Faculty Profiles - YAMAZAKI, Atsushi

写真a

YAMAZAKI, Atsushi

Organization

Graduate School of Engineering Applied Energy 2 Assistant Professor

Graduate School

Graduate School of Engineering

Undergraduate School

School of Engineering Energy Science and Engineering

Degree 1

Doctor of Philosophy in Science （ 2006.5 Kyoto University ）

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Research Interests 2

レーザー加速
レーザー加速

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Research Areas 2

Others / Others / Plasma Science
Others / Others / Atomic/Molecular/Quantum Electronics/Plasma

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Current Research Project and SDGs 4

高強度レーザーによる陽子加速
外部磁場印可によるレーザープラズマ相互作用による電子ビーム発生の安定化
超短パルス高強度レーザーを用いたレーザープラズマ相互作用による準単色電子ビーム発生
電子蓄積リングの電子ビームを用いた逆コンプトン散乱によるX線発生

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Research History 4

Assistant professor, Department of Materials, Physics and Energy Engineering, Nagoya University

2009.11

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Country：Japan
名古屋市技術職員(医学物理)

2009.4 - 2009.10

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Country：Japan
Assistant professor, Nuclear Professional School, School of Engineering, University of Tokyo

2007.4 - 2009.3

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Country：Japan
Research associate, Nuclear Professional School, School of Engineering, University of Tokyo

2006.6 - 2007.3

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Country：Japan

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Education 2

Kyoto University Graduate School of Science Division of Physics and Astronomy

2003.4 - 2006.5

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Country： Japan
Nagoya University Faculty of Science Department of Physics

1996.4 - 2000.3

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Country： Japan

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Professional Memberships 2

日本物理学会
応用物理学会

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Papers 59

Neutron/y-ray discrimination based on the property and thickness controls of scintillators using Li glass and LiCAF (Ce) in a y-ray field

Kaburagi Masaaki, Shimazoe Kenji, Terasaka Yuta, Tomita Hideki, Yoshihashi Sachiko, Yamazaki Atsushi, Uritani Akira, Takahashi Hiroyuki

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT Vol. 1046 2023.1

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DOI： 10.1016/j.nima.2022.112976

Web of Science
Neutron/γ-ray discrimination based on the property and thickness controls of scintillators using Li glass and LiCAF (Ce) in a γ-ray field

Kaburagi M., Shimazoe K., Terasaka Y., Tomita H., Yoshihashi S., Yamazaki A., Uritani A., Takahashi H.

Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment Vol. 1046 2023.1

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Publisher：Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

Recently, various neutron detectors, such as scintillation detectors, are being developed as alternatives to 3He proportional counters. Here we focus on the thickness and property controls of inorganic scintillators used for thermal neutron detection in intense γ-ray fields without considering pulse shape discrimination (PSD) techniques. GS20TM (a lithium glass) and LiCaAlF6 crystals activated with Ce (LiCAF:Ce) scintillators with thicknesses of 0.5 and 1.0 mm, respectively, have been employed because they have faster decay times than other inorganic scintillators. Pulse signals generated by photomultiplier tubes, to which the scintillators were coupled, were inserted into a digital pulse processing unit with a sampling rate of 1 GHz, and the areas of waveforms were integrated for 360 ns. Neutron/γ-ray detections and discriminations were performed via pulse integrations without using PSD techniques. For GS20TM, the relative energy resolution values of the thermal neutron peaks were 11% and 12% in 0.5 mm and 1.0 mm thicknesses, respectively, and those for LiCAF:Ce were 18% and 36% in 0.5 mm and 1.0 mm thicknesses, respectively. In a 60Co γ-ray field, the neutron detection for GS20TM in a 0.5 mm thickness was possible at dose rates of up to 0.919 Gy/h; however, for LiCAF:Ce, neutron detection was possible at 0.473 Gy/h, and it failed at 0.709 Gy/h. The neutron/γ-ray discrimination of GS20TM was better than that of LiCAF:Ce due to its better energy resolution and higher detection efficiency (6Li content).

DOI： 10.1016/j.nima.2022.167636

Scopus
Evaluation of heat removal performance of a sealed Li target for an accelerator-driven neutron source of Boron Neutron Capture Therapy at Nagoya University Reviewed

Honda, S; Yoshihashi, S; Hamaji, Y; Shen, JJ; Tsuchida, K; Nishitani, T; Kiyanagi, Y; Tsurita, Y; Watanabe, K; Yamazaki, A; Uritani, A

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT Vol. 1042 2022.11

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Language：English Publishing type：Research paper (scientific journal) Publisher：Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

An accelerator-driven neutron source has been developed in Nagoya University for boron neutron capture therapy using a new concept of thick lithium (Li) target in which protons are stopped in a Li layer. A sealed Li target developed consists of a Li sheet placed on a copper (Cu) base plate equipped with water-cooled channels and a titanium (Ti) foil seal to cover Li surface. The proton beam injected into the target is produced through the proton–Dynamitron accelerator (IBA) with a maximum energy of 2.8 MeV and a current of 15 mA. The results of our previous study confirmed that the target was not damaged when irradiated with an acceleration energy of 1.8 MeV and a current of 0.5 mA (heat input of 4.6 MW/m2). To keep the soundness of the target up to 6–7 MW/m2, it is considered to be essential to improve the bonding between the Ti foil and Li interface, which will contribute the heat removal. It was suggested from our previous experiences that the bonding property may be improved by forming a Cu–Li alloy at the Ti–Li interface. In this paper, we evaluate the heat removal performance of a sealed Li target with Cu–Li alloy formation to improve the target durability. The sealed Li target was produced using a “Cu-coated pure Ti foil”, in which Cu was deposited on the surface of a Ti foil with a thickness of 0.2μm. The use of Cu-coated pure Ti foil actively forms Cu–Li alloys at the Ti–Li interface. For comparison, sealed Li targets were produced with pure Ti foil, and irradiation tests were conducted on each target. The heat removal performance was evaluated by electron beam irradiation using the active cooling teststand 2 (ACT2), a high heat flux test facility, and proton beam irradiation using the Dynamitron accelerator. We obtain a result that the Cu-coated pure Ti foil-sealed Li target has a heat removal capacity of 11 MW/m2, about five times higher than that of the pure Ti foil-sealed Li target. This confirmed that the Cu–Li alloy contributed to the improvement of the heat removal performance. For the proton beam irradiation test, a Cu-coated pure Ti foil target was produced and irradiated for 26 h at an acceleration energy of 1.8 MeV and an average current of 3.5 mA, where no neutrons were generated. The tests confirmed that the Cu-coated pure Ti foil target could withstand 26 h of irradiation at a heat input of 9.0 MW/m2. About anticipated degradation of the heat removal performance due to stopping the protons in the Li layer, no change was observed during this long irradiation test, in which 2.15 × 1024 protons were injected into the Li layer. Although further long-time irradiation test will be needed in the future, at present we have confirmed that there is no problem with stopping protons in the Li layer.

DOI： 10.1016/j.nima.2022.167414

Web of Science

Scopus
Development of a Sealed Li target as an accelerator-driven neutron source for Boron neutron capture therapy at Nagoya University Reviewed

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

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT Vol. 1040 2022.10

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Language：English Publishing type：Research paper (scientific journal) Publisher：Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

Nagoya University is developing a Sealed lithium (Li) target based on a new concept for an accelerator-driven neutron source for Boron neutron capture therapy. The Sealed Li target is a thick Li target with the new concept of sealing Li with Ti foil and stopping protons within Li. The incident proton beam on the target is generated by the Proton-dynamitron (IBA) accelerator and has a maximum energy of 2.8 MeV and a current of 15 mA (heat input of 6.6 MW/m2). In this paper, a test sample made with a small amount of Li was prepared to evaluate the performance of the Sealed Li target. We called the test target. When irradiated with a heat input of 4.6 MW/m2, the Ti foil on the surface of the test target was not damaged, although some Li melted and a dent with the same shape as the beam diameter was formed. Furthermore, the heat removal performance of the test target was evaluated using simulation software and the finite element method. The maximum temperature of the target surface was 144.4 °C when a heat input of 5.0 MW/m2 was calculated. Assuming that the bondability between Ti foil and Li is poor, the calculation was carried out by simulating the presence of cavities at the Ti foil–Li interface. As a result, we suggested that the presence of than 2 mm diameter cavity at the interface between Ti foil and Li would melt the Ti foil and damage the target. In order to obtain the ideal result, it was necessary to further improve the adhesion between Ti foil and Li, but we were able to confirm the performance of the sealed Li target with a new concept.

