Experimental investigation of vapor shielding effects on plasma-facing materials using the double plasma gun device

• Project/Area Number: 23760809
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Nuclear fusion studies
• Research Institution: University of Hyogo
• Principal Investigator: KIKUCHI Yusuke 兵庫県立大学, 工学(系)研究科(研究院), 准教授 (00433326)
• Project Period (FY): 2011 – 2013
• Project Status: Completed (Fiscal Year 2013)
• Budget Amount: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000); Fiscal Year 2013: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000); Fiscal Year 2012: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2011: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
• Keywords: 磁化プラズマガン / ELM / プラズマ対向壁 / 蒸気遮蔽効果 / パルス熱負荷 / プラズマガン / ダイバータ / タングステン / 蒸気遮蔽

Research Abstract

We have studied simulation experiments of ELM-like pulsed plasma loads using a magnetized coaxial plasma gun (MCPG) at Univ. of Hyogo. The performance of the MCPG device has been improved to simulate transient heat and particle loads such as edge localized modes (ELMs). Surface modifications of tungsten (W) materials for plasma-facing components in fusion reactors due to repetitive pulsed plasma irradiation have been investigated. In particular, effects of pre-plasma exposure on W cracking due to ELM-like pulsed plasma bombardment have been evaluated for the first time. It has been found that He-induced W Fuzz exhibited a better resistance to surface cracking. On the other hand, a unique experiment using two MCPG devices of so-called double plasma gun to understand vapor shielding effects on the material erosion has been constructed. The first experiment to clarify vapor shielding effects quantitatively has been started.

Research Products

• [Journal Article] Characterization of Gun Plasma Penetrated into a Steady State Plasma Device (2013)
  • Author(s): S. Kajita, T. Akiyama, T. Nihashi, M. Osaka, N. Ohno, Y. Kikuchi, I. Sakuma, M. Nagata
  • Journal Title: IEEE Transactions on Plasma Science Volume: Vol. 41 Pages: 3122-3128
  • Peer Reviewed
• [Journal Article] Surface cracking and melting of different tungsten grades under transient heat and particle loads in a magnetized coaxial plasma gun (2013)
  • Author(s): Y. Kikuchi, I. Sakuma, D. Iwamoto, Y. Kitagawa, N. Fukumoto, M. Nagata, Y. Ueda
  • Journal Title: Journal of Nuclear Materials Volume: Vol. 438
  • Peer Reviewed
• [Journal Article] Development of Steady/Transient Dual Plasma Irradiation Device Using a Plasma Gun (2013)
  • Author(s): S. Kajita, N. Ohno, T. Akiyama, T. Nihashi, T. Uchiyama, M. Osaka, Y. Kikuchi and M. Nagata
  • Journal Title: Journal of Nuclear Materials Volume: Vol. 438
  • Peer Reviewed
• [Journal Article] Response of fuzzy tungsten surfaces to pulsed plasma bombardment (2013)
  • Author(s): D. Nishijima, R. P. Doerner, D. Iwamoto, Y. Kikuchi, M. Miyamoto, M. Nagata, I. Sakuma, K. Shoda and Y. Ueda
  • Journal Title: Journal of Nuclear Materials Volume: Vol. 434 Pages: 230-234
  • Peer Reviewed
• [Journal Article] Observation of Direct Ion Heating in Double-Pulsing CHI in Helicity Injected Spherical Torus Plasmas (2013)
