Dynamic behavior of surface atoms under irradiation by using a linked facility between an ion accelerator and STM

• Project/Area Number: 22686088
• Research Category: Grant-in-Aid for Young Scientists (A)
• Allocation Type: Single-year Grants
• Research Field: Nuclear engineering
• Research Institution: The University of Tokyo
• Principal Investigator: OKITA Taira 東京大学, 人工物工学研究センター, 准教授 (50401146)
• Project Period (FY): 2010 – 2012
• Project Status: Completed (Fiscal Year 2012)
• Budget Amount: ¥19,890,000 (Direct Cost: ¥15,300,000、Indirect Cost: ¥4,590,000); Fiscal Year 2011: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000); Fiscal Year 2010: ¥17,550,000 (Direct Cost: ¥13,500,000、Indirect Cost: ¥4,050,000)
• Keywords: STM , ナノ組織 / 計算科学 / 非平衡科学 / 表面物理 / STM / ナノ組織 / 走査型トンネル顕微鏡 / 表面科学 / 非平衡物理 / ナノテクノロジー / 照射損傷 / 原子力材料

Research Abstract

Surface defects on Au(111) formed by ion irradiation were observed at an atomistic resolution by scanning tunnel microscope combined with an ion accelerator. The step-height method with this equipment enabled to identify the nature of defects and to quantify their size. Molecular simulations were conducted with equivalent conditions to the experiments, and it was clarified that the results were reasonably consistent with the experimental observations. This comparison attested the validity of the simulations under non-equilibrium states.

Research Products

• [Journal Article] Development of a non-destructive inspection method for irradiation-induced microstructural evolution of thick 304 stainless steel blocks (2013)
  • Author(s): J. Etoh, M. Sagisaka, T. Matsunaga, Y. Isobe, F.A. Garner, P.D. Freyer. Y. Huang, J.M.K. Wiezorek, T. Okita
  • Journal Title: Journal of Nuclear Materials Volume: in press Issue: 1-3 Pages: 500-507
  • DOI: 10.1016/j.jnucmat.2013.02.036
  • Peer Reviewed
• [Journal Article] MD simulations to evaluate the influence of normal strain on defect production at various PKA energies", (2012)
  • Author(s): S. Miyashiro, S. Fujita, T. Okita, H.Okuda
  • Journal Title: Fusion Engineering and Design Volume: 87 Pages: 1352-1355
• [Journal Article] アセンブリ構造解析のための多点拘束前処理付き並列反復解 (2012)
  • Author(s): 後藤和哉,志賀 淳二,林雅江,沖田泰良,奥田 洋司
  • Journal Title: 日本機械学会論文集 Volume: 第78巻789号 Pages: 708-717
• [Journal Article] MD simulations to evaluate effects of applied tensile strain on irradiation-induced defect production at various PKA energies (2012)
  • Author(s): S. Miyashiro, S. Fujita, T. Okita, H. Okuda
  • Journal Title: Fusion Engineering and Design Volume: 87 Issue: 7-8 Pages: 1352-1355
  • DOI: 10.1016/j.fusengdes.2012.03.012
  • Peer Reviewed
• [Journal Article] Parallel Iterative Equation Solver with Multi-Point Constraint Preconditioning for Assembled Structural Analysis (2012)
  • Author(s): 後藤和哉，志賀 淳二，林雅江，沖田泰良，奥田 洋司
  • Journal Title: TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series A Volume: 78 Issue: 789 Pages: 708-717
  • DOI: 10.1299/kikaia.78.708
  • NAID: 130002050296
  • ISSN: 0387-5008, 1884-8338
  • Peer Reviewed
