uritani, Yoshinori Sakurai, Hiroki Tanaka, Ryo Ogawara, Mitsuru Suda, and Tsuyoshi Hamano

Sensors and Materials 32 巻 ( 4 ) 頁： 1489-1495 2020年4月

記述言語：英語掲載種別：研究論文（学術雑誌）

The development of a neutron detector for real-time measurements in an intense neutron field is desired. We are developing a quartz optical-fiber-based neutron detector as a real-time neutron monitor. Thus far, Eu:LiCaAlF6 crystals and LiF/Eu:CaF2 eutectics were used as the scintillators of the quartz optical-fiber-based neutron detectors. These scintillators have high light yields, but relatively long decay time constants, which are limitation factors of the dynamic range of optical-fiber-based neutron detectors. In this paper, we applied a small Li-glass scintillator to a quartz optical-fiber-based neutron detector using an optical fiber with high numerical aperture (NA) and a UV-curable resin with high transmittance. The fabricated detector showed a clear peak corresponding to neutron events in the pulse height distribution. The radiation resistance was evaluated and no deterioration was observed up to 2×1012 n/cm2. The detector output linearity was confirmed up to 450 kcps, which was about ten times larger than that of the detector using the conventional Eu:LiCaAlF6 or LiF/Eu:CaF2 scintillator.

DOI： doi.org/10.18494/SAM.2020.2748

A comparison between simulation and experimental results for depth profile of 6Li reaction rate in a water phantom of BNCT using a small 6Li-based scintillator neutron detector with an optical fiber 査読有り

Ishikawa, A; Yamazaki, A; Watanabe, K; Yoshihashi, S; Uritani, A; Tsurita, Y; Tsuchida, K; Kiyanagi, Y

RADIATION MEASUREMENTS 133 巻 2020年4月

Design and Construction of an Imaging beamline at the Nagoya University Neutron Source 査読有り

Katsuya Hirota, Shogo Awano, Takuhiro Fujiie, Seiso Fukumura, Mayu Hishida, Go Ichikawa,, Sohei Imajo, Ikuya Itoh, Yoshihisa Iwashita, Masaaki Kitaguchi, Yoshiaki Kiyanagi, Yasutoshi Kuriyama, Koki Morikawa, Yu-dai Niinomi, Hirohiko M. Shimizu, Kazuki Tsuchida, Yusuke Tsuchikwa, Yukio Tsurita, Akira Uritani, Kenichi Watanabe, Yutaka Yamagata, Nana Yamamoto, Atsushi Yamazaki, Sachiko Yoshihashi and Tamaki Yoshioka

EPJ Web Conf. 231 巻頁： 05002 2020年3月

記述言語：英語掲載種別：研究論文（学術雑誌）

The Nagoya University Accelerator driven Neutron Source (NUANS) is constructed at the main campus of the Nagoya University. The electrostatic accelerator is used with the maximum proton energy and intensity of 2.8MeV, 15mA(42kW) respectively. Two neutron beamlines are designed at NUANS. The BL1 is dedicated to BNCT development. The BL2 is designed for research and development for neutron devices and neutron imaging. The neutrons used for the BL2 are generated by using the (p, n) reaction from a thin beryllium target. We constructed a compact target station for the BL2 and measured the neutron transmission image.

DOI： 10.1051/epjconf/202023105002

Sensitivity and linearity of optical fiber-based neutron detectors using small 6Li-based scintillators

Ishikawa, A; Yamazaki, A; Watanabe, K; Yoshihashi, S; Uritani, A; Fukuda, K; Koike, A; Ogawara, R; Suda, M; Hamano, T

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT 954 巻頁： 161661-1 - 161661-5 2020年2月

Basic study on a LiF-Eu:CaF2 mixed powder neutron scintillator

Watanabe, K; Mitsuboshi, N; Ishikawa, A; Yamazaki, A; Yoshihashi, S; Uritani, A; Kawaguchi, N; Yanagida, T; Fukuda, K

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT 954 巻 2020年2月

箔検電器によるクルックス管からのX 線の線量率測定査読有り

森千鶴夫，緒方良至，秋吉優史，臼井俊哉，村上浩介，羽澄大介，中村嘉行，渡辺賢一，瓜谷章，神谷均，佐合穣，宮川俊晴，田中隆一，掛布智久，森山正樹

69 巻頁： 1-12 2020年1月

記述言語：日本語掲載種別：研究論文（学術雑誌）

高等学校などで使用されているクルックス管は，一般的に漏洩Ｘ線を発生している。Ｘ線の線量率の測定に，これらの学校が保有している箔検電器を使う方法を提案した。箔検電器の箔の開き角は電極に与えられた電位に依存して変化する。この電位はＸ線によって空気中に作られたイオンを集めて減少し箔は閉じて行く。しかし，空気中のイオン密度は周辺の電位や風，および箔検電器に荷電する電荷の正負の影響も受ける。正電荷を荷電した場合に箔が閉じる時間と負電荷を荷電した場合のそれとの幾何平均値をとることによって，電離箱で測定した線量率との間に再現性のある関係を得ることができた。この関係を校正線と呼ぶが，他の同様の市販の箔検電器にも適用できる。

DOI： 0.3769/radioisotopes.69.1

Development of Optical-fiber-based Neutron Detector Using Li glass Scintillator for an Intense Neutron Field

Ishikawa, A; Yamazaki, A; Watanabe, K; Yoshihashi, S; Uritani, A; Sakurai, Y; Tanaka, H; Ogawara, R; Suda, M; Hamano, T

SENSORS AND MATERIALS 32 巻 ( 4 ) 頁： 1489 - 1495 2020年

Measurement of Thermal and Epithermal Neutron Flux Distribution in the Torus Hall of LHD using Activation Method in the First Deuterium Experiment Campaign 査読有り

Tomoyo TANAKA, Makoto KOBAYASHI, Sachiko YOSHIHASHI, Akira URITANI, Kenichi WATANABE, Atsushi YAMAZAKI, Takeo NISHITANI, Kunihiro OGAWA and Mitsutaka ISOBE

Plasma and Fusion Research 14 巻頁： 3405162-1 - 3405162-4 2019年11月

記述言語：英語掲載種別：研究論文（学術雑誌）

In the Large Helical Device (LHD) of the National Institute for Fusion Science, a deuterium plasma experiment was performed in March 2017. Neutrons with an energy of 2.45 MeV are generated by d (d, n) 3He reactions. The evaluation of this neutron flux in the torus hall, as well as within the LHD vessel, is very important for the decommissioning of the LHD in the future and the radiation shielding for workers and components around the LHD. In this study, we evaluate the spatial distribution of thermal and epithermal neutron flux on the floor level of the LHD torus hall by measuring the neutron activation of gold foils. The flux information obtained in the experiment can be used for the evaluation of radio-activation and the shielding design.

DOI： 10.1585/pfr.14.340516

Pulsed Neutron Imaging Based Crystallographic Structure Study of a Japanese Sword made by Sukemasa in the Muromachi Period 査読有り

Kenichi Oikawa, Yoshiaki Kiyanagi, Hirotaka Sato, Kazuma Ohmae, Anh Hoang Pham, Kenichi Watanabe, Yoshihiro Matsumoto, Takenao Shinohara, Tetsuya Kai, Stefanus Harjo, Masato Ohnuma, k, Sigekazu Morito, Takuya Ohba, Akira Uritani, Masakazu Ito

Neutron Radiography WCNR-11 頁： 207-213 2019年10月

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