Development of nondestructive investigation technology by using neutrons generated by laser driven photo nuclear reaction

2016 Fiscal Year Annual Research Report

• Project/Area Number: 26246043
• Research Institution: Osaka University
• Principal Investigator: 西村 博明 大阪大学, レーザーエネルギー学研究センター, 教授 (60135754)
• Co-Investigator(Kenkyū-buntansha): 三間 圀興 光産業創成大学院大学, その他の研究科, 特任教授 (30033921) ; 阪部 周二 京都大学, 化学研究所, 教授 (50153903) ; 大竹 淑恵 国立研究開発法人理化学研究所, 光量子工学研究領域, チームリーダー (50216777) ; 余語 覚文 大阪大学, レーザーエネルギー学研究センター, 准教授 (50421441) ; 中井 光男 大阪大学, レーザーエネルギー学研究センター, 教授 (70201663) ; 有川 安信 大阪大学, レーザーエネルギー学研究センター, 講師 (90624255)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: 中性子ラジオグラフィ / レーザー駆動中性子 / 光核反応

Outline of Annual Research Achievements

本研究の目的は、レーザー生成高速電子が物質を運動する過程で放つ高エネルギー制動放射X線により、二次的に発生する中性子の発数を向上させるとともに、時間分解中性子イメージング検出器を開発することにより、最終的に30cm厚さの鉄筋コンクリートの中性子ラジオグラフィの可能性を調べることにある。
本年度における中性子発生に関しては、京都大学化学研・阪部研究室のT6レーザーを用いた光核反応中性子発生に関する実験を行った。高速電子の発生量ならびにスペクトル勾配温度を増すため、主レーザーパルス投入前にナノ秒の先行パルスを照射してプレプラズマを発生させる手法を試みた。その結果、500ｍJもの僅かなエネルギーで10＾4個の中性子発生を得た。この値は将来100J繰り返しレーザーによる大型検体の中性子ラジオグラフィに必要とされるレーザー1ショット当たり10＾6個を超える中性子数に匹敵する。
平行して、ハニカム構造材に液体シンチレータを浸潤させたパネルからの出力画像をゲート付きCCDカメラ(ICCDカメラ）で撮像する「時間分解中性子画像装置」において、蛍光体からICCDカメラまでの光伝送効率を改善するための像転送用光学系の改善を試みた。この実験では大阪大学LINACを用いて制動放射X線ならびに光核反応中性子を発生させ、コンクリートやプラスティックブロック、水を満たしたバケツなどの撮像を行った。従来の手法に比べて改善は見られたが、さらなる「明るさ（出力信号の強度）」が必要であることも判明した。このため、アバランシュフォトダイオードアレーを用いた時間弁別機能をもった光検出器の開発の着想を得た。