• [Journal Article] Molecular dynamics simulations to evaluate the effect of applied strain on interstitial cluster formation and orientation under collision cascade damage (2012)
  • Author(s): S. Miyashiro, S. Fujita, M. Itakura, T. Okita
  • Journal Title: Proceedings of 20th International Conference on Nuclear Engineering Volume: ICONE20- POWER2012-54777
  • Peer Reviewed
• [Journal Article] Molecular dynamics simulations to evaluate the effect of the difference in material properties on irradiation-induced defect formation under applied strain (2012)
  • Author(s): T. Horinouchi, S. Miyashiro, M. Itakura, T. Okita
  • Journal Title: Proceedings of 20th International Conference on Nuclear Engineering Volume: ICONE20- POWER2012-54840
  • Peer Reviewed
• [Journal Article] Direct observation of irradiation-induced defect fortmation on a Si (111) surface by a linked facility between an ion accelerator and STM (2012)
  • Author(s): M. Sato, T. Kikuchi, K. Murakami, S. Miyashiro, T. Okita
  • Journal Title: Proceedings of 20th International Conference on Nuclear Engineering Volume: ICONE20- POWER2012-55025
  • Peer Reviewed
• [Journal Article] MD simulations to evaluate the influence of applied normal stress or deformation on defect production rate and size distribution of clusters in cascade process for pure Cu (2011)
  • Author(s): S. Miyashiro, S. Fujita, T. Okita
  • Journal Title: Journal of Nuclear Materials Volume: 415 Pages: 1-4
• [Journal Article] Effects of dpa rate on swelling in neutron-irradiated Fe-Cr and Fe-Cr-Mo alloys (2011)
  • Author(s): T. Okita, N. Sekimura, F.A. Garner,
  • Journal Title: Journal of Nuclear Materials Volume: 417 Pages: 944-948
• [Journal Article] Development of Nondestructive Inspection Techniques for Measurement of Void Swelling in Irradiated Microscopy Discs (2011)
  • Author(s): M. Sagisaka, Y. Isobe, F.A. Garner, S.Fujita, T. Okita
  • Journal Title: Journal of Nuclear Materials Volume: 417 Pages: 992-995
• [Journal Article] Swelling of pure vanadium and V-5Cr at～430℃ in response to variations in neutron-flux-spectra in FFTF (2011)
  • Author(s): F.A.Garner, T.Okita, N, Sekimura
  • Journal Title: Journal of Nuclear Materials Volume: 417 Pages: 314-318
  • Peer Reviewed
• [Journal Article] Development of nondestructive inspection techniques for measurement of void swelling in irradiated microscopy disks (2011)
  • Author(s): M.Sagisaka, Y.Isobe, F.A.Garner, S.Fujita, T.Okita
  • Journal Title: Journal of Nuclear Materials Volume: 417 Pages: 992-995
  • Peer Reviewed
• [Journal Article] Development of a non-destructive inspection method for irradiation-induced microstructural evolution of thick 304 stainless steel blocks
  • Author(s): J. Etoh, M. Sagisaka, T. Matsunaga, Y. Isobe, F.A. Garner, P.D. Freyer. Y. Huang, J.M.K. Wiezorek, T. Okita
  • Journal Title: Journal of Nuclear Materials
• [Journal Article] Molecular dynamics simulations to evaluate the effect of applied strain on interstitial cluster formation and orientation under collision cascade damage
  • Author(s): S. Miyashiro, S. Fujita, M. Itakura, T.Okita
  • Journal Title: Proceedings of 2012 20th International Conference on Nuclear Engineering