DOI： 10.1016/j.nima.2022.167140

Web of Science

Scopus
Neutronics Analyses of the Radiation Field at the Accelerator-Based Neutron Source of Nagoya University for the BNCT Study

Nishitani, T; Yoshihashi, S; Tanagami, Y; Tsuchida, K; Honda, S; Yamazaki, A; Watanabe, K; Kiyanagi, Y; Uritani, A

JOURNAL OF NUCLEAR ENGINEERING Vol. 3 ( 3 ) page： 222 - 232 2022.9

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DOI： 10.3390/jne3030012

Web of Science
Evaluation of Induced Radioactivity Generated during LHD Deuterium Plasma Experiments

YOSHIHASHI Sachiko, YAMADA Hayato, KOBAYASHI Makoto, NISHITANI Takeo, YAMAZAKI Atsushi, ISOBE Mitsutaka, OGAWA Kunihiro, URITANI Akira

Plasma and Fusion Research Vol. 17 ( 0 ) page： 2405096 - 2405096 2022.8

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Language：English Publishing type：Research paper (scientific journal) Publisher：The Japan Society of Plasma Science and Nuclear Fusion Research

Neutrons are generated in a fusion plasma and induce various radionuclides via a nuclear reaction with fusion reactor materials. Evaluating the kinds of nuclide and the amount of induced radioactivity is important for decommissioning planning and regular maintenance. In this study, we verified a long-term prediction model of induced radioactivity in the large helical device (LHD) model by comparing induced radioactivity generated during deuterium plasma experiments in LHD with results calculated using a high-energy particle-induced radioactivity code. The metals employed for activation were SUS316L, Co, Mo, and Ni. During the deuterium plasma experiments, these materials were placed on an 8-O port of the LHD, and the induced radioactivity was measured weekly. To computed induced radioactivity using DCHAIN-SP, the neutron energy spectrum was computed using the LHD model with the Monte-Carlo simulation code PHITS. Although the calculated and measured radioactivity of 58Co and 54Mo agreed well, the calculated values of 60Co and 99Mo were underestimated. However,low-energy components could be improved by incorporating peripheral devices into the LHD model, resulting in more accurate radioactivity predictions.

DOI： 10.1585/pfr.17.2405096

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Scopus

CiNii Research
Neutron yield calculation of p-Li thick target by using PHITS with JENDL-4.0/HE and ENDF/B-VII for BNCT application Reviewed

Nishitani Takeo, Tanagami Yuuki, Yoshihashi Sachiko, Tsuchida Kazuki, Yamazaki Atsushi, Uritani Akira

JOURNAL OF NUCLEAR SCIENCE AND TECHNOLOGY Vol. 59 ( 5 ) page： 605 - 613 2022.5

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

DOI： 10.1080/00223131.2021.1996297

Web of Science

Scopus
Evaluation of the thermal neutron sensitivity, output linearity, and gamma-ray response of optical fiber-based neutron detectors using Li-glass scintillator

Ishikawa, A; Watanabe, K; Yamazaki, A; Yoshihashi, S; Imai, S; Masuda, A; Matsumoto, T; Tanaka, H; Sakurai, Y; Nogami, M; Hitomi, K; Uritani, A; Harano, H

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT Vol. 1025 2022.2

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Language：Japanese Publisher：Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

An optical fiber-based neutron detector can be used as a real-time neutron monitor for an intense neutron field. In this study, optical fiber-based neutron detectors were fabricated using Li-glass scintillator. The thermal neutron sensitivity, upper limit of the output linearity, and response to gamma rays from 60Co and Cd were evaluated. The thermal neutron sensitivity was proportional to the mass of the Li-glass scintillator, and the calibration factor was 2.06 × 10−6 and 3.18 × 10−6 cps/(n/cm 2/s)/μg for the lower-level discrimination of the peak and valley channel, respectively. The detector output linearity was confirmed to be up to nearly 2 Mcps. While evaluating the response to gamma rays, for both 60Co and Cd, the gamma-ray counting rate was found to be smaller than the uncertainty associated with counting statistics in most expected applications where the neutron counting rate was >1 kcps.

DOI： 10.1016/j.nima.2021.166074

Web of Science

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

Terasaka Yuta, Watanabe Kenichi, Uritani Akira, Yamazaki Atsushi, Sato Yuki, Torii Tatsuo, Wakaida Ikuo

JOURNAL OF NUCLEAR ENGINEERING AND RADIATION SCIENCE Vol. 7 ( 4 ) 2021.10

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Language：English

DOI： 10.1115/1.4048841

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

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 Vol. 16 ( 4 ) 2021.4

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Language：English

DOI： 10.1088/1748-0221/16/04/P04016

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Scopus
Gamma-ray Dosimetry in the BNCT Irradiation Field Using BeO Optically Stimulated Luminescence Dosimeter

Watanabe Kenichi, Nakamura Satoru, Nagasaka Kosei, Yamazaki Atsushi, Yoshihashi Sachiko, Uritani Akira

JSAP Annual Meetings Extended Abstracts Vol. 2021.1 ( 0 ) page： 576 - 576 2021.2

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Language：Japanese Publisher：The Japan Society of Applied Physics

DOI： 10.11470/jsapmeeting.2021.1.0_576

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

Watanabe Kenichi, Yoshihashi Sachiko, Ishikawa Akihisa, Honda Shogo, Yamazaki Atsushi, Tsurita Yukio, Uritani Akira, Tsuchida Kazuki, Kiyanagi Yoshiaki

Applied Radiation and Isotopes Vol. 168 page： 109553 2021.2

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Language：English

As the commissioning phase of the Nagoya University Accelerator-driven Neutron Source for boron neutron capture therapy, in-phantom thermal neutron flux measurements were conducted using a small ^<6>LiF/Eu:CaF_2 scintillator detector and activation foils. The spatial distribution of the measured thermal neutron flux agreed with the Monte Carlo simulation results. Based on this comparison, the free-in-air neutron spectrum, calculated at the exit aperture, was verified and the epithermal neutron flux, at a 0.25 mA proton current, was evaluated as (1.49±0.10)×10^<7> n/(c㎡ s).

DOI： 10.1016/j.apradiso.2020.109553

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Scopus

PubMed

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

Ishikawa Akihisa, Yamazaki Atsushi, Watanabe Kenichi, Yoshihashi Sachiko, Uritani Akira, Tsurita Yukio, Tsuchida Kazuki, Kiyanagi Yoshiaki

RADIATION MEASUREMENTS Vol. 133 2020.4

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Language：Japanese

DOI： 10.1016/j.radmeas.2020.106270

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Scopus
Output linearity and radiation resistance of an optical fiber-based neutron detector using Li-glass scintillator

Ishikawa Akihisa, Yamazaki Atsushi, Watanabe Kenichi, Yoshihashi Sachiko, Uritani Akira

JSAP Annual Meetings Extended Abstracts Vol. 2020.1 ( 0 ) page： 555 - 555 2020.2

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Language：Japanese Publisher：The Japan Society of Applied Physics

DOI： 10.11470/jsapmeeting.2020.1.0_555

CiNii Research
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 Vol. 954 2020.2

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Language：Japanese Publisher：Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

We developed a mixed powder neutron scintillator as a novel neutron detection material. Since LiF-Ag:ZnS mixed powder, which is a widely used mixed powder neutron scintillator, is opaque owing to the extremely high refractive index of Ag:ZnS, the scintillator thickness is limited. We proposed the use of LiF-Eu:CaF2 mixed powder, where both LiF and Eu:CaF2 have almost the same refractive index, as a roughly transparent mixed powder neutron scintillator. Although the just mixed LiF-Eu:CaF2 powder is opaque, it can become translucent by filling the gap in the powder with a liquid glass resin as a refractive index buffer. As a result, we observe a peak shape in the pulse height spectrum obtained from the LiF-Eu:CaF2 mixed powder scintillator when irradiating thermal neutrons.