Research Progress Status

28年度が最終年度であるため、記入しない。

Strategy for Future Research Activity

28年度が最終年度であるため、記入しない。

Research Products

• [Int'l Joint Research] 中国科学院物理学研究所(中国)
  • Country Name: CHINA
  • Counterpart Institution: 中国科学院物理学研究所
• [Journal Article] Boosting laser-ion acceleration with multi-picosecond pulses (2017)
  • Author(s): A. Yogo, K. Mima, N. Iwata, S. Tosaki, A. Morace, Y. Arikawa, S. Fujioka, T. Johzaki, Y. Sentoku, H. Nishimura, A. Sagisaka, K. Matsuo, N. Kamitsukasa, S. Kojima, H. Nagatomo, M. Nakai, H. Shiraga, 他10名
  • Journal Title: Scientific Reports Volume: 7 Pages: 42451-1~10
  • DOI: 10.1038/srep4251
  • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Large-aperture fast-neutron imaging detector with 10-ns time resolution (2017)
  • Author(s): Y. Arikawa, S. Matsubara, Y. Abe, Y. Kato, H. Kishimoto, A. Yogo, H. Nihsimura, M. Nakai, H. Shiraga, S. Fujioka, H. Azechi, Y. Otake, K. Mima, Y. Honda
  • Journal Title: Proc SPIE 10328, Selected Papers from the 31st International Congress on High Speed Imaging and Photonics Volume: 10328oT Pages: 10328oT
  • DOI: 10.1117/12.2270527
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Integrated simulation of magnetic-field-assist fast ignition laser fusion (2017)
  • Author(s): T. Johzaki, H. Nagatomo, A. Sunahara, Y. Sentoku, H. Sakagami, M. Hata, T. Taguchi, K. Mima, Y. Kai, D. Ajimi, T. Isoda, T. Endo, A. Yogo, Y. Arikawa, S. Fujioka, H. Shiraga, and, H. Azechi
  • Journal Title: Plasma Phys. Control. Fusion Volume: 59 Pages: 014045-1~8
  • DOI: 10.1088/0741-3335/59/1/014045
  • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Visualization of water in corroded region of painted steels at a compact neutron source (2017)
  • Author(s): A. Taketani, M. Yamada, Y. Ikeda, T. Hashiguchi, H. Sunaga, Y. Wakabayashi, S. Ashigai, M. Takamura, S. Mihara, S. Yanagimachi, Y. Otake, T. Wabayashi, K. Kono, and T. Nakayama
  • Journal Title: ISIJ International Volume: 1 Pages: 155-161
  • DOI: 10.2355/isijinternational
  • Peer Reviewed / Open Access
• [Journal Article] Ultrahigh-contrast kilojoule-class petawatt LFEX laser using a plasma mirror (2016)
  • Author(s): Y. Arikawa, S. Kojima, A. Morace, S. Sakata, T. Gawa, Y. Taguchi, Y. Abe, Z. Zhang, 他40名
  • Journal Title: Applied Optics Volume: 55 Pages: 6850-6857
  • DOI: 10.1364/AO.55.006850
  • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Microstructured boron foil scintillating G-GEM detector for neutron imaging (2016)
  • Author(s): T. Fujiwara, U. Bautista, Y. Mitsuya, H. Takahashi, N. L. Yamada, Y. Otake, A. Taketani, M. Uesaka, H. Toyokawa
  • Journal Title: Nuclear Inst. and Methods in Physics Research, A Volume: 838 Pages: 124-128
  • DOI: 10.1016/j.nima.2016.09.00
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] The Influence of Strain Rate and Strain on the Behavior of Stress Relaxation in 980 MPa-Grade Dual Phase Steel Sheets (2016)
  • Author(s): K. Murasawa, H. Komine, Y. Otake, H. Sunaga, M. Takamura, Y. Ikeda, and S. Suzuki
  • Journal Title: Key Engineering Materials Volume: 716 Pages: 948-953
  • DOI: 10.4028/www.scientific.net/KEM.716.948
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Prospect for application of compact accelerator-based neutron source to neutron engineering diffraction (2016)
  • Author(s): Y. Ikeda, M. Takamura, A. Taketani, H. Sunaga, Y. Otake, H. Suzuki, M. Kumagai, Y. Oba
  • Journal Title: Nucl. Instr. Meth. A Volume: 833 Pages: 61-67
  • DOI: /10.1016/j.nima.2016.06.127
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Presentation] 小型中性子源によるコンクリートに浸透する水のイメージング (2017)
  • Author(s): 吉村雄一、水田真紀、須長秀行、大竹淑恵、林崎規託
  • Organizer: 日本原子力学会2017年春の年会
  • Place of Presentation: 東海大学湘南キャンパス
  • Year and Date: 2017-03-27 – 2017-03-27
• [Presentation] 理研小型中性子源による鉄鋼材料解析 (2017)
  • Author(s): 大竹淑恵
  • Organizer: 日本物理学会第72回年次大会・ビーム物理領域
  • Place of Presentation: 大阪大学
  • Year and Date: 2017-03-20 – 2017-03-20
  • Invited
• [Presentation] J-PARC産業利用ビームライン 小型中性子源活用法「現場で使える理研小型中性子源RANSの実用化へ向けた挑戦」 (2016)
  • Author(s): 大竹淑恵
  • Organizer: 日本中性子科学会大第16回年会
  • Place of Presentation: 名古屋大学
  • Year and Date: 2016-12-02 – 2016-12-02
  • Invited
• [Presentation] 10-ns time resolution fast-neutron imaging detector (2016)
  • Author(s): Y. Arikawa, S. Matsubara, Y. Kato, H. Kishimoto, Y.Abe, A. Yogo, H.Nihsimura, M. Nakai, H.Shiraga, S. Fujioka, H.Azechi, Y. Otake, K. Mima
  • Organizer: International Conference on High Speed Imaging and Photonics