• [Journal Article] Molecular dynamics simulations to evaluate the effect of the difference in material properties on irradiation-induced defect formation under applied strain
  • Author(s): T. Horinouchi, S. Miyashiro, M. Itakura, T.Okita
  • Journal Title: Proceedings of 2012 20th International Conference on Nuclear Engineering
• [Journal Article] Direct observation of irradiation-induced defect fortmation on a Si (111) surface by a linked facility between an ion accelerator and STM",
  • Author(s): M. Sato, T. Kikuchi, K. Murakami, S.Miyashiro, T. Okita
  • Journal Title: Proceedings of 2012 20th International Conference on Nuclear Engineering,
• [Presentation] 原子炉材料劣化予測モデル構築のためのはじき出し損傷過程の実験的解明 (2013)
  • Author(s): 平林潤一，佐藤元洋，宮代 聡，村上健太，沖田泰良
  • Organizer: 日本原子力学会第六回関東甲越地区学生研究発表会
  • Place of Presentation: 東京
• [Presentation] Distribution of void swelling in thick 304 stainless steel blocks in response to spatial gradients in neturon flux-spectra, gamma heating and irradiation temperature (2013)
  • Author(s): F.A. Garner, P.D. Freyer, D.L. Porter, J. Wiest, C. Knight, B.H. Sencer, T. Okita, M. Sagisaka, Y. Isobe, J. Etoh, T. Matsunaga, Y. Huang, J. Wiezorek
  • Organizer: TMS 2013, 142nd Annual Meeting and Exhibition, Linking Science and Technology for Global Solution
  • Place of Presentation: San Antonio, TX, USA
• [Presentation] イオン加速器連結型STMによる表面はじき出し損傷の原子レベルでの観察(2) (2013)
  • Author(s): 佐藤元洋，平林潤一，村上健太，沖田泰良
  • Organizer: 日本原子力学会2013年春の大会
  • Place of Presentation: 大阪
• [Presentation] FBR中性子照射条件下のオーステナイト鋼に於けるボイド組織発達モデル構築に関する研究 (2013)
  • Author(s): 細川 哲，西尾慶太，宮代 聡，沖田泰良
  • Organizer: 日本原子力学会2013年春の大会
  • Place of Presentation: 大阪
• [Presentation] 原子炉構造材料の実時間スケールに対応した革新的照射劣化予測手法の開発 (2013)
  • Author(s): 細川 哲，西尾慶太，宮代 聡，沖田泰良
  • Organizer: 日本原子力学会2013年春の大会 学生ポスターセッション
  • Place of Presentation: 大阪
• [Presentation] 動力学解析を用いた欠陥方位変化挙動に及ぼす応力影響の解明 (2013)
  • Author(s): 宮代 聡，藤田 智，沖田泰良，板倉充洋
  • Organizer: 日本金属学会2013年春期大会
  • Place of Presentation: 東京
• [Presentation] 分子動力学法を用いたFCC金属の格子間原子集合体吸収過程に及ぼすSFEの影響 (2013)
  • Author(s): 北原直明，浅利圭亮，宮代 聡，沖田泰良
  • Organizer: 日本金属学会2013年春期大会
  • Place of Presentation: 東京
• [Presentation] 分子動力学法を用いたFCC金属中のボイドと刃状転位の相互作用に及ぼすSFEの影響 (2013)
  • Author(s): 浅利圭亮，堀之内利浩，宮代 聡，板倉充洋，沖田泰良
  • Organizer: 日本金属学会2013年春期大会
  • Place of Presentation: 東京
• [Presentation] 米国実験炉廃材を用いた照射下ミクロ組織の非破壊定量手法の開発-(1)実験的検討 (2012)
  • Author(s): 匂坂充行、江藤淳二、松永嵩、枝川文哉、磯部仁博、沖田泰良
  • Organizer: 日本原子力学会2012年春の大会
  • Place of Presentation: 福井
  • Year and Date: 2012-03-20
• [Presentation] 米国実験炉廃材を用いた照射下ミクロ組織の非破壊定量手法の開発-(2)理論的検討 (2012)
  • Author(s): 江藤淳二、匂坂充行、松永嵩、枝川文哉、磯部仁博、沖田泰良
  • Organizer: 日本原子力学会2012年春の大会
  • Place of Presentation: 福井
  • Year and Date: 2012-03-20
• [Presentation] 原子力発電プラント構造材を対象とした放射線照射下ミクロ組織編か検出のための非破壊検査技術 (2012)
  • Author(s): 沖田泰良、磯部仁博、匂坂充行、江藤淳二
  • Organizer: 応用物理学会
  • Place of Presentation: 東京
  • Year and Date: 2012-03-15
• [Presentation] A study to evaluate the interaction between a line dislocation and glissile loops in BCC Fe (2012)
  • Author(s): T. Okita, M. Itakura, S. Fujita, S. Miyashiro
