SEARCH

Search Details

Hiraga Fujio

Faculty of Engineering　Applied Quantum Science and Engineering　Quantum Engineering for MaterialsAssistant Professor

Researcher basic information

■ Degree
  • 博士（工学）, 北海道大学
■ URL
researchmap URLホームページURL■ Various IDs
J-Global ID■ Research Keywords and Fields
Research Keyword
  • Monte Carlo simulation
  • ホウ素中性子捕捉療法
  • 加速器科学
  • 中性子工学
  • 放射線工学
Research Field
  • Energy Engineering, Nuclear engineering
■ Educational Organization

Research activity information

■ Papers
■ Other Activities and Achievements
  • Neutron Energy Resolution at ANNRI
    KINO Koichi; FURUSAKA Michihiro; HIRAGA Fujio; KAMIYAMA Takashi; KIYANAGI Yoshiaki; KIYANAGI Yoshiaki; KIMURA Atsushi; HARADA Hideo; NAKAMURA Shyoji; TOH Yosuke; IGASHIRA Masayuki; KATABUCHI Tatsuya; MIZUMOTO Motoharu; HORI Jun‐ichi, 日本原子力研究開発機構JAEA-Conf(Web), 2015-003, 3 (WEB ONLY), Mar. 2016
    English
  • ANNRIにおけるGeスペクトロメータを用いたTc‐99の中性子捕獲断面積の研究
    KINO KOICHI; KAMIYAMA TAKASHI; HIRAGA FUJIO; KIYANAGI YOSHIAKI; HARADA HIDEO; KIMURA ATSUSHI; NAKAMURA SHOJI; IGASHIRA MASAYUKI; HORI JUN'ICHI, 日本原子力学会春の年会予稿集(CD-ROM), 2015, ROMBUNNO.N03, 05 Mar. 2015
    Japanese
  • いばらき中性子医療研究センターにおける加速器BNCT施設の建設
    小林仁; 栗原俊一; 吉岡正和; 松本浩; 松本教之; 熊田博明; 櫻井英幸; 田中進; 松村明; 菅野東明; 柱野竜臣; 中島宏; 中村剛実; 平賀富士夫; 大場俊幸; 小林創; 名倉信明; 黒川真一; 中本崇志; ZAGAR Tilen, 日本加速器学会年会(Web), 11th, SAOLP4 (WEB ONLY), 2014
    Japanese
  • 小型加速器中性子源の通信機器ソフトエラー試験への応用
    IWASHITA HIDENORI; ARAI KAORU; KOTANIGAWA TAKASHI; SATO HIROTAKA; KINO KOICHI; KAMIYAMA TAKASHI; HIRAGA FUJIO; KIYANAGI YOSHIAKI; FURUSAKA MICHIHIRO, 日本中性子科学会年会講演概要集, 14th, 31, 2014
    Japanese
  • いばらき中性子医療研究センターにおける加速器BNCT施設の建設(中間報告)
    吉岡正和; 栗原俊一; 小林仁; 松本浩; 松本教之; 熊田博明; 櫻井英幸; 田中進; 松村明; 菅野東明; 柱野竜臣; 中島宏; 中村剛実; 鬼柳善明; 平賀富士夫; 大場俊幸; 岡崎浩二, 日本加速器学会年会(Web), 10th, MOOS16 (WEB ONLY), 2013
    Japanese
  • ANNRIを用いたPd‐108の中性子捕獲断面積測定
    中村詔司; 木村敦; 北谷文人; 金政浩; 小泉光生; 藤暢輔; 原かおる; 廣瀬健太郎; 古高和禎; 原田秀郎; 大島真澄; 片渕竜也; 水本元治; 井頭政之; 木野幸一; 平賀富士夫; 加美山隆; 鬼柳善明; 堀順一; 八島浩, 日本原子力学会秋の大会予稿集(CD-ROM), 2012, ROMBUNNO.I02, 03 Sep. 2012
    Japanese
  • 中性子核反応測定装置ANNRIを用いたTc‐99の中性子捕獲断面積測定