DOI： 10.1016/j.nima.2018.09.079

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Scopus
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 Vol. 954 2020.2

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Language：Japanese Publisher：Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

We developed optical fiber-based neutron detectors that use small pieces of6Li-based scintillators, namely, Eu:LiCaAlF6 crystals and LiF/Eu:CaF2 eutectics. Considering that these elements have high light yields (more than 10,000 photons/neutron), they can produce pulse height spectra with clear peaks even when using optical fiber light guides. To adjust the neutron sensitivity, we controlled the amount of6Li in the scintillator. We fabricated three different detectors using Eu:LiCaAlF6 and LiF/Eu:CaF2 with various amounts of6Li and then evaluated the neutron sensitivity of each detector. This approach confirmed that there was a linear relationship between the neutron sensitivity and amount of6Li, thus implying that the6Li mass measured by a high-precision balance could be a good metric of neutron sensitivity. We also checked the linearity of the output of the detector at relatively high neutron fluxes by using an accelerator-based neutron source. Although the detectors showed saturation behavior at high count rate, we were able to cover a relatively wide dynamic range by combining multiple detectors using different amounts of6Li. After correcting for the pulse height distortion and count loss due to pile-up events, we were able to confirm the linearity of the detectors up to a count rates of 100 kcps.

DOI： 10.1016/j.nima.2018.11.120

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Scopus
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 Vol. 32 ( 4 ) page： 1489 - 1495 2020

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Language：Japanese Publisher：Sensors and Materials

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 have been 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 the limiting factors for the dynamic range of optical-fiber-based neutron detectors. In this work, we applied a small Li glass scintillator to a quartz optical-fiber-based neutron detector using an optical fiber with high numerical aperture 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： 10.18494/SAM.2020.2748

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Scopus
Crystal quality evaluation of TlBr by wavelength-resolved neutron imaging

Watanabe Kenichi, Matsumoto Kio, Hitomi Keitaro, Nogami Mitsuhiro, Yamazaki Atsushi, Yoshihashi Sachiko, Uritani Akira

JSAP Annual Meetings Extended Abstracts Vol. 2019.2 ( 0 ) page： 519 - 519 2019.9

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Language：Japanese Publisher：The Japan Society of Applied Physics

DOI： 10.11470/jsapmeeting.2019.2.0_519

CiNii Research
Measurement of neutron spectrum using activation method in deuterium plasma experiment at LHD

Tanaka, T; Yoshihashi, S; Kobayashi, M; Uritani, A; Watanabe, K; Yamazaki, A; Nishitani, T; Ogawa, K; Isobe, M

FUSION ENGINEERING AND DESIGN Vol. 146 page： 496 - 499 2019.9

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Language：Japanese Publisher：Fusion Engineering and Design

In the Large Helical Device (LHD) of the National Institute for Fusion Science, the experiments using deuterium plasma were performed from March 2017. Neutrons with the energy of 2.45 MeV are generated by d (d, n) 3He reactions. The evaluation of the neutron flux in the torus hall as well as the LHD vessel is very important for designing the decommissioning of the LHD in the future, and the radiation shielding for workers and components around LHD. In this study, we performed the activation experiments using multiple activation foils to obtain a neutron spectrum in the vacuum vessel of the LHD. The reaction rate of each activation foil was generally consistent with the calculation result by MCNP6. As a result of the unfolding with SAND-II code, we experimentally obtained the neutron spectrum in the vacuum vessel of the LHD for the first time.

DOI： 10.1016/j.fusengdes.2019.01.005

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Scopus
Improvement of the single edge fitting mode in the Bragg edge analysis code RITS

Ohmae Kazuma, Watanabe Kenichi, Uritani Akira, Yamazaki Atsushi, Yoshihashi Sachiko, Kiyanagi Yoshiaki, Sato Hirotaka

JSAP Annual Meetings Extended Abstracts Vol. 2019.1 ( 0 ) page： 561 - 561 2019.2

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Language：Japanese Publisher：The Japan Society of Applied Physics

DOI： 10.11470/jsapmeeting.2019.1.0_561

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Measurement of BNCT Neutron Field Using Optical Fiber-Based Neutron Detector

Ishikawa Akihisa, Yamazaki Atsushi, Watanabe Kenichi, Yoshihashi Sachiko, Uritani Akira, Tsurita Yukio, Tsuchida Kazuki, Kiyanagi Yoshiaki

JSAP Annual Meetings Extended Abstracts Vol. 2019.1 ( 0 ) page： 526 - 526 2019.2

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Language：Japanese Publisher：The Japan Society of Applied Physics

DOI： 10.11470/jsapmeeting.2019.1.0_526

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Basic evaluation of the Eu:BaFBr and Ce:CaF2 hybrid type optical fiber based dosimeter system for correction of quenching effect under carbon ion irradiation

Hirata Yuho, Watanabe Kenichi, Yamazaki Atsushi, Yoshihashi Sachiko, Uritani Akira, Koba Yusuke, Matsufuji Naruhiro, Yanagida Takayuki, Fukuda Kentaro

Progress in Nuclear Science and Technology Vol. 6 ( 0 ) page： 238 - 242 2019.1

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Language：English Publisher：Atomic Energy Society of Japan

We fabricated the hybrid type optical fiber based dosimeter system using Eu:BaFBr and Ce:CaF2 optically stimulated luminescence (OSL) materials in order to correct the quenching effect under high LET particle irradiation. The fabricated dosimeter probe can obtain signals from both OSL materials through one optical fiber. We investigated the probe response by irradiating it with mono-energetic carbon ions and broad-spectrum ones making the spread-out Bragg peak (SOBP). We demonstrated that the SOBP shape can be improved by correction of the quenching effect using the relationship between the luminescence efficiency and the signal intensity ratio of both OSL materials.

DOI： 10.15669/pnst.6.238

CiNii Research
Response evaluation of Onion-like single Bonner sphere neutron spectrometer using TRUST Eu:LiCAF scintillator

Watanabe Kenichi, Mizukoshi Tomoaki, Yamazaki Atsushi, Yoshihashi Sachiko, Uritani Akira, Iguchi Tetsuo, Ogata Tomohiro, Muramatsu Takashi, Matsumoto Tetsuro, Masuda Akihiko

Progress in Nuclear Science and Technology Vol. 6 ( 0 ) page： 122 - 125 2019.1

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Language：English Publisher：Atomic Energy Society of Japan

We have developed the single sphere neutron spectrometer with five sensitive layers using the TRUST Eu:LiCAF scintillator and the WLSF readout. We evaluated the energy dependence of the detector response at thermal neutron and 24 keV, 144 keV, 565 keV, 5MeV and 14.8 MeV mono-energetic neutron irradiation fields. The experimentally determined neutron sensitivities are consistent with the Monte Carlo calculations. The detector responses for a bare and a heavy-water moderated 252Cf sources also show good agreement with the expected ones using the Monte Carlo calculations.

DOI： 10.15669/pnst.6.122

CiNii Research
Development of wide one-dimensional X-ray line sensor in backscatter X-ray imaging system for infrastructure inspection

Ohashi Kazuya, Watanabe Kenichi, Yamazaki Atsushi, Uritani Akira, Toyokawa Hiroyuki, Fujiwara Takeshi, Mandai Shinichi, Isa Hidenori

Progress in Nuclear Science and Technology Vol. 6 ( 0 ) page： 208 - 211 2019.1

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Language：English Publisher：Atomic Energy Society of Japan

We fabricated a wide one-dimensional X-ray line sensor in backscatter X-ray imaging system. The length and width of the sensitive area of our line sensor is 200 mm and 50 mm, respectively. By using fan-beam X-rays and scanning in the perpendicular direction to the fan-beam plane, two-dimensional backscatter X-ray images can be obtained. In basic experiments, we confirmed that an iron rod placed at the depth of, at least, 9 cm in a concrete brock can be seen by combining our line sensor and C-band linac X-ray generator.

