Approach based on atomic processes to study tungsten impurity behavior in plasma

2013 Fiscal Year Final Research Report

• Project/Area Number: 23246165
• Research Category: Grant-in-Aid for Scientific Research (A)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Nuclear fusion studies
• Research Institution: National Institute for Fusion Science
• Principal Investigator: MURAKAMI Izumi 核融合科学研究所, ヘリカル研究部, 教授 (30290919)
• Co-Investigator(Kenkyū-buntansha): KATO Daiji 核融合科学研究所, ヘリカル研究部, 准教授 (60370136) ; GOTO Motoshi 核融合科学研究所, ヘリカル研究部, 准教授 (00290916) ; SAKAUE Hiroyuki 核融合科学研究所, ヘリカル研究部, 助教 (40250112) ; SUZUKI Chihiro 核融合科学研究所, ヘリカル研究部, 助教 (30321615) ; NAKAMURA Nobuyuki 電気通信大学, レーザー新世代研究センター, 准教授 (50361837) ; TANUMA Hajime 首都大学東京, 理工学研究科, 教授 (30244411) ; SASAKI Akira 日本原子力研究開発機構, 量子ビーム応用部門, 研究副主幹 (10215709) ; KOIKE Fumihiro 上智大学, 理工学部, 客員教授 (90095505) ; NAKANO Tomohide 日本原子力研究開発機構, 核融合研究開発部門, 研究副主幹 (50354593)
• Co-Investigator(Renkei-kenkyūsha): SAKAI Yasuhiro 東邦大学, 理学部, 教授 (90235127) ; MOTOHASHI Kenji 東洋大学, 理工学部, 准教授 (50251583) ; WATANABE Tetsuya 国立天文台, ひのでプロジェクト, 教授 (60134631) ; YAMAMOTO Norimasa 中部大学, 藤原洋記念超電導・持続可能エネルギー研究センター, 研究員 (40350326) ; FUNABA Hisamichi 核融合科学研究所, ヘリカル研究部, 助教 (40300727)
• Project Period (FY): 2011-04-01 – 2014-03-31
• Keywords: 炉心プラズマ / 不純物挙動 / プラズマ・核融合 / 原子・分子物理 / 分光計測 / タングステン / プラズマ原子過程

Research Abstract

Tungsten is a candidate of plasma-facing material for ITER and future fusion reactors and we need to study tungsten behavior in plasmas by spectroscopy. We produced and validated basic atomic data of tungsten theoretically and experimentally, and constructed a tungsten spectroscopic model to reproduce tungsten spectra measured in LHD. We also measured momentum of excited tungsten atom sputtered from a tungsten target to examine ejecting processes of tungsten into plasma. These studies can extend to understand the tungsten behavior from production to transport in plasmas to find out a control method in plasmas.