    KINO KOICHI; KAMIYAMA TAKASHI; KIYANAGI YOSHIAKI; HIRAGA FUJIO; FURUSAKA MICHIHIRO; OTA MASAYUKI; OSHIMA MASUMI; KITATANI FUMITO; KIMURA ATSUSHI; KIN TADAHIRO; KOIZUMI MITSUO; GOKO SHINJI; TO YOSUKE; NAKAMURA SHOJI; HARA KAORU; HARADA HIDEO; HIROSE KENTARO; FURUTAKA KAZUYOSHI; IGASHIRA MASAYUKI; KATABUCHI TATSUYA; MIZUMOTO MOTOHARU; HORI JUN'ICHI; TAKAMIYA KOICHI; FUKUTANI SATOSHI; FUJII TOSHIYUKI, 日本原子力学会春の年会予稿集(CD-ROM), 2012, ROMBUNNO.C33, 02 Mar. 2012
    Japanese
  • ANNRIの中性子特性について
    鬼柳善明; 加美山隆; 木野幸一; 古坂道弘; 平賀富士夫; 藤田文行; 井頭政之; 片渕竜也; 水本元治; 太田雅之; 大島真澄; 北谷文人; 木村敦; 金政浩; 小泉光生; 後神進史; 藤暢輔; 中村詔司; 原田秀郎; 古高和禎, 日本原子力研究開発機構JAEA-Review(Web), 2011-014, 2.4.1 (WEB ONLY), Jun. 2011
    Japanese
  • Zr‐93の中性子捕獲断面積測定
    HORI JUN'ICHI; TAKAMIYA KOICHI; FUKUTANI SATOSHI; FUJII TOSHIYUKI; OTA MASAYUKI; OSHIMA MASUMI; KITATANI FUMITO; KIMURA ATSUSHI; KIN TADAHIRO; KOIZUMI MITSUO; GOKO SHINJI; TO YOSUKE; NAKAMURA SHOJI; HARADA HIDEO; FURUTAKA KAZUYOSHI; IGASHIRA MASAYUKI; KATABUCHI TATSUYA; MIZUMOTO MOTOHARU; KAMIYAMA TAKASHI; KINO KOICHI; KIYANAGI YOSHIAKI; HIRAGA FUJIO; FURUSAKA MICHIHIRO, 日本原子力研究開発機構JAEA-Review(Web), 2011-014, WEB ONLY 2.4.3, Jun. 2011
    Japanese
  • NaI(Tl)検出器を用いたJ‐PARC/ANNRIでのTc‐99の中性子捕獲断面積測定
    片渕竜也; 水本元治; 井頭政之; 木村敦; 藤暢輔; 中村詔司; 後神進史; 原かおる; 金政浩; 太田雅之; 北谷文人; 古高和禎; 小泉光生; 廣瀬健太郎; 原田秀郎; 大島真澄; 堀順一; 木野幸一; 加美山隆; 平賀富士夫; 古坂道弘; 鬼柳善明, 日本原子力学会春の年会予稿集(CD-ROM), 2011, ROMBUNNO.M16, 11 Mar. 2011
    Japanese
  • 全立体角Geスペクトロメータを用いたJ‐PARC/NNRIでの93Zrの中性子捕獲断面積測定
    HORI JUN'ICHI; TAKAMIYA KOICHI; FUKUTANI SATOSHI; FUJII TOSHIYUKI; OTA MASAYUKI; OSHIMA MASUMI; KITATANI FUMITO; KIMURA ATSUSHI; KIN TADAHIRO; KOIZUMI MITSUO; GOKO SHINJI; TO YOSUKE; NAKAMURA SHOJI; HARADA HIDEO; FURUTAKA KAZUYOSHI; IGASHIRA MASAYUKI; KATABUCHI TATSUYA; MIZUMOTO MOTOHARU; KAMIYAMA TAKASHI; KINO KOICHI; KIYANAGI YOSHIAKI; HIRAGA FUJIO; FURUSAKA MICHIHIRO, 日本原子力学会秋の大会予稿集(CD-ROM), 2010, ROMBUNNO.I12, 27 Aug. 2010
    Japanese
  • Study on nuclear data by using a high intensity pulsed neutron source for advanced nuclear system: (2) J-PARC beam line for capture cross-section
    kino koichi; Kamiyama Takashi; Kiyanagi Yoshiaki; Hiraga Fujio; Furusaka Michihiro; Ohta Masayuki; Oshima Masumi; Kitatani Fumito; Kimura Atsushi; Kin Tadahiro; Koizumi Mitsuo; Goko Shinji; Toh Yosuke; Nakamura Shoji; Harada Hideo; Furutaka Kazuyoshi; Igashira Masayuki; Katabuchi Tatsuya; Mizumoto Motoharu, Proceedings of Annual / Fall Meetings of Atomic Energy Society of Japan, 2010s, 47, 47, 09 Mar. 2010