DOI： 10.15669/pnst.6.208

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

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

Plasma and Fusion Research Vol. 14 ( 0 ) page： 3405162 - 3405162 2019

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Language：English Publisher：The Japan Society of Plasma Science and Nuclear Fusion Research

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.14.3405162

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Scopus

CiNii Research
Performance improvement of a backscattering X-ray imaging detector for non-destructive inspection of concrete structures

Watanabe Kenichi, Ohashi Kazuya, Yamazaki Atsushi, Uritani Akira, Toyokawa Hiroyuki, Fujiwara Takeshi, Mandai Shinichi, Isa Hidenori

JSAP Annual Meetings Extended Abstracts Vol. 2018.1 ( 0 ) page： 647 - 647 2018.3

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Language：Japanese Publisher：The Japan Society of Applied Physics

DOI： 10.11470/jsapmeeting.2018.1.0_647

CiNii Research
Correction of quenching effect of a small size OSL dosimeter using Eu:BaFBr and Ce:CaF2

Hirata Yuho, Watanabe Kenichi, Uritani Akira, Yamazaki Atsushi, Koba Yusuke, Matsufuji Naruhiro, Yanagida Takayuki, Fukuda Kentaro

RADIATION MEASUREMENTS Vol. 106 page： 246 - 251 2017.11

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DOI： 10.1016/j.radmeas.2017.03.043

Web of Science

Scopus
Study of the correction method for quenching effects of a small size dosimeter using an optical fiber and optically stimulated luminescence

Hirata Yuho, Yamazaki Atsushi, Watanabe Kenichi, Yoshihashi Sachiko, Uritani Akira, Koba Yusuke, Matsufuji Naruhiro, Toshito Toshiyuki, Yanagida Takayuki

JSAP Annual Meetings Extended Abstracts Vol. 2017.2 ( 0 ) page： 453 - 453 2017.8

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DOI： 10.11470/jsapmeeting.2017.2.0_453

CiNii Research
The design of the beam line of the Nagoya University accelerator-driven neutron source

Ito I., Furusawa D., Hirota K., Ichikawa G., Iwashita Y., Kitaguchi M., Kiyanagi Y., Menjo Y., Miwata Y., Shimizu H.M., Tsuchida K., Tsuchikawa Y., Tsurita Y., Uritani A., Watanabe K., Yamagata Y., Yamazaki A., Yoshihashi S.

Proceedings of Science Vol. 2017-January 2017

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The Nagoya University Accelerator driven Neutron Source (NUANS) are now constructing at main campus of Nagoya University. The electrostatic accelerator is used with the maximum proton energy and power of 2.8MeV, 15mA(42kW) respectively. Two neutron beam lines are planned at NUANS. The first beam line is dedicated to BNCT. The second beam line is designed for research and development of neutron devices and neutron imaging. The neutrons used for the 2nd beam line are generated by using the (p, n) reaction of beryllium. We designed a compact target station for the 2nd beam line with the dimension of 90cm×90cm×95cm by using radiation shielding simulation. We considered neutron beam extraction with the cross section of 10cm×10cm for radiography at the 2nd beam line. The neutron flux is expected to be about 104n cm-2s-1 with the energy less than 0.1 eV at the position of 2m from the neutron source. We also calculated the proton beam transport from the exit of the accelerator to the neutron production target of the 2nd beam line.

Scopus
Upgrade of Neutron Energy Spectrometer with Single Multilayer Bonner Sphere Using Onion-like Structure

T. Mizukoshi, K. Watanabe, A. Yamazaki, A. Uritani, T. Iguchi, T. Ogata, T. Muramatsu

Journal of Radiation Protection and Research 2016

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DOI： 10.14407/jrpr.2016.41.3.185
Wavelength-shifting fiber signal readout from Transparent RUbber SheeT (TRUST) type LiCaAlF6 neutron scintillator Reviewed

Kenichi Watanabe, Takuya Yamazaki, Dai Sugimoto, Atsushi Yamazaki, Akira Uritani, Tetsuo Iguchi, Kentaro Fukuda, Sumito Ishidu, Takayuki Yanagida, Yutaka Fujimoto

Nuclear Instruments and Methods in Physics Research A Vol. 784 page： 260-263 2015

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Study on in situ calibration for neutron flux monitor in the Large Helical Device based on Monte Carlo calculations Reviewed

Y . Nakano, A. Yamazaki, K. Watanabe, A. Uritani, K. Ogawa, M. Isobe

Review of Scientific Instruments 2014.8

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DOI： 10.1063/1.4891598
Ce-doped LiF-SrF2 eutectic scintillators for thermal neutron detection produced at different solidification rates Reviewed

T. Yanagida, Y. Fujimoto, K. Fukuda, N. Kawaguchi, K. Watanabe, A. Yamazaki, A. Uritani, V. Chani

Optical Materials Vol. 35 page： 1449-1454 2013

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Study on Background Gamma-Ray Reduction Using a Compton Backscattering Coincidence Technique Reviewed

Takashi Takagi, Kenichi Watanabe, Atsushi Yamazaki, and Akira Uritani

IEEE Transactions on Nuclear Science Vol. 60 page： 550-554 2013

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Temperature Dependence of Neutron-Gamma Discrimination Based on Pulse Shape Discrimination Technique in a Ce:LiCaAlF6 Scintillator Reviewed

Kenichi Watanabe, Yoshiyuki Kondo, Atsushi Yamazaki, Akira Uritani, Tetsuo Iguchi, Noriaki Kawaguchi, Kentaro Fukuda, Sumito Ishidu, Takayuki Yanagida, Yutaka Fujimoto, and Akira Yoshikawa

IEEE Transactions on Nuclear Science Vol. 60 page： 959-962 2013

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Development of a micro-size dosimeter using an optical fiber probe based on photostimulable phosphorescence Reviewed

Kenichi Watanabe, Atsushi Yamazaki, Kotaro Nakahashi, Hidefumi Miyamae, Akira Uritani, Eiji Ariga

Radiation Measurements Vol. 55 page： 64-67 2013

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Crystal growth and characterization of calcium metaborate scintillators Reviewed

Fujimoto, Y; Yanagida, T; Kawaguchi, N; Fukuda, K; Totsuka, D; Watanabe, K; Yamazaki, A; Chani, V; Nikl, M; Yoshikawa, A

Nucl. Instrum. Methods A Vol. 703 page： 7-10 2013

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Origin of Fast Scintillation Components of LiCaAlF6 Crystals Reviewed

M. Koshimizu, T. Yanagida, Y. Fujimoto, A. Yamazaki, K. Watanabe, A. Uritani, K. Fukuda, N. Kawaguchi, S. Kishimoto, K. Asai

Applied Physics Express Vol. 6 page： 062601 2013

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Eu-doped (LiF)-Li-6-SrF2 eutectic scintillators for neutron detection Reviewed

T. Yanagida, K. Fukuda, Y. Fujimoto, N. Kawaguchi, S. Kurosawa, A. Yamazaki, K. Watanabe, Y. Futami, Y. Yokota, J. Pejchal, A. Yoshikawa, A. Uritani, T. Iguchi

Optical Materials Vol. 34 ( 5 ) page： 868-871 2012

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Characterizations of Ce3+-Doped CaB2O4 Crystalline Scintillator Reviewed

Fujimoto, Y; Yanagida, T; Kawaguchi, N; Kurosawa, S; Fukuda, K; Totsuka, D; Watanabe, K; Yamazaki, A; Yokota, Y; Yoshikawa, A