  • Organizer: 10th World Congress on Computational Mechanics
  • Place of Presentation: Sao Paulo, Brazil
• [Presentation] Development an EAM potential for Fe-Cr-Ni alloys (2012)
  • Author(s): M. Itakura, S. Miyashiro, T. Okita, M. Yamaguchi
  • Organizer: 10th World Congress on Computational Mechanics
  • Place of Presentation: Sao Paulo, Brazil
• [Presentation] 米国高速炉廃材を用いた照射下ミクロ組織の非破壊検査技術開発 –（１）実験的検討 (2012)
  • Author(s): 匂坂充行，江藤淳二，松永 嵩，枝川文哉，磯部仁博、沖田泰良
  • Organizer: 日本保全学会第九回学術講演会
  • Place of Presentation: 東京
• [Presentation] 米国高速炉廃材を用いた照射下ミクロ組織の非破壊検査技術開発 –（２）理論的検討 (2012)
  • Author(s): 江藤淳二，匂坂充行，松永 嵩，枝川文哉，磯部仁博、沖田泰良
  • Organizer: 日本保全学会第九回学術講演会
  • Place of Presentation: 東京
• [Presentation] Development of prediction model of ultrasonic wave changes due to irradiation-induced material degradations (2012)
  • Author(s): T. Okita, T. Sano, M. Sagisaka, J. Etoh, Y. Isobe
  • Organizer: 20th International Conference on Nuclear Engineering Collocated with ASME 2012 Power Conference
  • Place of Presentation: Anaheim, CA, USA
• [Presentation] Molecular dynamics simulations to evaluate the effect of applied strain on interstitial formation and orientation under collision cascade damage (2012)
  • Author(s): S. Miyashiro, S. Fujita, M. Itakura, T. Okita
  • Organizer: 20th International Conference on Nuclear Engineering Collocated with ASME 2012 Power Conference
  • Place of Presentation: Anaheim, CA, USA
• [Presentation] Molecular dynamics simulations to evaluate the effect of the difference in material properties on irradiation-induced defect formation under applied strain (2012)
  • Author(s): T. Horinouchi, S. Miyashiro, M. Itakura, T. Okita
  • Organizer: 20th International Conference on Nuclear Engineering Collocated with ASME 2012 Power Conference
  • Place of Presentation: Anaheim, CA, USA
• [Presentation] Direct observation of irradiation-induced defect formation on a Si(111) surface by a linked facility between an ion accelerator and STM (2012)
  • Author(s): M. Sato, T. Kikuchi, K. Murakami, S. Miyashiro, T. Okita
  • Organizer: 20th International Conference on Nuclear Engineering Collocated with ASME 2012 Power Conference
  • Place of Presentation: Anaheim, CA, USA
• [Presentation] 動力学解析を用いたカスケード損傷過程による欠陥形成挙動に及ぼす応力影響の解明(2) (2012)
  • Author(s): 宮代聡，藤田智，板倉充洋，沖田泰良
  • Organizer: 日本金属学会2012年秋期大会
  • Place of Presentation: 松山
• [Presentation] 分子動力学法を用いたひずみ印加下照射欠陥形成に及ぼす積層欠陥エネルギーの影響に関する研究 (2012)
  • Author(s): 堀之内利浩，宮代 聡，板倉充洋，沖田泰良
  • Organizer: 日本金属学会2012年秋期大会
  • Place of Presentation: 松山
• [Presentation] EBR-II廃材を用いたオーステナイト鋼の照射劣化非破壊診断・予測手法の開発 –（１）照射劣化診断手法の概要 (2012)
  • Author(s): 匂坂充行，江藤淳二，松永 嵩，枝川文哉，磯部仁博、沖田泰良
  • Organizer: 日本原子力学会2012年秋の大会
  • Place of Presentation: 広島
• [Presentation] EBR-II廃材を用いたオーステナイト鋼の照射劣化非破壊診断・予測手法の開発 –（２）スクリーニング検査手法の開発 (2012)
  • Author(s): 松永 嵩，江藤淳二，枝川文哉，匂坂充行，磯部仁博、沖田泰良
  • Organizer: 日本原子力学会2012年秋の大会
  • Place of Presentation: 広島
• [Presentation] EBR-II廃材を用いたオーステナイト鋼の照射劣化非破壊診断・予測手法の開発 –（３）詳細検査手法の開発 (2012)
  • Author(s): 江藤淳二，松永 嵩，枝川文哉，匂坂充行，磯部仁博、沖田泰良
  • Organizer: 日本原子力学会2012年秋の大会
  • Place of Presentation: 広島