    プロジェクト「高強度パルス中性子源を用いた革新的原子炉用核データの研究開発」のうち、中性子捕獲反応の高精度な断面積測定を目的として、J-PARC/MLFに中性子ビームラインを建設した。本発表では、このビームラインの構造を紹介し、得られる中性子ビームの特性について述べる。, Atomic Energy Society of Japan, Japanese
  • 高強度パルス中性子源を用いた革新的原子炉用核データの研究開発(6)NaI検出器を用いたJ‐PARCでの捕獲断面積測定
    片渕竜也; 水本元治; 井頭政之; 木村敦; 藤暢輔; 中村詔司; 後神進史; 金政浩; 太田雅之; 北谷文人; 古高和禎; 小泉光生; 原田秀郎; 大島真澄; 堀順一; 木野幸一; 加美山隆; 平賀富士夫; 古坂道弘; 鬼柳善明, 日本原子力学会春の年会予稿集(CD-ROM), 2010, ROMBUNNO.B44, 09 Mar. 2010
    Japanese
  • 高強度パルス中性子源を用いた革新的原子炉用核データの研究開発(2)J‐PARC捕獲断面積ビームライン
    木野幸一; 加美山隆; 鬼柳善明; 平賀富士夫; 古坂道弘; 太田雅之; 大島真澄; 北谷文人; 木村敦; 金政浩; 小泉光生; 後神進史; 藤暢輔; 中村詔司; 原田秀郎; 古高和禎; 井頭政之; 片渕竜也; 水本元治, 日本原子力学会春の年会予稿集(CD-ROM), 2010, ROMBUNNO.B40, 09 Mar. 2010
    Japanese
  • 高強度パルス中性子源を用いた革新的原子炉用核データの研究開発(5)全立体角Ge測定器を用いたJ‐PARCでの捕獲断面積測定
    木村敦; 太田雅之; 大島真澄; 北谷文人; 金政浩; 小泉光生; 後神進史; 藤暢輔; 中村詔司; 原田秀郎; 古高和禎; 井頭政之; 片渕竜也; 水本元治; 加美山隆; 鬼柳善明; 木野幸一; 平賀富士夫; 古坂道弘; 堀順一, 日本原子力学会春の年会予稿集(CD-ROM), 2010, ROMBUNNO.B43, 09 Mar. 2010
    Japanese
  • Neutron Nucleus Reaction Instrument, NNRI
    鬼柳善明; 木野幸一; 古坂道弘; 加美山隆; 平賀富士夫; 井頭政之; 片渕竜也; 水本元治; 大島真澄; 原田秀郎; 木村敦; 金政浩; 後神進史; 太田雅之; 藤暢輔; 小泉光生; 北谷文人; 中村詔司; 古高和禎, 波紋, 20, 1, 21, 24, 20 Jan. 2010
    Japanese
  • ガンマ線検出器によるJ‐PARC MLF BL04の中性子束測定及び中性子・ガンマ線場の特性試験
    水本元治; 井頭政之; 片渕竜也; 堀順一; 木野幸一; 鬼柳善明; 加美山隆; 平賀富士夫; 古坂道弘; 木村敦; 藤暢輔; 中村詔司; 後神進史; 金政浩; 太田雅之; 北谷文人; 古高和禎; 小泉光生; 原田秀郎; 大島真澄, 日本原子力学会秋の大会予稿集(CD-ROM), 2009, J14, 28 Aug. 2009
    Japanese
  • J‐PARC/MLFビームラインBL04における中性子スペクトルの測定
    太田雅之; 大島真澄; 北谷文人; 木村敦; 金政浩; 小泉光生; 後神進史; 藤暢輔; 中村詔司; 原田秀郎; 古高和禎; 井頭政之; 片渕竜也; 水本元治; 加美山隆; 木野幸一; 鬼柳善明; 平賀富士夫; 古坂道弘, 日本原子力学会秋の大会予稿集(CD-ROM), 2009, J15, 28 Aug. 2009
    Japanese
  • Neutron capture gamma-ray measurement with NaI(Tl) detector at BL04 of J-PARC/MLF
    Katabuchi Tatsuya; Mizumoto Motoharu; Igashira Masayuki; Kimura Atsushi; Toh Yosuke; Nakamura Shoji; Goko Shinji; Kin Tadahiro; Ohta Masayuki; Kitatani Fumito; Furutaka Kazuyoshi; Koizumi Mitsuo; Harada Hideo; Oshima Masumi; Hori Jun-ichi; Kino Koichi; Kamiyama Takashi; Hiraga Fujio; Furusaka Michihiro; Kiyanagi Yoshiaki, Proceedings of Annual / Fall Meetings of Atomic Energy Society of Japan, 2009, 0, 59, 59, 2009