CRYSTAL GROWTH & DESIGN Vol. 12 page： 142-146 2012

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Lithium Aluminate Crystals as Scintillator for Thermal Neutron Detection Reviewed

Fujimoto, Y; Kamada, K; Yanagida, T; Kawaguchi, N; Kurosawa, S; Totsuka, D; Fukuda, K; Watanabe, K; Yamazaki, A; Yokota, Y; Yoshikawa, A

IEEE TRANSACTIONS ON NUCLEAR SCIENCE Vol. 59 page： 2252-2255 2012

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*Laser-plasma electron accelerator for all-optical inverse Compton X-ray source Reviewed

K. Koyama, A. Yamazaki, A. Maekawa, M. Uesaka, T. Hosokai, M. Miyashita, S. Masuda, E. Miura

Nucl. Instr. and Meth. A Vol. 608 page： 551-553 2009.5

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Ultra short electron beam bunches from a laser plasma cathode Reviewed

Akira Maekawa, Ryosuke Tsujii, Kennichi Kinoshita, Yamazaki Atsushi, Kazuyuki Kobayashi, Mitsuru Uesaka, Yukio Shibata, Yasuhiro Kondo, Takeru Ohkubo, Tomonao Hosokai, Alexei Zhidkov, Toshiharu Takahashi

Nucl. Instr. and Meth. B Vol. 261 page： 5-8 2007.4

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MEASUREMENT OF ULTRA-SHORT ELECTRON BUNCH DURATION BY COHERENT RADIATION ANALYSIS IN LASER PLASMA CATODE

Ryousuke Tsujii, Kenichi Kinoshita, Akira Maekawa, Atsushi Yamazaki, Mitsuru Uesaka, Yasuhiro Kondo, Yukio Shibata, Alexei Zhidkov, Toshiharu Takahashi, and Tomonao Hosokai

PAC2007 Proc. page： 4066-4068 2007

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MANIPULATION OF ELECTRON BEAM GENERATION WITH MODIFIED MAGNETIC CIRCUIT ON LASER-WAKEFIELD ACCELERATION

A. Yamazaki, A. Maekawa, R. Tsujii, M. Uesaka, K. Kinoshita, T. Hosokai, and A. Zhidkov

PAC2007 Proc. page： 2790-2792 2007

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CTR Bunch Length Measurement of Monoenergetic and Maxwellian Electron Beams from Laser Plasma Cathode

Mitsuru Uesaka, Akira Maekawa, Takeru Ohkubo, Ryosuke Tsujii, Kennichi Kinoshita, Yamazaki Atsushi, Kazuyuki Kobayashi, Yukio Shibata, Yasuhiro Kondo, Tomonao Hosokai, Alexei Zhidkov, and Toshiharu Takahashi

AIP. Conf. Proc Vol. 877 page： 799-806 2006.11

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*Effect of External Static Magnetic Field on the Emittance and Total Charge of Electron Beams Generated by Laser-Wakeﬁeld Acceleration Reviewed

Tomonao Hosokai, Kenichi Kinoshita, Alexei Zhidkov, Akira Maekawa, Atsushi Yamazaki, and Mitsuru Uesaka

Phys. Rev. Lett. Vol. 97 page： 075004 2006.8

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*Observation of strong correlation between quasimonoenergetic electron beam generation by laser wakeﬁeld and laser guiding inside a preplasma cavity Reviewed

Tomonao Hosokai, Kenichi Kinoshita, Takeru Ohkubo, Akira Maekawa, Mitsuru Uesaka, Alexei Zhidkov, Atsushi Yamazaki, Hideyuki Kotaki, Masaki Kando, Kazuhisa Nakajima, Sergei V. Bulanov, Paolo Tomassini, Antonio Giulietti, and Danilo Giulietti

Phys. Rev. E Vol. 73 page： 036407 2006.3

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IMPROVEMENT OF ELECTRON GENERATION FROM A LASER PLASMA CATHODE THROUGH MODIFIED PREPLASMA CONDITIONS USING AN ARTIFICIAL PREPULSE

K. Kinoshita, T. Hosokai, K. Kobayashi, A. Maekawa, T. Ohkubo, R. Tsujii, A. Yamazaki, M. Uesaka, and A. Zhidkov

EPAC2006 Proc. page： 2448-2450 2006

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Observation of strongly collimated proton beam from Tantalum targets irradiated with circular polarized laser pulses Reviewed

MASATAKA KADO, IROYUKI DAIDO, ATSUSHI FUKUMI, ZHONG LI, SATOSHI ORIMO, YUKIO HAYASHI, MAMIKO NISHIUCHI, AKITO SAGISAKA, KOICHI OGURA, MICHIAKI MORI, SHU NAKAMURA, AKIRA NODA, YOSHIHISA IWASHITA, TOSHIYUKI SHIRAI, HIROMU TONGU, TAKESHI TAKEUCHI, ATSUSHI YAMAZAKI, HIROYUKI ITOH, HIKARU SOUDA, KOSHICHI NEMOTO, YUJI OISHI, TAKUYA NAYUKI, HIROMITSU KIRIYAMA, SHUHEI KANAZAWA, MAKOTO AOYAMA, YUTAKA AKAHANE, NORIHIRO INOUE, KOICHI TSUJI, YOSHIKI NAKAI, YOICHI YAMAMOTO, HIDEYUKI KOTAKI, SHUJI KONDO, SERGEI BULANOV, TIMUR ESIRKEPOV, TAKAYUKI UTSUMI, AKIRA NAGASHIMA, TOYOAKI KIMURA, and KOICHI YAMAKAWA

Laser Part. Beams Vol. 24 page： 117-123 2006

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Generation and Characterization of Electrons from a Gas Target Irradiated by High-Peak-Power Lasers Reviewed

M. Kando, S. Masuda, A. Zhidkov, A. Yamazaki, H. Kotaki, S. Kondo, T. Homma, S. Kanazawa, K. Nakajima, L. M. Chen, J. Ma, Y. Hayashi, M. Mori, H. Kiriyama, Y. Akahane, N. Inoue, H. Ueda, Y. Nakai, K. Tsuji, Y. Yamamoto, J. Koga, T. Hosokai, K. Kinoshita, A. Maekawa, M. Uesaka, S. V. Bulanov, T. Zh. Esirkepov, M. Yamagiwa, T. Kimura, K. Yamakawa, and T. Tajima

Laser Phys. Vol. 16 ( 4 ) page： 576-580 2006

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Phase Rotation Scheme of Laser-Produced Ions for Reduction of the Energy Spread Reviewed

A. Noda, S. Nakamura, Y. Iwashita, S. Sakabe, M. Hashida, T. Shirai, S. Shimizu, H. Tongu, H. Ito, H. Souda, A. Yamazaki, M. Tanabe, H. Daido, M. Mori, M. Kado, A. Sagisaka, K. Ogura, M. Nishiuchi, S. Orimo, Y. Hayashi, A. Yogo, S. Bulanov, T. Esirkepov, A. Nagashima, T. Kimura, T. Tajima, T. Takeuchi, K. Matsukado, A. Fukumi, and Z. Li

Laser Phys. Vol. 16 ( 4 ) page： 647-653 2006

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MONOENERGETIC 200FS (FWHM) ELECTRON BUNCH MEASUREMENT FROM THE LASER PLASMA CATHODE

A. Maekawa, T. Hosokai, K. Kinoshita, T. Ohkubo, R. Tsujii, A. Yamazaki, K. Kobayashi, M. Uesaka, T. Takahashi, A. Zhidkov, Y. Kondo, and Y. Shibata

EPAC2006 Proc. page： 2451-2453 2006

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*Quasi-monoenergetic electron beam generation during laser pulse interaction with very low density plasmas Reviewed

A. Yamazaki, H. Kotaki, I. Daito, M. Kando, S. V. Bulanov, T. Zh. Esirkepov, S. Kondo, S. Kanazawa, T. Homma, and K. Nakajima