• [Presentation] EBR-II廃材を用いたオーステナイト鋼の照射劣化非壊診断・予測手法の開発 –（４）非破壊検査信号からのボイド組織定量化に関する検討 (2012)
  • Author(s): 細川 哲，佐野貴士，沖田泰良
  • Organizer: 日本原子力学会2012年秋の大会
  • Place of Presentation: 広島
• [Presentation] EBR-II廃材を用いたオーステナイト鋼の照射劣化非破壊診断・予測手法の開発 –（５）低積層欠陥エネルギー金属の照射硬化予測モデルに関する検討 (2012)
  • Author(s): 浅利圭亮，Oeyvind S. Hetland, 堀之内利浩，宮代 聡，沖田泰良
  • Organizer: 日本原子力学会2012年秋の大会
  • Place of Presentation: 広島
• [Presentation] イオン加速器連結型STNによる表面はじき出し損傷の原子レベルでの観察 (2012)
  • Author(s): 佐藤元洋，菊池大朗，村上健太，宮代 聡，沖田泰良
  • Organizer: 日本原子力学会2012年秋の大会
  • Place of Presentation: 広島
• [Presentation] 非破壊検査とデータ解析に基づいた原子炉構造材料の照射劣化予測手法に関する研究 (2012)
  • Author(s): 細川 哲，佐野貴士，宮代 聡，沖田泰良
  • Organizer: 日本原子力学会2012年秋の大会 学生ポスターセッション
  • Place of Presentation: 広島
• [Presentation] FCC金属における応力負荷下転位－照射欠陥の相互作用に及ぼす転位性状の影響 (2012)
  • Author(s): 浅利圭亮，Oeyvind S. Hetland, 堀之内利浩，宮代 聡，沖田泰良
  • Organizer: 日本原子力学会2012年秋の大会 学生ポスターセッション
  • Place of Presentation: 広島
• [Presentation] はじき出し損傷分子シミュレーションの妥当性検証を目的とした金属表面原子の走査型トンネル顕微鏡観察 (2012)
  • Author(s): 佐藤元洋，菊池大朗，村上健太，宮代 聡，沖田泰良
  • Organizer: 日本原子力学会2012年秋の大会 学生ポスターセッション
  • Place of Presentation: 広島
• [Presentation] A non-destructive evaluation to measure irradiation-induced microstructure and resultant mechanical property changes by use of ultrasonic techniques (2012)
  • Author(s): T. Okita, J. Etoh, T. Matsunaga, M. Sagisaka, Y. Isobe, F.A. Garner
  • Organizer: NuMat 2012
  • Place of Presentation: Osaka, Japan
  • Invited
• [Presentation] Molecular dynamics simulatios to estimate influence of external stress on interstitial cluster orientation in FCC metal (2012)
  • Author(s): S. Miyashiro, S. Fujita, T. Okita
  • Organizer: NuMat 2012
  • Place of Presentation: Osaka, Japan
• [Presentation] A research to clarify effects of Stacking Fault Energy on irradiation hardening caused by voids in FCC metals (2012)
  • Author(s): K. Asari, S. Miyashiro, T. Horinouchi, T. Okita
  • Organizer: NuMat 2012
  • Place of Presentation: Osaka, Japan
• [Presentation] Integration of database, inspection techniques and modeling to detect irradiation hardening in austenitic stainless steels (2012)
  • Author(s): S. Hosokawa, T. Sano, S. Miyashiro, T. Okita
  • Organizer: NuMat 2012
  • Place of Presentation: Osaka, Japan
• [Presentation] Molecular dynamics simulations to evaluate effects of SFE on defect production and formation under applied strain in FCC metals (2012)
  • Author(s): T. Horinouchi, S. Miyashiro, M. Itakura, T. Okita
  • Organizer: NuMat 2012
  • Place of Presentation: Osaka, Japan
• [Presentation] Development of a non-destructive inspection method for irradiation-induced microstructural evolution of thick 304 stainless blocks (1) Experimental approach (2012)
  • Author(s): M. Sagisaka, J.Etoh, T. Matsunaga, Y Isobe, F.A. Garner, P.D. Freyer, T. Okita
  • Organizer: NuMat 2012
  • Place of Presentation: Osaka, Japan
• [Presentation] Development of a non-destructive inspection method for irradiation-induced microstructural evolution of thick 304 stainless blocks (2) Theoretical approach and numerical simulation (2012)
  • Author(s): J. Etoh, M. Sagisaka, T. Matsunaga, Y. Isobe, T. Okita