    J-PARC MLF（物質・生命科学実験施設）ビームライン4（BL04）において、MAおよびLLFP核種の中性子捕獲断面積の測定を計画している。今回、NaI(Tl)検出器を用いて、中性子捕獲反応実験のための予備実験を行った。その結果について報告する。, Atomic Energy Society of Japan, Japanese
  • 中性子ビームラインNNRI
    木野幸一; 加美山隆; 鬼柳善明; 平賀富士夫; 古坂道弘; 太田雅之; 大島真澄; 北谷文人; 木村敦; 金政浩; 小泉光生; 後神進史; 藤暢輔; 中村詔司; 原田秀郎; 古高和禎; 井頭政之; 片渕竜也; 水本元治, 日本原子力学会北海道支部研究発表会講演要旨集, 27th, 14, 15, 2009
    Japanese
  • Measurement of spatial and energy distributions and pulse shape of neutron beam at J-PARC/MLF BL04
    kino koichi; Kamiyama Takashi; Kiyanagi Yoshiaki; Hiraga Fujio; Furusaka Michihiro; Ohta Masayuki; Oshima Masumi; Kitatani Fumito; Kimura Atsushi; Kin Tadahiro; Koizumi Mitsuo; Goko Shinji; Toh Yosuke; Nakamura Shoji; Harada Hideo; Furutaka Kazuyoshi; Igashira Masayuki; Katabuchi Tatsuya; Mizumoto Motoharu, Proceedings of Annual / Fall Meetings of Atomic Energy Society of Japan, 2009, 0, 174, 174, 2009
    J-PARC/MLF BL04にて中性子ビームの実験標的位置における空間分布とエネルギー分布を測定した。また、熱および熱外中性子エネルギー領域のパルスを測定した。これらの結果を中性子源シミュレーションによる結果と比較した。, Atomic Energy Society of Japan, Japanese
  • Pulsed Neutron Spectroscopic Imaging for Investigating Microstructure of Material
    Y. Kiyanagi; T. Kamiyama; T. Nagata; K. Sakuma; H. Iwasa; F. Hiraga; K. Iwase, NEUTRON RADIOGRAPHY, 363, 368, 2008
    English
  • 19aXB-7 Neutron beam focusing by a pulsed sextupole electromagnet
    Shinohara T.; Iwashita H.; Suzuki J.; Oku T.; Kamiyama T.; Iwasa H.; Hiraga F.; Kiyanagi Y.; Sato K.; Shimizu H. M., Meeting abstracts of the Physical Society of Japan, 62, 1, 949, 949, 28 Feb. 2007
    The Physical Society of Japan (JPS), Japanese
  • Measurements of spatial distribution of intensity and energy spectrum of neutrons from coupled hydrogen moderators by using a position sensitive detector (Cooperative research)
    Kai Tetsuya; Kamiyama Takashi*; Hiraga Fujio*; Kato Takashi; Kiyanagi Yoshiaki*, JAEA-Research 2006-090, 35, Feb. 2007
