Elucidation of formation mechanisms of tungsten lattice defects under low-energy and dense hydrogen implantation

• Project/Area Number: 22560821
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Nuclear fusion studies
• Research Institution: National Institute for Fusion Science
• Principal Investigator: KATO Daiji 核融合科学研究所, ヘリカル研究部, 准教授 (60370136)
• Project Period (FY): 2010 – 2012
• Project Status: Completed (Fiscal Year 2012)
• Budget Amount: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000); Fiscal Year 2012: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2011: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000); Fiscal Year 2010: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
• Keywords: タングステン / 格子欠陥 / 水素効果 / 第一原理計算 / 炉内機器材料 / 水素吸蔵

Research Abstract

Tungsten vacancies and its interaction with hydrogen atoms were characterized based on results from first-principle simulations of a bulk tungsten containing an extraordinary high concentration of the hydrogen atoms and the vacancies. Hydrogen effects on formation and distribution of lattice defects in the bulk tungsten were evaluated quantitatively. Present results are relevant to hitherto unknown physical mechanisms which may explain anomalous behaviors of lattice defects and enhanced hydrogen retentions found in the tungsten exposed to a high flux and a large fluence of hydrogen ions, that is a big issue in nuclear fusion reactor materials researches.

Research Products

• [Journal Article] 炉内トリチウム (2012)
  • Author(s): 上田良夫
  • Journal Title: プラズマ・核融合学会誌 Volume: 88 Pages: 484-502
• [Journal Article] Ion-Beam Induced Luminescence and Damage of Er₂O₃ (2012)
  • Author(s): D. Kato
  • Journal Title: Plasma and Fusion Research Volume: 7 Issue: 0 Pages: 2405043-2405043
  • DOI: 10.1585/pfr.7.2405043
  • NAID: 130003383863
  • ISSN: 1880-6821
  • Peer Reviewed
• [Journal Article] Ion-beam Damage and Luminescence of Functional Materials for Fusion Reactors (2012)
  • Author(s): 加藤太治
  • Journal Title: Annual Report of National Institutr for Fusion Science Volume: November 2012 Pages: 298-298
• [Journal Article] Formation of vacancy clusters in tungsten crystals under hydrogen-rich condition (2011)
  • Author(s): Kato D, et al
  • Journal Title: Journal of Nuclear Materials Volume: 417 Issue: 1-3 Pages: 1115-1118
  • DOI: 10.1016/j.jnucmat.2010.12.211
  • Peer Reviewed
• [Journal Article] Interstitial Diffusion of C Interacting with Ambient H in Tungsten Crystals (2011)
  • Author(s): Kato D, et al
  • Journal Title: Plasma and Fusion Research Volume: 6 Pages: 2405062-2405062
  • DOI: 10.1585/pfr.6.2405062
  • NAID: 130002059578
  • ISSN: 1880-6821
  • Peer Reviewed
• [Journal Article] Formation of vacancy clusters in tungsten crystals under hydrogen-rich condition (2011)
  • Author(s): D. Kato, H. Iwakiri, K. Morishita
  • Journal Title: Journal of Nuclear Materials Volume: Vol.415 Issue: 1 Pages: S1162-S1165
  • DOI: 10.1016/j.jnucmat.2010.12.239
  • Peer Reviewed
• [Journal Article] Linear polarization of photons emitted from excited hydrogen atoms formed above metal surfaces (2010)
  • Author(s): 加藤太治
  • Journal Title: Contributions to Plasma Physics Volume: 50 Pages: 445-450
  • Peer Reviewed
• [Journal Article] Linear polarization of photon emission from reflected neutrals of atomic hydrogen at metal PFCs (2010)
  • Author(s): 加藤太治
  • Journal Title: NIFS-PROC Volume: 81 Pages: 150-161