  • Author(s): T. Hanao, H. Hirono, T. Hyobu, K. Ito, K. Matsumoto, T. Nakayama, Y. Kikuchi, N. Fukumoto, M. Nagata
  • Journal Title: Plasma and Fusion Research Volume: 8 Issue: 0 Pages: 1202104-1202104
  • DOI: 10.1585/pfr.8.1202104
  • NAID: 130004467859
  • ISSN: 1880-6821
  • Peer Reviewed
• [Journal Article] Influences of ELM-like Pulsed Plasma Bombardment on Deuterium Retention in Tungsten (2011)
  • Author(s): D. Nishijima, Y. Kikuchi, M. Nakatsuka, M.J. Baldwin, R.P. Doerner, M. Nagata, Y. Ueda
  • Journal Title: Physica Scripta Volume: Vol. T145
  • Peer Reviewed
• [Journal Article] Surface damage characteristics of CFC and tungsten with repetitive ELM-like pulsed plasma irradiation (2011)
  • Author(s): Y. Kikuchi, D. Nishijima, M. Nakatsuka, K. Ando, T. Higashi, Y. Ueno, M. Ishihara, K. Shoda, M. Nagata, T. Kawai, Y. Ueda, N. Fukumoto, R.P. Doerner
  • Journal Title: Journal of Nuclear Materials Volume: Vol. 415
  • Peer Reviewed
• [Journal Article] Effects of Pre-Plasma Exposure on Tungsten Surface Cracking Due to ELM-like Pulsed Plasma Bombardment (2011)
  • Author(s): D. Nishijima, Y. Kikuchi, M. Nakatsuka, R.P. Doerner, M. Nagata, Y. Ueda
  • Journal Title: Fusion Science and Technology Volume: Vol. 60 Pages: 1447-1450
  • Peer Reviewed
• [Presentation] Experimental investigation of vapor shielding effects induced by ELM-like pulsed plasma loads using the double plasma gun device (2014)
  • Author(s): I. Sakuma, Y. Kikuchi, Y. Kitagawa, Y. Asai, K. Onishi, N. Fukumoto, M. Nagata
  • Organizer: 21st International Conference on Plasma Surface Interactions in Controlled Fusion Devices
  • Place of Presentation: Kanazawa, Japan
• [Presentation] Surface modifications on toughened, fine-grained, recrystallized tungsten with repetitive ELM-like pulsed plasma irradiation (2014)
  • Author(s): Y. Kikuchi, I. Sakuma, Y. Kitagawa, Y. Asai, K. Onishi, N. Fukumoto, M. Nagata, Y. Ueda, H. Kurishita
  • Organizer: 21st International Conference on Plasma Surface Interactions in Controlled Fusion Devices
  • Place of Presentation: Kanazawa, Japan
• [Presentation] Measurement of Transient Heat and Particle loads in NAGDIS-PG (2014)
  • Author(s): D. Sato, N. Ohno, M. Osaka, S. Kajitaa, Y. Kikuchi
  • Organizer: 21st International Conference on Plasma Surface Interactions in Controlled Fusion Devices
  • Place of Presentation: Kanazawa, Japan
• [Presentation] Recent results of ELM simulation experiments on a magnetized coaxial plasma gun (2014)
  • Author(s): Y. Kikuchi, I. Sakuma, Y. Kitagawa,Y. Asai, K. Onishi, N. Fukumoto, M. Nagata, Y. Ueda
  • Organizer: Japan-US Workshop on "Heat Removal and Plasma Material Interactions for Fusion"
  • Place of Presentation: Livermore, USA
• [Presentation] Recent results of ELM simulation experiments on a magnetized coaxial plasma gun (2014)
  • Author(s): Y. Kikuchi, I. Sakuma, Y. Kitagawa,Y. Asai, K. Onishi, N. Fukumoto, M. Nagata, Y. Ueda
  • Organizer: Japan-US Workshop on "Heat Removal and Plasma Material Interactions for Fusion"
  • Place of Presentation: リバモア（米国）
• [Presentation] Surface modifications on toughened, fine-grained, recrystallized tungsten (2014)
  • Author(s): Y. Kikuchi, I. Sakuma, Y. Kitagawa, Y. Asai, K. Onishi, N. Fukumoto, M. Nagata, Y. Ueda, H. Kurishita