    Spatial distributions of neutron intensities were measured based on the pinhole camera principle to confirm a peculiar one for a para-hydrogen (H$_2$) moderator by neutron transportation calculations. Para- H$_2$ and ortho-rich-H$_2$ (ortho/para ratio was 60:40-70:30) were utilized. The results are consistent with the calculations. Position dependences of energy spectra were measured for further discussions. Both moderators exhibit the intensity enhancements at the fringe part between 15 and 100 meV. Below 15 meV, the para-H$_2$ moderator exhibits higher intensity at the fringe part, while a intensity decrease was recognized at the fringe part of the ortho-rich-H$_2$ one. The reasons for the peculiar distribution are due to the characteristics of para- H$_2$: the effective slowing-down reaction for thermal neutrons and the higher transmission rate for cold neutrons. The present result is one of the basis confirming the reliability of design calculation used in the J-PARC project., English, Technical report
  • 中性子非弾性散乱によるメタンハイドレートの微分断面積の詳細解析
    関直樹; 加美山隆; 鬼柳善明; 岩佐浩克; 平賀富士夫; 内田努; 山内宏樹; 井川直樹; 石井慶信; 海老沼孝郎; 成田英夫; BENNINGTON Stephen M., 日本原子力学会秋の大会予稿集(CD-ROM), 2006, 2006
  • メタンハイドレートに特徴的な運動モードの解析
    関直樹; 加美山隆; 鬼柳善明; 岩佐浩克; 平賀富士夫; 内田努; 山内宏樹; 井川直樹; 石井慶信; 海老沼孝郎; 成田英夫; BENNINGTON S. M., 日本中性子科学会年会講演概要集, 6th, 2006
  • Application of spectroscopic radiography using pulsed neutron time-of-flight method for material characterization
    Yoshiaki Kiyanagi; Takashi Kamiyama; Toshiyuki Nagata; Fujio Hiraga, ADVANCED NONDESTRUCTUVE EVALUATION I, PTS 1 AND 2, PROCEEDINGS, 321-323, 1663, 1666, 2006
    English
  • Dynamical structure of methane hydrate measured by neutron inelasitic scattering
    Kiyanagi, Y; Kamiyama, T; Ohnuma, S; Hiraga, F; Uchida, T; Ebinuma, T; Narita, H; Bennington, S, Proc. of 5th Int. Conf. on Gas Hydrates, 502, 506, 2005
    English, Summary international conference
  • Kiyanagi,Y., Kamiyama,T., Iwasa,H. and Hiraga,F. : "Characteristics of a New Type Neutron Radiography Using Time-of-Flight Method", Key Engineering Materials, Volumes 270-273 :1371-1375 (2004)*
    2004
  • Kiyanagi, Y., Ogawa, Y., Kitazaki, K., Hiraga, F., Kamiyama, T. and Furusaka. M.: "Neutronic Studies on a Target-moderator-reflector Assembly for the JHF N-arena Spallation Neutron Source in Japan", Proc. 14th International Collaboration on Advanced Ne・・・
    1998