Phys. Plasmas Vol. 12 page： 093101 2005.8

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*Electron acceleration by a nonlinear wakeﬁeld generated by ultrashort (23-fs) high-peak-power laser pulses in plasma Reviewed

M. Kando, S. Masuda, A. Zhidkov, A. Yamazaki, H. Kotaki, S. Kondo, T. Homma, S. Kanazawa, K. Nakajima, Y. Hayashi, M. Mori, H. Kiriyama, Y. Akahane, N. Inoue, H. Ueda, Y. Nakai, K. Tsuji, Y. Yamamoto, K. Yamakawa, J. Koga, T. Hosokai, M. Uesaka, and T. Tajima

Phys. Rev. E Vol. 71 page： 015403 2005.1

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Laser-driven high-energy ion generation for a compact cancer therapy accelerator

Koji Matsukado, Hiroyuki Daido, Zhong Li, Atsushi Fukumi, Yukio Hayashi, Satoshi Orimo, Sergei V. Bulanov, Mitsuru Uesaka, Koji Yoshii, Takahiro Watanabe, Tomonao Hosokai, Kenichi Kinoshita, Alexei G. Zhidkov, Akira Noda, Yoshihisa Iwashita, Toshiyuki Shirai, Shu Nakamura, Atsushi Yamazaki, Akio Morita, Takeshi Takeuchi, Atsushi Ogata, Yoshio Wada, Tetsuo Kubota, Fuminori Soga, Satoru Yamada, Esirkepov Timur, and Katsunori Nishihara

ECLIM2002 Proc. Vol. 5228 page： 629-636 2003.12

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Energetic Protons from a Few-Micron Metallic Foil Evaporated by an Intense Laser Pulse Reviewed

K. Matsukado, T. Esirkepov, K. Kinoshita, H. Daido, T. Utsumi, Z. Li, A. Fukumi, Y. Hayashi, S. Orimo, M. Nishiuchi, S. V. Bula nov, T. Tajima, A. Noda, Y. Iwashita, T. Shirai, T. Takeuchi, S. Nakamura, A. Yamazaki, M. Ikegami, T. Mihara, A. Morita, M. Uesaka, K. Yoshii, T. Watanabe, T. Hosokai, A. Zhidkov, A. Ogat a, Y. Wada, and T. Kubota

Phys. Rev. Lett. Vol. 91 ( 21 ) page： 215001 2003.11

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Ion Generation via Interaction between Intense Ultra-short Laser Pulse and Solid Target for Application to Cancer Therapy

Koji Matsukado, Kenichi Kinoshita, Zhong Li, Hiroyuki Daido, Yukio Hayashi, Satoshi Orimo, Mitsuru Uesaka, Koji Yoshii, Takahiro Watanabe, Tomonao Hosokai, Alexei Zhidkov, Akira Noda, Yoshihisa Iwashita, Toshiyuki Shirai, Shu Nakamura, Atsushi Yamazaki, Akio Morita, Atsushi Ogata, Yoshio Wada, Tetsuo Kubota, Fuminori Soga, and Satoru Yamada

AIP Conf. Proc. Vol. 647 page： 265-268 2002.12

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ION PRODUCTION WITH A HIGH-POWER SHORT-PULSE LASER FOR APPLICATION TO CANCER THERAPY

A. Noda, H. Fadil, Y. Iwashita, A. Morita*, S. Nakamura, T. Shirai, H. Tongu, A. Yamazaki, H. Daido, Y. Hayashi, S. Orimo, K. Yamakawa, Y. Kato, K. Matsukado, Z. Li, K. Noda, S. Yamada, M. Uesaka, M. Beutelspacher, and M. Grieser

EPAC2002 Proc. page： 2748-2750 2002

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Presentations 55

伴侶動物を治療対象としたBNCT による臓器への影響評価に関する研究

石川裕也，吉橋幸子，山崎淳，瓜谷章

第55回日本原子力学会中部支部研究発表会 2023.12.14

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Event date： 2023.12

Language：Japanese Presentation type：Oral presentation (general)

Country：Japan
BNCT 場におけるPVA KI ゲル線量計の中性子評価に関する研究

鈴木応輔，吉橋幸子，山崎淳，瓜谷章

第55回日本原子力学会中部支部研究発表会 2023.12.14

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Event date： 2023.12

Language：Japanese Presentation type：Oral presentation (general)

Country：Japan
高ガンマ線線量場で動作可能な10 B 中性子検出器の開発

兼浦知希，瓜谷章，山崎淳，吉橋幸子，大村幸一郎

第55回日本原子力学会中部支部研究発表会 2023.12.15

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Event date： 2023.12

Language：Japanese Presentation type：Oral presentation (general)

Country：Japan
先端核融合中性子源（A FNSFNS）のBNCT 応用におけるBSA 設計

天野翔太，西谷健夫，吉橋幸子，瓜谷章，山崎淳

第55回日本原子力学会中部支部研究発表会 2023.12.15

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Event date： 2023.12

Language：Japanese Presentation type：Oral presentation (general)

Country：Japan
犬悪性黒色腫細胞に対するBNCT の有効性評価

土本一貴，吉橋幸子，山﨑淳，岩崎遼太，森崇，瓜谷章

第55回日本原子力学会中部支部研究発表会 2023.12.14

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Event date： 2023.12

Language：Japanese Presentation type：Oral presentation (general)

Country：Japan
動物BNCTの実現に向けた着脱式モジュールの設計と線量評価

水口渉、吉橋幸子、山﨑淳、瓜谷章

日本保健物理学会第56回研究発表会 2023.11.10

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Event date： 2023.11

Language：Japanese Presentation type：Poster presentation

Country：Japan
ホウ素中性子捕捉療法（BNCT）時における被ばく低減に関する基礎的検討

新美秋桜, 吉橋幸子, 山崎淳, 瓜谷章

日本放射線安全管理学会第 22 回学術大会 2023.12.14

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Event date： 2023.11

Language：Japanese Presentation type：Poster presentation

Country：Japan
伴侶動物を治療対象としたBNCT による臓器への影響評価に関する研究

土本一貴、吉橋幸子、山﨑淳、瓜谷章

日本保健物理学会第56回研究発表会 2023.11.12

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Event date： 2023.11

Language：Japanese Presentation type：Poster presentation

Country：Japan
名古屋大学BNCT 用中性子源Li 封入ターゲットの性能向上に向けた特性評価に関する研究

川口直也，山﨑淳，本田祥梧, 吉橋幸子, 瓜谷章

日本原子力学会2023年秋の年会「学生連絡会ポスターセッション」 2023.9.6

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Event date： 2023.9

Language：Japanese Presentation type：Poster presentation

Country：Japan
BNCT適応対象拡大に向けたホウ素取り込み量と生存率の評価

福富太貴，吉橋幸子，山﨑淳，瓜谷章

日本原子力学会2023年秋の年会「学生連絡会ポスターセッション」 2023.11.9

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Event date： 2023.9

Language：Japanese Presentation type：Poster presentation

Country：Japan
免疫蛍光染色を用いたホウ素中性子捕捉反応（BNCR）解明に向けた基礎的検討

鈴木一成, 瓜谷章, 吉橋幸子, 山崎淳, 土田一輝

第54回日本原子力学会中部支部研究発表会 2022.12.15

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Event date： 2022.12

Language：Japanese Presentation type：Oral presentation (general)

Country：Japan
名古屋大学BNCT用加速器システム向上に向けたLIBS システムの適用に関する研究

川口直也, 立松大武, 本田祥梧, 山﨑淳, 吉橋幸子, 瓜谷章

第54回日本原子力学会中部支部研究発表会 2022.12.16

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Event date： 2022.12

Language：Japanese Presentation type：Oral presentation (general)

Country：Japan
血液がんのホウ素取り込み量とBNCT 線量の評価

福富太貴, 吉橋幸子, 土田一輝, 山崎淳, 瓜谷章

第54回日本原子力学会中部支部研究発表会 2022.12.15

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Event date： 2022.12

Language：Japanese Presentation type：Oral presentation (general)