Research Products

• [Journal Article] 研究最前線高温プラズマにおける高Z多価イオンの分光と原子構造に関する研究最前線 9.タングステンイオンのモデリング (2013)
  • Author(s): 村上泉
  • Journal Title: プラズマ・核融合学会誌 Volume: 89巻第5号 Pages: 314-317
• [Journal Article] EBIT spectroscopy of highly charged heavy ions relevant to hot plasmas (2013)
  • Author(s): N. Nakamura, X.-B. Ding, C.-Z. Dong, H. Hara, D. Kato, F. Koike, I. Murakami, T. Nakano, H. Ohashi, H.A. Sakaue, H. Watanabe, T. Watanabe and N. Yamamoto
  • Journal Title: AIP Conference Proceedings Volume: 1545 Pages: 64-71
  • DOI: 10.1063/1.4815841
  • Peer Reviewed
• [Journal Article] Algorithm-based modelling of fractional ion abundance and rates of ionization and recombination for tungsten plasmas (2013)
  • Author(s): A. Sasaki and I. Murakami
  • Journal Title: J. Phys. B* At. Mol. Opt. Phys. Volume: 46 Pages: 175701 (11pp)
  • DOI: 10.1088/0953-4075/46/17/175701
  • Peer Reviewed
• [Journal Article] Observation of visible forbidden lines from highly charged tungsten ions at the large helical device (2013)
  • Author(s): D Kato, M Goto, S Morita, I Murakami, H A Sakaue, X B Ding, S Sudo, C Suzuki, N Tamura, N Nakamura, H Watanabe and F Koike
  • Journal Title: Physica Scripta Volume: T156 Pages: 014081(3pp)
  • DOI: 10.1088/0031-8949/2013/T156/014081
  • Peer Reviewed
• [Journal Article] Mean velocity of 5d56p excited tungsten atoms sputtered by Kr+ ion bombardment (2012)
  • Author(s): K. Motohashi, K. Nogami, Y. Sakai, H. A. Sakaue, D. Kato, and T. Kenmotsu
  • Journal Title: Nuclear Instruments and Methods in Physics Research Volume: B Pages: 59-62
  • DOI: 10.1016/j.nimb.2012.04.016
  • Peer Reviewed
• [Journal Article] Spectroscopy of Highly Charged Tungsten Ions with Electron Beam Ion Traps (2012)
  • Author(s): H. A. Sakaue, D. Kato, X. B. Ding, I. Murakami, F. Koike, T. Nakano, H. Ohashi, J. Yatsurugi and N. Nakamura
  • Journal Title: AIP Conference Proceedings Volume: 1438 Pages: 91
  • DOI: 10.1063/1.4707861
  • Peer Reviewed
• [Journal Article] Collisional-Radiative Modeling of W27+ (2012)
  • Author(s): X.-B. Ding, I. Murakami, D. Kato, H. A. Sakaue, F. Koike and C.-Z. Dong
  • Journal Title: Plasma and Fusion Res. Volume: 7 Pages: 2403128
  • DOI: 10.1585/pfr.7.2403128
  • Peer Reviewed
• [Journal Article] Visible Transitions in Highly ChargedTungsten Ions : 365-475 nm (2012)
  • Author(s): A. Komatsu, J. Sakoda, M. Minoshima, H. Sakaue, X. Ding, D. Kato, I. Murakami, F. Koike, N. Nakamura
  • Journal Title: Plasma and Fusion Research Volume: 7 Pages: 1201158
  • DOI: 10.1585/pfr.7.1201158
  • Peer Reviewed
• [Journal Article] Ab initio multi-configuration Dirac.Fock calculation of M1 visible transitions among the ground state multiplets of the W26+ ion (2011)
  • Author(s): X.-B. Ding, F. Koike, I. Murakami, D. Kato, H. A Sakaue, C.-Z. Dong, N. Nakamura, A. Komatsu and J. Sakoda
  • Journal Title: Journal of Physics B : Atomic, Molecular and Optical. Physics Volume: 44 Pages: 145004 (6pp)
  • DOI: 10.1088/0953-4075/44/14/145004
  • Peer Reviewed
• [Journal Article] Interpretation of spectral emission in the 20 nm region from tungsten ions observed in fusion device plasmas (2011)
  • Author(s): C Suzuki, C S Harte, D Kilbane, T Kato, H A Sakaue, I Murakami, D Kato, K Sato, N Tamura, S Sudo, M Goto, R D'Arcy, E Sokell and G O'Sullivan
  • Journal Title: Journal of Physics B : Atomic, Molecular and Optical. Physics Volume: 44 Pages: 175004 (7pp)
  • DOI: 10.1088/0953-4075/44/17/175004
  • Peer Reviewed
• [Presentation] タングステン多価イオンの衝突輻射モデル構築と極端紫外スペクトル解析 (2014)
  • Author(s): 村上泉、加藤太治、坂上裕之、鈴木千尋、森田繁、後藤基志、佐々木明、山本則正、小池文博、LHD実験グループ
  • Organizer: 日本物理学会第69回年次大会
  • Place of Presentation: 東海大学(平塚市)
  • Year and Date: 20140327-30
• [Presentation] LHDでのタングステン多価イオンM1遷移の観測と電離/再結合係数データ評価 II (2014)
  • Author(s): 加藤太治、坂上裕之、後藤基志、森田繁、村上泉、鈴木千尋、田村直樹、須藤滋、中村信行、小池文博、X. Ding, 佐々木明
  • Organizer: 日本物理学会第69回年会
  • Place of Presentation: 東海大学(平塚市)
  • Year and Date: 20140327-30
• [Presentation] イオンビーム照射によりタングステン表面から後方散乱する励起原子の発光分光 (2013)
  • Author(s): 酒井康弘、加藤太治、剣持貴弘、坂上裕之、古屋謙治、本橋健次
  • Organizer: 日本物理学会2013年秋季大会
  • Place of Presentation: 徳島大学(徳島)
  • Year and Date: 20130925-28
• [Presentation] Observations of EUV spectra from tungsten and lanthanide ions in LHD (2013)
  • Author(s): C. Suzuki, F. Koike, I. Murakami, N. Tamura, S. Sudo, H. A. Sakaue, N. Nakamura, S. Morita, M. Goto, D. Kato, T. Nakano, T. Higashiguchi, C. S. Harte, G. O'Sullivan
  • Organizer: 11th International Colloquium on Atomic Spectra and Oscillator Strengths for Astrophysical and Laboratory Plasmas
  • Place of Presentation: Mons, Bergium
  • Year and Date: 20130805-09
  • Invited
• [Presentation] Validation of Fe and W ion spectroscopic models for solar and fusion plasmas and atomic and molecular database at NIFS (2013)
  • Author(s): I. Murakami, C. Dong. H. Hara, D. Kato, M. Kato, F. Koike, S. Morita, N. Nakamura, A. Sasaki, H. A. Sakaue, S. Sudo, C. Suzuki, N. Tamura, T. Watanabe, N. Yamamoto
  • Organizer: Japan-Australia Commemorative Workshop
  • Place of Presentation: Cambera, Australia
  • Year and Date: 20130623-25
  • Invited
• [Presentation] EBIT spectroscopy of highly charged heavy ions relevant to hot plasma (2012)
  • Author(s): N. Nakamura et al.
  • Organizer: 8th International Conference on Atomic and Molecular Data and Their Applications (ICAMDATA2012)
  • Place of Presentation: Gaithersburg, USA
  • Year and Date: 20120930-1004
  • Invited
• [Presentation] Analysis of spectra from multiply ionized W ions by atomic structure code FAC (2012)
  • Author(s): 仲野友英、村上泉、鈴木千尋
  • Organizer: プラズマ・核融合学会第29回年会
  • Year and Date: 2012-11-30
• [Presentation] タングステンイオンのモデリング (2012)
  • Author(s): 村上泉
  • Organizer: 日本物理学会第67回年次大会
  • Place of Presentation: 関西学院大学
  • Year and Date: 2012-03-25
• [Presentation] タングステン表面でのスパッタ原子の発光分光 (2011)
  • Author(s): 本橋健次、加藤太治、剣持貴弘、酒井康弘、坂上裕之、野上慶祐、古屋謙治
  • Organizer: 応用物理学会
  • Place of Presentation: 山形大学
  • Year and Date: 20110829-0902
• [Presentation] Spectroscopy of Highly Charged Tungsten Ions with Electron Beam Ion Traps (2011)
  • Author(s): H. A. Sakaue et al.
  • Organizer: The 17th International Conference on Atomic Processes in Plasmas
  • Place of Presentation: Queen's University Belfast
  • Year and Date: 20110719-22
  • Invited