    Kiyanagi, Y., Ogawa, Y., Kitazaki, K., Hiraga, F., Kamiyama, T. and Furusaka. M.: "Neutronic Studies on a Target-moderator-reflector Assembly for the JHF N-arena Spallation Neutron Source in Japan", Proc. 14th International Collaboration on Advanced Neutron Sources, Illinois, pp.599-604(1998)
■ Syllabus
  • 加速器科学特論-I, 2024年, 修士課程, 工学院
  • 加速器科学特論-II, 2024年, 修士課程, 工学院
  • 医理工加速器科学, 2024年, 修士課程, 医理工学院
  • 加速器科学特論-I, 2024年, 博士後期課程, 工学院
  • 加速器科学特論-II, 2024年, 博士後期課程, 工学院
  • 一般教育演習(ﾌﾚｯｼｭﾏﾝｾﾐﾅｰ), 2024年, 学士課程, 全学教育
■ Works
  • 日本原子力学会2008年秋の大会
    2008
■ Research Themes
  • Numerical and experimental examinations for electron-linear-accelerator-driven neutron source for boron neutron capture therapy
    Grants-in-Aid for Scientific Research
    01 Apr. 2020 - 31 Mar. 2023
    平賀 富士夫
    ホウ素中性子捕捉療法のための電子LINACとタングステンのターゲットを用いるビーム成形装置（BSA）は、ターゲットの耐用期間が長いことやBSAの放射化レベルが低くなることなどの利点を有する。しかし、入射電子のビームパワー当たりのターゲットの光中性子生成率が低く、限られた照射時間の間に治療効果のある線量を処方するにはBSAの中性子減速材や中性子フィルターなどの適切な設計が不可欠である。そこで、33MeV・1.2mA (40kW) の電子LINACを用いるBSAの中性子ビームを照射されるファントム内のRBE線量の計算に基づいて、BSAの中性子減速材（MgF2）と中性子フィルター（Al）の最適設計を行った。治療場所の中性子ビームの1×10^9 [cm^-2s^-1] 以上の熱外中性子束、1×10^-12 [Gy cm^2] 以下の高速中性子混入率、3×10^-13 [Gy cm^2] 以下のγ線混入率を満たすような、中性子フィルターと中性子減速材の厚さと面積の組み合わせを調べた。さらに、治療場所に円筒型のファントムを設置し、腫瘍組織と正常組織の10Bの65ppmと18ppmの濃度を仮定し、RBE線量率を計算した。正常組織のRBE線量が10Gy-eqを超えないように中性子ビームの照射時間を決めた。腫瘍組織のRBE線量分布から、治療効果が見込まれる最大深さAD[cm]、確実な腫瘍の死滅が期待される最大深さAD30[cm]を計算した。その結果、36×52×52cmの中性子フィルターと24×52×52cm の中性子減速材を用いる場合、中性子ビームの照射時間が1387.2sになり、腫瘍組織のRBE線量のAD30とADの5.56cmと8.56cmの極大値が得られた。このことから、許容できる照射時間の間に、大脳の中心付近に位置する腫瘍に治療効果のある線量を処方できる見込みを得た。
    Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (C), Hokkaido University, 20K05378
  • Development of the next generation neutron target with low radio-activity for medical application
    Grants-in-Aid for Scientific Research
    01 Apr. 2014 - 31 Mar. 2018
    Kurihara Toshikazu; KUMADA Hiroaki; HIRAGA Fujio; TAKAGI Akira; SUGIMURA Takashi; SATOU Masaharu
    Development of the next generation neutron target with low radio-activity for medical application is composed of two contents. One is to develop the observation method of proton induced radiation defect. The other is to realize the neutron target to release hydrogen.