Country：Japan
食塩のOSL特性に関する基礎研究

劉軼夫、永坂光正、瓜谷章、渡辺賢一、吉橋幸子、山﨑淳

第69回応用物理学会春季学術講演会 2022.3.25

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Event date： 2022.3

Presentation type：Oral presentation (general)
BNCT用Li封入型ターゲットの元素分析のためのLIBSシステムの検討

立松大武、吉橋幸子、山﨑淳、本田祥梧、川口直也、小林真、土田一輝、瓜谷章

日本原子力学会2022年春の年会 2022.3.17

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Event date： 2022.3

Presentation type：Oral presentation (general)
BNCT用ダイナミトロン加速器におけるビームプロファイルモニターを用いたビームサイズの評価

降籏大河、吉橋幸子、本田祥梧、土田一輝、山﨑淳、瓜谷章

日本原子力学会2022年春の年会 2022.3.17

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Event date： 2022.3

Presentation type：Oral presentation (general)
X線後方散乱に基づく非破壊検査法の開発

楊一唱、瓜谷章、渡辺賢一、吉橋幸子、山﨑淳

日本原子力学会中部支部第53回研究発表会 2021.12.16

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Event date： 2021.12

Presentation type：Oral presentation (general)
臭化タリウム検出器の電極構造に関する基礎検討」

椿山邦見、吉橋幸子、山﨑淳、瓜谷章、人見啓太朗、野上光博、渡辺賢一

日本原子力学会中部支部第53回研究発表会 2021.12.17

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Event date： 2021.12

Presentation type：Oral presentation (general)
BNCT用ダイナミトロン加速器におけるビームプロファイルモニターを用いたビームサイズの評価

降籏大河、吉橋幸子、本田祥梧、土田一輝、山﨑淳、瓜谷章

日本原子力学会中部支部第53回研究発表会 2021.12.17

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Event date： 2021.12

Presentation type：Oral presentation (general)
食塩のOSL特性に関する基礎研究

劉軼夫、永坂光正、山﨑淳、吉橋幸子、渡辺賢一、瓜谷章

日本原子力学会中部支部第53回研究発表会 2021.12.17

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Event date： 2021.12

Presentation type：Oral presentation (general)
BNCT用Liターゲットの元素分析のためのLIBSシステムの検討

立松大武、吉橋幸子、土田一輝、釣田幸雄、瓜谷章、山﨑淳

日本原子力学会中部支部第53回研究発表会 2021.12.17

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Event date： 2021.12

Presentation type：Oral presentation (general)
高強度中性子場におけるリアルタイム中性子計測のための光ファイバ型中性子検出器に関する研究

石川諒尚、渡辺賢一、山﨑淳、吉橋幸子、瓜谷章、増田明彦、松本哲郎、原野英樹、田中浩基、櫻井良憲、野上光博、人見啓太朗

日本量子医科学会第1回学術大会 2021.12.11

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Event date： 2021.12

Presentation type：Oral presentation (general)
Development of Sealed Lithium Target for BNCT in Nagoya University International conference

Shogo Honda, Sachiko Yoshihashi, Kazuki Tsuchida, Kenichi Watanabe, Atsushi Yamazaki, Yukio Tsurita, Yoshiaki Kiyanagi, Akira Uritani

19th International congress on neutron capture therapy (ICNCT-19)

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Event date： 2021.9 - 2021.10

Language：English Presentation type：Poster presentation
TRUST Liガラス中性子検出器の開発と特性評価

石川諒尚、久貝大輝、渡辺賢一、山﨑淳、吉橋幸子、瓜谷章

第82回応用物理学会秋季学術講演会 2021.9.11

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Event date： 2021.9

Presentation type：Oral presentation (general)
光ファイバ型線量計の感度ばらつき低減に関する検討

金子和樹、渡辺賢一、山﨑淳、吉橋幸子、瓜谷章

第82回応用物理学会秋季学術講演会 2021.9.12

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Event date： 2021.9

Presentation type：Oral presentation (general)
BNCT用Li封入型ターゲットの熱負荷低減のためのビーム操作方法についての検討

冨田誠之介、吉橋幸子、本田祥梧、土田一輝、山﨑淳、渡辺賢一、鬼柳善明、瓜谷章

日本原子力学会2021年秋の大会 2021.9.8

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Event date： 2021.9

Presentation type：Oral presentation (general)
ACE-J40HEを用いたBNCT用p-Li反応による中性子生成量の評価

棚上裕生、西谷健夫、吉橋幸子、山﨑淳、瓜谷章

日本原子力学会2021年秋の大会 2021.9.10

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Event date： 2021.9

Presentation type：Oral presentation (general)
LHD重水素実験において生成される誘導放射能の評価

山田隼人、吉橋幸子、小林真、西谷健夫、渡辺賢一、山﨑淳、磯部光孝、小川国大、瓜谷章

日本原子力学会2021年秋の大会 2021.9.9

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Event date： 2021.9

Presentation type：Oral presentation (general)
BNCT用ダイナミトロン加速器のビーム輸送モデル構築に関する研究

降籏大河、吉橋幸子、本田祥梧、土田一輝、山﨑淳、瓜谷章

日本原子力学会2021年秋の大会 2021.9.8

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Event date： 2021.9

Language：Japanese Presentation type：Oral presentation (general)
名古屋大学BNCT用加速器型中性子源システムLi封入ターゲットの開発状況

本田祥梧、吉橋幸子、冨田誠之介、土田一輝、鬼柳善明、釣田幸雄、渡辺賢一、山﨑淳、瓜谷章

第17回日本中性子捕捉療法学会学術大会

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Event date： 2021.7

Presentation type：Poster presentation
光ファイバ型線量計作製の自動化およびその性能評価

金子和樹、瓜谷章, 渡辺賢一, 吉橋幸子, 山﨑淳

日本原子力学会2021年春の年会 2021.3.18

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Event date： 2021.3

Language：Japanese Presentation type：Oral presentation (general)
Liガラスシンチレータを用いた光ファイバ型中性子検出器のγ線感度評価

石川諒尚、渡辺賢一、山崎淳、吉橋幸子、瓜谷章

日本原子力学会2021年春の年会 2021.3.18

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Event date： 2021.3

Language：Japanese Presentation type：Oral presentation (general)
Liガラスシンチレータを用いた光ファイバ型中性子検出器の熱中性子感度および出力線形性

石川諒尚、渡辺賢一、山崎淳、吉橋幸子、瓜谷章

第68回応用物理学会春季学術講演会 2021.3.16

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Event date： 2021.3

Language：Japanese Presentation type：Oral presentation (general)
BNCT用Li封入型ターゲット表面の熱解析

冨田誠之介, 吉橋幸子, 本田祥梧, 土田一輝, 渡辺賢一, 山崎淳, 瓜谷章

日本原子力学会2021年春の年会 2021.3.18

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Event date： 2021.3

Language：Japanese Presentation type：Oral presentation (general)
中性子ブラッグエッジ解析に対する機械学習の適用性検討

西浦真介、瓜谷章, 渡辺賢一, 吉橋幸子, 山﨑淳

第68回応用物理学会春季学術講演会 2021.3.17

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Event date： 2021.3

Language：Japanese Presentation type：Oral presentation (general)
BeOセラミックの成分分離したTLグローピーク発光量と線量の関係

永坂光正、瓜谷章, 渡辺賢一, 吉橋幸子, 山﨑淳

第68回応用物理学会春季学術講演会 2021.3.19

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Event date： 2021.3

Language：Japanese Presentation type：Oral presentation (general)
BeO OSL線量計のBNCT場適用に向けた検討と特性評価

中村悟、瓜谷章, 渡辺賢一, 吉橋幸子, 山﨑淳

日本放射線安全管理学会 2020.12.9

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Event date： 2020.12

Language：Japanese Presentation type：Oral presentation (general)
光ファイバ型線量計作製方法の自動化に関する検討

