Construction of radiation damage model for high-energy region

• Project/Area Number: 16H04638
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Nuclear engineering
• Research Institution: Japan Atomic Energy Agency
• Principal Investigator: Iwamoto Yosuke 国立研究開発法人日本原子力研究開発機構, 原子力科学研究部門 原子力科学研究所 原子力基礎工学研究センター, 研究主幹 (10391327)
• Co-Investigator(Kenkyū-buntansha): 栗山 靖敏 京都大学, 複合原子力科学研究所, 助教 (60423125) ; 吉田 誠 大学共同利用機関法人高エネルギー加速器研究機構, 素粒子原子核研究所, 研究機関講師 (70379303)
• Research Collaborator: Yoshiie Toshimasa ; Yashima Hiroshi ; Matsuda Hiroki ; Meigo Shin-ichiro ; Satoh Daiki ; Yabuuchi Atsushi ; Kinomura Atsushi ; Shima Tatsushi ; Nakamoto Tatsushi ; Ogitsu Toru
• Project Period (FY): 2016-04-01 – 2019-03-31
• Project Status: Completed (Fiscal Year 2018)
• Budget Amount: ¥13,260,000 (Direct Cost: ¥10,200,000、Indirect Cost: ¥3,060,000); Fiscal Year 2018: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000); Fiscal Year 2017: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000); Fiscal Year 2016: ¥9,360,000 (Direct Cost: ¥7,200,000、Indirect Cost: ¥2,160,000)
• Keywords: 照射損傷 / はじき出し断面積 / DPA / 高エネルギー / 電気抵抗 / 極低温 / 高エネルギー陽子 / 照射試験 / PHITS / はじき出し損傷 / RCNP

Outline of Final Research Achievements

To develop radiation damage model for life time evaluation of materials under high-energy proton irradiation, we measured displacement cross sections of aluminum, copper and tungsten under 200 - 400 MeV proton irradiation with our small cryogenic irradiation chamber without cooling coolant. We also extended our radiation damage model to high-energy region. As a result, calculation with new radiation damage model reproduced the experimental data well compared with conventional model.

Academic Significance and Societal Importance of the Research Achievements

本成果から、高エネルギー陽子に対する材料の寿命評価が明確となることで、世界の大強度・高エネルギー陽子を用いた実験施設での標的等の交換頻度やビーム利用率の正確な評価が可能となり、損傷による加速器の放射線事故や機器の故障を未然に防ぐことが期待される。標的等の安全な管理が可能となることで、中性子などの二次粒子を利用した新しい極微の世界を探求する研究が推進される。その結果、物理学、生物学などの基礎科学の発展に貢献することが期待されるため、本成果は社会的に大きな意義を持つと考えられる。

Research Products

• [Journal Article] Measurement of displacement cross sections of aluminum and copper at 5 K by using 200 MeV protons (2018)
  • Author(s): Yosuke Iwamoto, Makoto Yoshida , Toshimasa Yoshiie , Daiki Satoh, Hiroshi Yashima, Hiroki Matsuda, Shin-ichiro Meigo, Tatsushi Shima
  • Journal Title: Journal of Nuclear Materials Volume: 508 Pages: 195-202
  • DOI: 10.1016/j.jnucmat.2018.05.038
  • Peer Reviewed
• [Journal Article] RADIATION DAMAGE CALCULATION IN PHITS AND BENCHMARKING EXPERIMENT FOR CRYOGENIC-SAMPLE HIGH-ENERGY PROTON IRRADIATION (2018)
  • Author(s): Y. Iwamoto, H. Matsuda, S. Meigo, D. Satoh, T. Nakamoto, M. Yoshida, Y. Ishi, Y. Kuriyama, T. Uesugi, H. Yashima, T. Yoshiie, T. Shima, R. M. Ronningen, K. Niita
  • Journal Title: Proceedings of the 61st ICFA Advanced Beam Dynamics Workshop on High-Intensity and High-Brightness Hadron Beams Volume: － Pages: 116-121
  • DOI: 10.18429/JACOW-HB2018-TUP2WE03
  • Open Access / Int'l Joint Research
• [Journal Article] Implementing displacement damage calculations for electrons and gamma rays in the Particle and Heavy-Ion Transport code System (2018)
  • Author(s): Yosuke Iwamoto
  • Journal Title: Nuclear Instruments and Methods in Physics Research Section B Volume: 419 Pages: 32-37
  • DOI: 10.1016/j.nimb.2018.01.028
  • Peer Reviewed
• [Presentation] Radiation damage calculation in PHITS and benchmarking experiment for cryogenic-sample high-energy proton irradiation (2018)
  • Author(s): Y. Iwamoto, H. Matsuda, S. Meigo, D. Satoh, T. Nakamoto, M. Yoshida, Y. Ishi, Y. Kuriyama, T. Uesugi, H. Yashima, T. Yoshiie, T. Shima, R. M. Ronningen, K. Niita
  • Organizer: 61st ICFA Advanced Beam Dynamics Workshop on High-Intensity and High-Brightness Hadron Beams (HB 2018)
  • Int'l Joint Research / Invited
• [Presentation] Benchmarking experiments of displacement cross sections for high-energy proton irradiation with cryogenic-sample (2018)
  • Author(s): Y. Iwamoto
  • Organizer: The 14th Specialists' workshop on Shielding aspects of Accelerators, Targets and Irradiation Facilities (SATIF-14)
  • Int'l Joint Research
• [Presentation] Measurements of Displacement Cross Section and Damage Recovery of Tungsten under 389-MeV Proton Irradiation at Cryogenic Temperature (2018)
  • Author(s): Yosuke IWAMOTO, Makoto YOSHIDA, Hiroki MATSUDA, Shin-ichiro MEIGO, Daiki SATOH, Hiroshi YASHIMA, Atsushi YABUUCHI, Atsushi KINOMURA, Toshimasa YOSHIIE, Tatsushi SHIMA
  • Organizer: 14th International Workshop on Spallation Materials Technology (IWSMT-14)
  • Int'l Joint Research
• [Presentation] 極低温高エネルギー陽子照射装置の開発と200MeV陽子を用いたはじき出し断面積測定 (2018)
  • Author(s): 岩元洋介、吉田誠、義家敏正、佐藤大樹、八島浩、松田洋樹、明午伸一郎、嶋達志
  • Organizer: 日本原子力学会2018年春の年会
• [Presentation] Introduction of IAEA Coordinated Research Project; Primary radiation damage cross sections (2017)
  • Author(s): Yosuke Iwamoto
  • Organizer: Workshop on Radiation Effects in Superconducting Magnet Materials 2017 (RESMM '17)
  • Int'l Joint Research
• [Presentation] Introduction of radiation damage estimation in high energy region using the PHITS code (2017)
  • Author(s): Yosuke Iwamoto
  • Organizer: 10th International Workshop on Neutrino Beams and Instrumentation (NBI 2017) + 4th RaDIATE Meeting
  • Int'l Joint Research