  • Place of Presentation: Osaka, Japan
  • Year and Date: 2016-11-09 – 2016-11-09
  • Int'l Joint Research / Invited
• [Presentation] Compact neutron system on site -RANS towards industrial use and social infrastructure safety (2016)
  • Author(s): Yoshie Otake
  • Organizer: 6th International Meeting of Union for Compact Accelerator-Driven Neutron Sources
  • Place of Presentation: Xi'an China
  • Year and Date: 2016-10-27 – 2016-10-27
  • Invited
• [Presentation] Analysis of efficient ion acceleration with multi-picosecond LFEX laser (2016)
  • Author(s): N.Iwata, K.Mima, A.Yogo, H.Nagatomo, Y.Sentoku
  • Organizer: 58th Annual Meeting of the APS Division of Plasma Physics
  • Place of Presentation: Seatle, USA
  • Year and Date: 2016-10-23 – 2016-10-27
  • Int'l Joint Research
• [Presentation] Laser-driven ion acceleration on LFEX for fast ignition: State of the art and applications (2016)
  • Author(s): A. Yogo, N. Iwata, K. Mima, A. Morace, S. Tosaki, S. Fujioka, Y. Arikawa, Y. Abe, S. Kojima, S. Sakata, 他25名
  • Organizer: The 26th IAEA Fusion Energy Conference
  • Place of Presentation: Kyoto, Japan
  • Year and Date: 2016-10-17 – 2016-10-21
  • Int'l Joint Research
• [Presentation] A New Research Project on Laser-Driven Neutron sources and applications at ILE, Osaka University (2016)
  • Author(s): M. Nakai, Y. Arikawa, A. Yogo, Y. Abe, Y. Kato, S. Matsubara, S. Tosaki, K. Koga, N. Iwata, H. Nagatomo, A. Morace, K. Mima, Y. Otake, S. Miyamoto and H. Nihsimura
  • Organizer: Nuclear Photonics 2016
  • Place of Presentation: Monterey, California, USA
  • Year and Date: 2016-10-16 – 2016-10-21
  • Int'l Joint Research
• [Presentation] Improvement in the heating efficiency of fast ignition inertial confinement fusion by suppressing the preformed plasma (2016)
  • Author(s): Y. Arikawa, S. Kojima, A. Morace, M. Hata, S. Sakata, S. Fujioka, T. Kawashima, 他32名
  • Organizer: IAEA-fusion energy conference
  • Place of Presentation: Kyoto, Japan
  • Year and Date: 2016-10-16 – 2016-10-16
  • Int'l Joint Research
• [Presentation] RIKEN Accelertor-driven Compact Neutron Source, RANS and its Practical Applications(ID263) (2016)
  • Author(s): Yoshie OTAKE
  • Organizer: Deutsche Neutronenstreutagung 2016
  • Place of Presentation: Kiel, Germany
  • Year and Date: 2016-09-20 – 2016-09-20
  • Int'l Joint Research / Invited
• [Presentation] Anomalous Electron Heating and Ion Acceleration with High-Contrast laser pulses on LFEX (2016)
  • Author(s): A. Yogo, K. Mima, N. Iwata, S. Tosaki, A. Morace,Y. Arikawa, S. Fujioka, H. Nishimura, A. Sagisaka, T. Johzaki, K. Matsuo, 他15名
  • Organizer: The 34th European Conference on Laser Interaction with Matter (ECLIM2016)
  • Place of Presentation: Moscow, Russia
  • Year and Date: 2016-09-19 – 2016-09-19
  • Int'l Joint Research / Invited
• [Presentation] Novel Compact Neutron Source, RANS, for Practical Use with Thermal and Fast neutrons (2016)
  • Author(s): Yoshie OTAKE
  • Organizer: BIT’s 5th Annual World Congress of Advanced Materials-2016
  • Place of Presentation: Chongqing, China
  • Year and Date: 2016-06-06 – 2016-06-06
  • Int'l Joint Research / Invited
• [Presentation] Research and development of RIKEN Accelerator-driven compact Neutron Source and its practical applications (2016)
  • Author(s): Yoshie OTAKE
  • Organizer: Symposium RIKEN/COPL/INO
  • Place of Presentation: Quebec, Canada
  • Year and Date: 2016-05-26 – 2016-05-26
  • Int'l Joint Research / Invited
• [Presentation] Ultrafast electron diffraction and deflectometry with laser accelerated electrons (2016)
  • Author(s): S. Sakabe
  • Organizer: Optics and Photonics International Conference (OPIC)
  • Place of Presentation: Yokohama, Japan
  • Year and Date: 2016-05-17 – 2016-05-20
  • Int'l Joint Research / Invited
• [Presentation] Anomalous Electron Heating and Ion Acceleration with High-Contrast laser pulses on LFEX (2016)
  • Author(s): A. Yogo
  • Organizer: Conference on Laser Energy Science 2106
  • Place of Presentation: Yokohama, Japan
  • Year and Date: 2016-05-17 – 2016-05-17
  • Int'l Joint Research / Invited
• [Presentation] RIKEN Accelerator-driven compact neutron source and its practical applications (2016)
  • Author(s): Yoshie OTAKE
  • Organizer: Forum on Advanced Nuclear Science and Technology
  • Place of Presentation: Xi’an, China
  • Year and Date: 2016-04-09 – 2016-04-09
  • Int'l Joint Research / Invited