• [Journal Article] First-principle calculation of di-vacancy formation in tungsten (2010)
  • Author(s): 加藤太治
  • Journal Title: Annual Report of National Institute for Fusion Science Volume: April2009-March2010 Pages: 424-424
• [Presentation] Theoretical models for electronic excitation and photon emission of super-thermal atomic hydrogen formed at metal surfaces (2012)
  • Author(s): 加藤太治
  • Organizer: The 8th EU-Japan Symposium on Plasma Processing (JSPP2012)
  • Place of Presentation: 東大寺総合文化センター(奈良)
  • Year and Date: 2012-01-17
• [Presentation] First-principle calculation of hydrogen interaction with dissolved carbon atoms in tungsten lattice (2010)
  • Author(s): 加藤太治
  • Organizer: 20th International Toki Conference on Advanced Physics in Plasma and Fusion Research
  • Place of Presentation: セラトピア土岐(岐阜県)
  • Year and Date: 2010-12-08
• [Presentation] タングステン中に固溶した不純物原子と水素相互作用の第一原理計算 (2010)
  • Author(s): 加藤太治
  • Organizer: プラズマ・核融合学会第27回年会
  • Place of Presentation: 北海道大学
  • Year and Date: 2010-11-30
• [Presentation] タングステン中に固溶した不純物原子と水素相互作用の第一原理計算 (2010)
  • Author(s): 加藤太治
  • Organizer: プラズマ・核融合学会第27回年会
  • Place of Presentation: 北海道大学(札幌市)
  • Year and Date: 2010-11-30
• [Presentation] First-principle Calculations of Hydrogen Interaction with Vacancies and Dissolved Atoms in Tungsten (2010)
  • Author(s): D. Kato
  • Organizer: Joint International Conference on Supercomputing in Nuclear Applications and Monte Carlo 2010
  • Place of Presentation: 一ツ橋記念ホール
  • Year and Date: 2010-10-19
• [Presentation] First-principle Calculations of Hydrogen Interaction with Vacancies and Dissolved Atoms in Tungsten (2010)
  • Author(s): 加藤太治
  • Organizer: Joint International Conference on Supercomputing in Nuclear Applications and Monte Carlo 2010
  • Place of Presentation: 一ツ橋記念ホール(東京都)
  • Year and Date: 2010-10-19
• [Presentation] Vacancy formation and hydrogen trapping in tungsten (2010)
  • Author(s): 加藤太治
  • Organizer: IAEA 3rd Research Coordination Meeting on "Data for surface composition dynamics relevant to erosion processes"
  • Place of Presentation: IAEA本部(オーストリア)
  • Year and Date: 2010-09-13
• [Presentation] 磁場核融合炉プラズマ対向壁と水素相互作用の原子過程とシミュレーション (2010)
  • Author(s): 加藤太治
  • Organizer: 第8回核融合エネルギー連合講演会
  • Place of Presentation: 高山市民文化会館
  • Year and Date: 2010-06-11
• [Presentation] 磁場核融合炉プラズマ対向壁と水素相互作用の原子過程とシミュレーション (2010)
  • Author(s): 加藤太治
  • Organizer: 第8回核融合エネルギー連合講演会
  • Place of Presentation: 高山市民文化会館(岐阜県)
  • Year and Date: 2010-06-11
• [Presentation] Ab-initio calculation on hydrogen effects in pure iron and tungsten
  • Author(s): 加藤太治
  • Organizer: Meeting of JAEA-ORNL research collaboration
  • Place of Presentation: 京都大学エネルギー理工学研究所（京都府宇治市）
  • Invited
• [Presentation] Er2O3のイオンビーム照射損傷による光学特性の変化
  • Author(s): 加藤太治
  • Organizer: 第9回核融合エネルギー連合講演会
  • Place of Presentation: 神戸国際会議場（兵庫県神戸市）
• [Presentation] Ionoluminescence of a thin rear-earth oxide film by slow highly-charged ions
  • Author(s): 加藤太治
  • Organizer: 25th International Conference on Atomic Collisions in Solids
  • Place of Presentation: 京都大学吉田キャンパス（京都府京都市）
• [Presentation] 液体ブランケットセラミックコーティングのイオンビーム誘起蛍光
  • Author(s): 加藤太治
  • Organizer: プラズマ・核融合学会第29回年会
  • Place of Presentation: クローバープラザ（福岡県春日市）
• [Presentation] ベリリウム金属間化合物中における水素の存在状態
  • Author(s): 岩切宏友
  • Organizer: 京都大学原子炉実験所ワークショップ 「材料照射効果と応用」
  • Place of Presentation: 京都大学原子炉実験所（大阪府熊取町）