  • Organizer: 21st International Conference on Plasma Surface Interactions in Controlled Fusion Devices
  • Place of Presentation: 石川県立音楽堂
• [Presentation] Experimental investigation of vapor shielding effects induced by ELM-like pulsed plasma loads using the double plasma gun device (2014)
  • Author(s): I. Sakuma, Y. Kikuchi, Y. Kitagawa, Y. Asai, K. Onishi, N. Fukumoto, M. Nagata
  • Organizer: 21st International Conference on Plasma Surface Interactions in Controlled Fusion Devices
  • Place of Presentation: 石川県立音楽堂
• [Presentation] Measurement of Transient Heat and Particle loads in NAGDIS-PG (2014)
  • Author(s): D. Sato, N. Ohno, M. Osaka, S. Kajita, Y. Kikuchi
  • Organizer: 21st International Conference on Plasma Surface Interactions in Controlled Fusion Devices
  • Place of Presentation: 石川県立音楽堂
• [Presentation] Characterization of CT injector developed for simulation of ELM-like pulse heat loads on divertor materials (2013)
  • Author(s): I. Sakuma, Y. Kitagawa, Y. Asai, K. Onishi, Y. Kikuchi, N. Fukumoto and T. Kanki
  • Organizer: US-Japan Workshop on "Advanced Control and Confinement Improvement of Innovative Compact Toroidal Configurations"
  • Place of Presentation: Kobe, Japan
• [Presentation] 磁化プラズマガンを用いたELM様パルスプラズマ照射実験の進展 (2013)
  • Author(s): 菊池祐介、佐久間一行、北川賢伸、浅井康博、大西晃司、福本直之、永田正義
  • Organizer: 筑波大学プラズマ研究センターシンポジウム
  • Place of Presentation: つくばサイエンスインフォメーションセンタ－
• [Presentation] 定常プラズマ･熱パルス複合照射環境下でのプラズマ･壁相互作用 (2013)
  • Author(s): 大野哲靖、梶田 信、菊池祐介、永田正義
  • Organizer: 日本物理学会2013年秋季大会
  • Place of Presentation: 徳島大学
• [Presentation] タングステンモノブロックの表面損傷が熱負荷応答に与える影響 (2013)
  • Author(s): 田中泰史，上田良夫，LEE Heun Tae，永田正義，菊池祐介，鈴木 哲，関洋 治
  • Organizer: プラズマ・核融合学会第30回年会
  • Place of Presentation: 東京工業大学
• [Presentation] 磁化プラズマガンにおけるカロリーメータを用いたCT プラズマの熱流計測 (2013)
  • Author(s): 大西晃司，佐久間一行，北川賢伸，浅井康博，菊池祐介，福本直之，永田正義
  • Organizer: プラズマ・核融合学会第30回年会
  • Place of Presentation: 東京工業大学
• [Presentation] 磁化プラズマガンにおけるイオンドップラー分光器を用いた CTプラズマのイオン温度・フロー計測 (2013)
  • Author(s): 北川賢伸，佐久間一行，浅井康博，大西晃司，菊池祐介，福本直之，永田正義
  • Organizer: プラズマ・核融合学会第30回年会
  • Place of Presentation: 東京工業大学
• [Presentation] ELM パルス熱負荷時の蒸気遮蔽効果の解明に向けたダブルプラズマガン装置の初期実験 (2013)
  • Author(s): 佐久間一行，北川賢伸，浅井康博，大西晃司，菊池祐介，福本直之，永田正義
  • Organizer: プラズマ・核融合学会第30回年会
  • Place of Presentation: 東京工業大学
• [Presentation] ELM 様パルスプラズマ照射による微結晶粒タングステンの表面損傷 (2013)
  • Author(s): 菊池祐介，佐久間一行，北川賢伸，浅井康博，大西晃司，福本直之，永田正義，上田良夫，栗下裕明
  • Organizer: プラズマ・核融合学会第30回年会
  • Place of Presentation: 東京工業大学
• [Presentation] Characterization of CT injector developed for simulation of ELM-like pulse heat loads on divertor materials (2013)
  • Author(s): I. Sakuma, Y. Kitagawa, Y. Asai, K. Onishi, Y. Kikuchi, N. Fukumoto and M. Nagata
  • Organizer: US-Japan Workshop on "Advanced Control and Confinement Improvement of Innovative Compact Toroidal Configurations"
  • Place of Presentation: 神戸国際会議場
• [Presentation] Simulation Experiments of ELM-like Transient Heat and Particle Loads using a Magnetized Coaxial Plasma Gun (2012)
  • Author(s): Y. Kikuchi, I. Sakuma, D. Iwamoto, Y. Kitagawa, K. Shoda, N. Fukumoto, M. Nagata, Y. Ueda, S. Suzuki
  • Organizer: Abs. of 24th IAEA Fusion Energy Conference (FEC)