金子和樹、瓜谷章, 渡辺賢一, 吉橋幸子, 山﨑淳

第52回日本原子力学会中部支部研究発表会 2020.12.18

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Event date： 2020.12

Language：Japanese Presentation type：Oral presentation (general)
Evaluation of Gamma-ray Sensitivity of an Optical Fiber-based Neutron Detector Using a Li-glass Scintillator International conference

Akihisa Ishikawa, Kenichi Watanabe, Atsushi Yamazaki, Sachiko Yoshihashi, Akira Uritani

IEEE NSS-MIC 2020 2020.11.4

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Event date： 2020.11

Language：English Presentation type：Poster presentation
BeOセラミックの放射線誘起蛍光特性に関する研究

永坂光正、瓜谷章, 渡辺賢一, 吉橋幸子, 山﨑淳

第81回応用物理学会秋季学術講演会 2020.9.11

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Event date： 2020.9

Language：Japanese Presentation type：Oral presentation (general)
光ファイバを用いた人体挿入可能な小型線量計の製作方法に関する検討

金子和樹、瓜谷章, 渡辺賢一, 吉橋幸子, 山﨑淳

第81回応用物理学会秋季学術講演会 2020.9.8

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Event date： 2020.9

Language：Japanese Presentation type：Oral presentation (general)
BeO OSLを用いたBNCT場でのガンマ線線量測定手順に関する詳細検討

中村悟、瓜谷章, 渡辺賢一, 吉橋幸子, 山﨑淳

日本原子力学会2020年秋の年会 2020.9.16

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Event date： 2020.9

Language：Japanese Presentation type：Oral presentation (general)
Liガラスシンチレータを用いた光ファイバ型中性子検出器のガンマ線に対する応答評価

石川諒尚、渡辺賢一、山崎淳、吉橋幸子、瓜谷章

第81回応用物理学会秋季学術講演会 2020.9.10

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Event date： 2020.9

Presentation type：Oral presentation (general)
名古屋大学におけるＢＮＣＴ用加速器型中性子現システム開発(1)システム開発の進捗状況

吉橋幸子、土田一輝、瓜谷章、本田祥梧、渡辺賢一、山﨑淳、鬼柳善明、宮島司

日本原子力学会2020年秋の年会 2020.9.17

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Event date： 2020.9

Language：Japanese Presentation type：Oral presentation (general)
名古屋大学におけるLiターゲットを用いた加速器型中性子源の開発現状

吉橋幸子、土田一輝、瓜谷章、渡辺賢一、山﨑淳、鬼柳善明

第81回応用物理学会秋季学術講演会 2020.9.10

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Event date： 2020.9

Language：Japanese Presentation type：Oral presentation (general)
熱解析を用いたBNCT用Li封入型ターゲットの除熱性能評価

冨田誠之介, 吉橋幸子, 本田祥梧, 土田一輝, 渡辺賢一, 山崎淳, 瓜谷章

第81回応用物理学会秋季学術講演会 2020.9.9

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Event date： 2020.9

Language：Japanese Presentation type：Oral presentation (general)
中性子ブラッグエッジ解析におけるシングルフィッティング精度に関する研究

西浦真介、瓜谷章, 渡辺賢一, 吉橋幸子, 山﨑淳

第81回応用物理学会秋季学術講演会 2020.9.10

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Event date： 2020.9

Language：Japanese Presentation type：Oral presentation (general)
BeOセラミックの放射線誘起の発光機構に関する調査

永坂光正、瓜谷章, 渡辺賢一, 吉橋幸子, 山﨑淳

第32回放射線夏の学校 2020.8.20

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Event date： 2020.8

Language：Japanese Presentation type：Oral presentation (general)
多重球殻構造を有する単一減速材球型中性子スペクトロメータ International conference

瓜谷章, 水越友亮, 渡辺賢一, 山崎淳, 村松貴史, 緒方智洋

日本放射線安全管理学会第１４回学術大会 2015.12.2

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Event date： 2015.12

Language：Japanese Presentation type：Oral presentation (general)

Country：Japan
Upgrade of the laser plasma cathode by external magnetic field of 1.0 T International conference

20th International Conference on the Application of Accelerators in Research and Industry 2008.8.18

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Event date： 2008.8

Language：English Presentation type：Poster presentation
東京大学原子力専攻におけるレーザープラズマカソード実験

山崎淳, 前川陽, 辻井良介, 上坂充, 細貝知直, アレクセイ・ジドコフ

第4回日本加速器学会年会/第32回リニアック技術研究会 2007.8.1

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Event date： 2007.8

Language：Japanese Presentation type：Oral presentation (general)

Country：Japan
人工プレパルスを用いたレーザープラズマカソードによる電子発生その1

山崎淳，木下健一，細貝知直，アレクセイ・ジドコフ，前川陽，上坂充

日本物理学会-2007年春季大会 2007.3.18

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Event date： 2007.3

Language：Japanese Presentation type：Oral presentation (general)

Country：Japan
高強度超短パルスレーザーを照射したガスジェットからの高速電子発生実験

山崎淳，野田章，神門正城，小瀧秀行，近藤修司，金沢修平，益田伸一，本間隆之，中島一久，桐山博光，赤羽温，森道昭，林由紀雄，中井善基，井上典洋，上田英樹，山本洋一，辻公一，山川考一，細貝知直，上坂充

日本物理学会-第59回年次大会 2004.3.27

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Event date： 2004.3

Language：Japanese Presentation type：Oral presentation (general)

Country：Japan
KSRにおけるレーザー逆コンプトン散乱によるX線発生実験

山崎淳，白井敏之，頓宮拓，岩下芳久，野田章

日本物理学会-第58回年次大会 2003.3.28

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Event date： 2003.3

Language：Japanese Presentation type：Oral presentation (general)

Country：Japan
KSRにおけるレーザー逆コンプトン散乱によるX線発生実験

山崎淳，白井敏之，頓宮拓，岩下芳久，野田章

日本物理学会-第57回年次大会 2002.3.24

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Event date： 2002.3

Language：Japanese Presentation type：Oral presentation (general)

Country：Japan

▼display all

To the head of Presentations.▲

KAKENHI (Grants-in-Aid for Scientific Research) 4

Application of laser-driven circularly polarized femtosecond soft-x-ray pulse to time-resolved x-ray magnetic circular dichroism measurement

Grant number：22H01197 2022.4 - 2025.3

Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)

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Authorship：Coinvestigator(s)
Application of laser-driven circularly polarized femtosecond soft-x-ray pulse to time-resolved x-ray magnetic circular dichroism measurement

Grant number：23K22468 2022.4 - 2025.3

Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)

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Authorship：Coinvestigator(s)
High efficiency, fine and large area neutron scintillator using transparent composite scintillator

Grant number：18H03468 2018.4 - 2021.3

Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)

Watanabe Kenichi

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Authorship：Coinvestigator(s)

Grant amount：\1040000 （ Direct Cost: \800000 、 Indirect Cost：\240000 ）

We developed the transparent composite scintillators for neutron detection. As the promising candidates, the transparent composites containing mixed powder of LiF neutron converter and Eu:CaF2 scintillator, and the transparent composite containing Li glass scintillator powder were developed. From the viewpoint of reproducibility and production yield, the Li glass powder composite was concluded to be the most promising candidate. As a future work, we will produce a large area and highly efficient neutron scintillator sheet using the transparent composite containing Li glass scintillator powder.
Neutron generation using a laser-driven femtosecond gamma-ray pulse

Grant number：16H04090 2016.4 - 2019.3

MIURA Eisuke

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Authorship：Coinvestigator(s)

We carried out the research and development for realizing an ultrashort pulse neutron source using a gamma-ray source based on a laser-accelerated electron beam. To produce laser-accelerated electron beams with high energy and high charge, the high-power femtosecond laser system was upgraded. We investigated the conditions for the generation of laser-accelerated electron beam with high charge using particle-in-cell simulations. The simulation results showed the possibility of efficient laser electron acceleration for the generation of high-charge electron beams using a mid-infrared femtosecond laser pulse.

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