    Long distance blistering observation system using He-Ne laser light reflection method has developed. Several meters from the neutron target to the observation apparatus is necessary. Special nature of the blistered materials which is a mass of a small mirror on the surface or inside of the surface enables us to construct the shape of the distribution of blisterings. Noble application of the physical vapor deposition technique to the beryllium thin film makes the release of hydrogen gas to outside the neutron target. This process enables the possibility of blistering free neutron target under the irradiation of proton beams.
    Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (B), High Energy Accelerator Research Organization, 26293136
  • Systematic Study on Neutron Capture Reaction Cross Sections for the Technological Development of Nuclear Transmutation of Long-Lived Nuclear Wastes
    Grants-in-Aid for Scientific Research
    01 Apr. 2010 - 31 Mar. 2015
    IGASHIRA Masayuki; KATABUCHI Tatsuya; HARADA Hideo; NAKAMURA Shoji; IWAMOTO Nobuyuki; KIMURA Atsushi; HORI Jun-ichi; KIYANAGI Yoshiaki; KAMIYAMA Takashi; KINO Koichi; HIRAGA Fujio; YASHIMA Hiroshi
    The objective of the present study was to contribute to the improvement of the accuracy of database for neutron capture reaction cross sections used for the technological development of nuclear transmutation of long-lived nuclear wastes. First, the precise measurements of capture cross sections of long-lived nuclear wastes, i.e. Zr-93, Tc-99, Pd-107, I-129, Np-237, Am-241, Am-243, Cm-244, Cm-246, and related stable isotopes were performed. Then, theoretical analysis of the measured results was systematically performed, and the capture reaction mechanism of long-lived nuclear wastes was elucidated. Finally, reliable calculated capture cross sections for all long-lived nuclear wastes and in the whole neutron energy region were supplied.
    Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (S), Tokyo Institute of Technology, 22226016
  • Study on change of transmission cross sections and development of new application field in spectroscopic imaging using a pulsed neutron transmission method
    Grants-in-Aid for Scientific Research
    2008 - 2010
    KIYANAGI Yoshiaki; FURUSAKA Michihiro; KAMIYAMA Takashi; MOCHIKI Kohichi; HIRAGA Fujio; KANEKO Junichi; IWASE Kenji; HARADA Masahide; OOI Motoki; SATO Setso; SAGEHASHI Hidenori
    It has been clarified that texture in metals reflects the neutron transmission cross section and the world's first analysis code for deducing quantitative information of the texture, crystallite size and strain has been developed. By using this code texture and crystallite size of a welded iron were investigated, and also texture, crystallite size and strain of iron during in-situ tensile test were successfully imaged. Furthermore, a camera system applicable to a pulsed neutron source has been developed.
    Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (A), Hokkaido University, 20246136
  • ホウ素中性子捕捉療法用の熱外中性子生成・照射システムの開発
    新エネルギー技術研究開発費
    2010
    Competitive research funding
  • 小型陽子加速器を用いた冷中性子源の開発
    2007
    Competitive research funding
  • Development of high efficiency pursed neutron source by using a new material of methane hydrate
    Grants-in-Aid for Scientific Research
    2002 - 2004
    KIYANAGI Yoshiaki; KAMIYAMA Takashi; HIRAGA Fujio; SAWAMURA Teruko; KANEKO Junichi; FURUSAKA Michihiro
    Methane hydrate has been expected as a cold neutron moderator material giving higher intensity over wide energy range. We have performed experimental studies mainly. We measured neutron inelastic scattering at ISIS in UK to know the neutron cross-section characteristics. The methane molecule in methane hydrate seemed to rotate freely since the rotational energy level was 1.1meV which is almost same as the energy level of free rotation of methane. We could deduce the translational modes in the small and large ice cages. The ice vibrational mode and librational mode in methane hydrate were almost similar to those of ice In although there existed small distortion. These data suggested that methane hydrate cross section can be simulated linear combination of cross sections of both materials. As a moderator the effect of methane is important but the content of methane is not so high in methane hydrate.