  • Organizer: NuMat 2012
  • Place of Presentation: Osaka, Japan
• [Presentation] Interactions between void swelling and irradiation creep in thick 304 stainless steel hexagonal reflector blocks in response to spatial gradients in neutron flux-spetra and irradiation temperature (2012)
  • Author(s): F.A. Garner. P.D. Freyer, D.L. Porter C. Knight, T. Okita, M. Sagisaka, Y. Isobe, J. Etoh, T. Mtsunaga, Y. Huang, J. Wiezorek
  • Organizer: NuMat 2012
  • Place of Presentation: Osaka, Japan
• [Presentation] 超音波を用いた照射下ミクロ組織の深さ分布定量技術の開発 (2011)
  • Author(s): 匂坂充行、江藤淳二、礒部仁博、宮代聡、沖田泰良
  • Organizer: 日本原子力学会2011年秋の大会
  • Place of Presentation: 北九州
  • Year and Date: 2011-09-20
• [Presentation] Development of a non-destructive evaluation method detecting irradiation-induced microstructural change (2011)
  • Author(s): T.Okita, S.Miyashiro, Y.Isobe, M.Saeisaka, J.Etoh
  • Organizer: The 5^<th> Annual Asia-Pacific Nuclear Energy Forum on Materials for Nuclear Application
  • Place of Presentation: Berkeley, CA, USA
  • Year and Date: 2011-06-21
• [Presentation] Molecular dynamics simulations to evaluate the influence of applied normal stress on defect cluster formation and behavior (2011)
  • Author(s): S.Miyashiro, S.Fujita, T.Okita
  • Organizer: The 5^<th> Annual Asia-Pacific Nuclear Energy Forum on Materials for Nuclear Application
  • Place of Presentation: Berkeley, CA, USA
  • Year and Date: 2011-06-21
• [Presentation] STM observations of Si (111) 7x7 reconstructed surfaces after Arirradiation (2010)
  • Author(s): T. Okita, K. Murakami, S. Miyashiro, M.Suzumura, K. Nishikawa
  • Organizer: Material Workshop at Tsinghua Week at Todai
  • Place of Presentation: Tokyo,Japan
• [Presentation] Recent Activities of the University of Tokyo (2010)
  • Author(s): T. Okita
  • Organizer: Invited presentation at Westinghouse Electric Power Company
  • Place of Presentation: Pittsburgh,USA
• [Presentation] EBR-II廃材を用いた高速炉材料照射劣化・評価に関する研究開発 (2010)
  • Author(s): 沖田泰良
  • Organizer: 2010年度日本原子力学会材料部会夏期セミナー
  • Place of Presentation: 常陸太子
• [Presentation] Atomistic observation of the displacement damage on surfaces by a linked facility with an ion accelerator and Scanning Tunnel Microscope (2010)
  • Author(s): T. Okita, K. Murakami, S. Miyashiro, M. Suzumura, K. Nishikawa
  • Organizer: Nuclear Materials 2010
  • Place of Presentation: Karlsruhe, Germany
• [Presentation] Molecular dynamics simulations to evaluate the interactions between a dislocation and vacancy-type or interstitial-type loop (2010)
  • Author(s): J. Maeda, M. Ota, T. Okita
  • Organizer: Poster session of Nuclear Materials2010
  • Place of Presentation: Karlsruhe, Germany
• [Presentation] Effects of external stress on irradiation behavior in FCC materials by integrating data analysis and atomistic simulations (2010)
  • Author(s): S. Miyashiro, S. Fujita, T. Okita,
  • Organizer: Poster session of Nuclear Materials 2010
  • Place of Presentation: Karlsruhe, Germany
• [Book] 「シミュレーション」-原子炉のシミュレーション:放射線環境化における材料損傷シミュレーション (2011)
  • Author(s): 沖田泰良
  • Total Pages: 5
  • Publisher: 日本シミュレーション学会誌