    So, we performed moderator experiments to observe the neutronic performance of methane hydrate. We studied a coupled and a decoupled moderators. Methane and hydrogen moderator data were also obtained fro the comparison. In the case of the coupled moderator, the shape of the energy spectrum of methane hydrate was similar to that of ice, the peak energy of methane hydrate moderator was little bit higher than those of other materials of methane and hydrogen. Spectral intensity around the cold neutron region was much lower than other materials. However, around the thermal neutron region the intensity was higher. In the case of the decoupled moderator the spectral intensity was approaching that of hydrogen moderator but much lower than methane. The pulse width of emission time was much wider than other moderators. Therefore, it will be concluded that the methane hydrate moderator does not have so good characteristics as a cold moderator and can give higher intensity at higher energy region.
    Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (B), HOKKAIDO UNIVERSITY, 14380229
  • Collaboration on development of very high intensity pulsed neutron sources
    Grants-in-Aid for Scientific Research
    1999 - 2001
    KIYANAGI Yoshiaki; NARITA Hasakuni; HIRAGA Fujio; KAMIYAMA Takashi; WATANABE Noboru; FURUSAKA Michihiro
    High power spallation neutron sources with a power of MW class are now under construction in Japan and the USA, and in the Europe a higher power spallation neutron source with a power of 5 MW is now under planning. The neutron production part (target/moderator/reflector system : TMRS) of the facility is most important since it determines the performance of the facility. In this project, we studied the TMRS and got the results described below.
    We could introduce a new simulation code by collaborating with Los Alamos, and it has been a very powerful tool for optimization. We succeeded to increase effectively the intensity from a hydrogen moderator by introducing the heavy water pre-moderator. As a new type moderator we examined HD and CH3D moderators and got information about the neutron characteristics on the partially deuterated material.
    We measured the neutronic performance of LANSCE at Los Alamos, the second highest power spallation source in the world. We could check the validity of the simulation and get information on ortho-para transition at high radiation field.
    We have obtained very useful information on the design of the new spallation neutron sources in Japan, which is also useful for other future spallation sources.
    Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (B), Hokkaido University, 11694111
  • Neutron beam transport by using a magnetic lens and multi-capilary fibers
    Grants-in-Aid for Scientific Research
    1999 - 2000
    KIYANAGI Yoshiaki; HIRAGA Fujio; KAMIYAMA Takashi; SAWAMURA Sadashi; KAWABATA Yuji; FURUSAKA Michihiro
    Narrow neutron beam with high intensity will open wide variety of neutron utilization fields. We studied two methods to focusing the neutoron beam. One is neutron mzgnetic lens by using 6 pole magnetic field, and the other is multi-capilary fiber.
    About magnetic lens, first we measured the neutron intensity through the lens and found that there exist factor 2 difference in focusing intensity between simulation and experiment. We tried to explain the reason of We found that there existed some distortion in the lens system due to strong force of high magnetic field and that this would cause gaps between magnet components. These gaps reduced the intensity. Succeedingly, we studied a function of the mfagnetic lens to forcus and pararell the neutron beasm, in which system two lenses are arranged in a series. For such a system we need neutron spin flipper to change orientation of the neutron spin between the two lenses. We observed the evidence of the neutron focusing and defocusing by using the spin flipper. This suggest the system works as neutron focusing and pararelling device.
    Second, we studied the wavelength dependence of neutron transmission through a multi-capirally fiber in order to know the effectiveness for utilization of white beam. A three dimensional simulation code was developed to analyze the transport characteristics. Transmission intensity depend on the radius of the capirally and also on the curvature of the fiber setting. The transmission of longer wavelength neutrons increases with the radius. Simulation indicated that the wavelength dependence of transmission could not be explained by ideal condition of the fiber and we needed to introduce distorsion in the fiber, such as waving. These data are very useful to make devices using multi-capiraly fiber.
    Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (B)., Hokkaido University, 11480119