  • Place of Presentation: San Diego, USA
• [Presentation] Development of Steady/Transient Dual Plasma Irradiation Device Using a Plasma Gun (2012)
  • Author(s): S. Kajita, N. Ohno, T. Akiyama, T. Uchiyama, T. Nihashi, M. Osaka, Y. Kikuchi, M. Nagata
  • Organizer: 20th International Conference on Plasma Surface Interactions in Controlled Fusion Devices
  • Place of Presentation: アーヘン（ドイツ）
• [Presentation] Erosion of plasma-facing materials due to repetitive ELM-like pulsed plasma bombardment (2012)
  • Author(s): Y. Kikuchi, K. Shoda, D. Iwamoto, I. Sakuma, Y. Kitagawa, N. Fukumoto, M. Nagata, Y. Ueda
  • Organizer: 20th International Conference on Plasma Surface Interactions in Controlled Fusion Devices
  • Place of Presentation: アーヘン（ドイツ）
• [Presentation] Development of divertor simulator enabling simultaneous irradiation of steady-state high heat flux plasma and plasmoid (2012)
  • Author(s): T. Nihashi, N. Ohno, S. Kajita, M. Osaka, M. Takagi, Y. Kikuchi, M. Nagata, and T. Akiyama
  • Organizer: Joint Conference of the International Conference on Open Magnetic Systems for Plasma Confinement (OS) and the International Workshop on Plasma Material Interaction Facilities for Fusion (PMIF)
  • Place of Presentation: つくば国際会議場（茨城県）
• [Presentation] Simulation Experiments of ELM-like Transient Heat and Particle Loads using a Magnetized Coaxial Plasma Gun (2012)
  • Author(s): Y. Kikuchi, I. Sakuma, D. Iwamoto, Y. Kitagawa, K. Shoda, N. Fukumoto, M. Nagata, Y. Ueda, S. Suzuki
  • Organizer: 24th IAEA Fusion Energy Conference (FEC)
  • Place of Presentation: サンディエゴ（米国）
• [Presentation] Combined heat load testing of W monoblocks for ITER (2012)
  • Author(s): Y. Ueda, T. Kawai, Y. Ohtsuka, I. Sakuma, Y. Kikuchi, M. Nagata, K. Ezato, Y. Seki, and S. Suzuki
  • Organizer: 27th Symposium of Fusion Technology
  • Place of Presentation: リエージュ（ベルギー）
• [Presentation] Development of a double plasma gun device for investigation of effects of vapor shielding on erosion of PFC materials under ELM-like pulsed plasma bombardment (2012)
  • Author(s): I. Sakuma, D. Iwamoto, Y. Kitagawa, Y. Kikuchi, N. Fukumoto, M. Nagata
  • Organizer: 54th Annual Meeting of the Division of Plasma Physics
  • Place of Presentation: プロビデンス（米国）
• [Presentation] Measurements of line-averaged electron density of pulsed plasmas using a He-Ne laser interferometer in a magnetized coaxial plasma gun device (2012)
  • Author(s): D. Iwamoto, I. Sakuma, Y. Kitagawa, Y. Kikuchi, N. Fukumoto, M. Nagata
  • Organizer: 54th Annual Meeting of the Division of Plasma Physics
  • Place of Presentation: プロビデンス（米国）
• [Presentation] Measurements of ion temperature and flow of pulsed plasmas produced by a magnetized coaxial plasma gun device using an ion Doppler spectrometer (2012)
  • Author(s): Y. Kitagawa, I. Sakuma, D. Iwamoto, Y. Kikuchi, N. Fukumoto, M. Nagata
  • Organizer: 54th Annual Meeting of the Division of Plasma Physics
  • Place of Presentation: プロビデンス（米国）
• [Presentation] パルスプラズマガン装置開発と実験の現状 (2011)
  • Author(s): 菊池祐介、永田正義
  • Organizer: 筑波大学プラズマ研究センターシンポジウム
  • Place of Presentation: つくばサイエンスインフォメーションセンター（茨城県）
• [Presentation] ELM様パルス熱・粒子模擬のためのプラズマガン開発と照射実験 (2011)
  • Author(s): 菊池祐介
  • Organizer: PWI合同研究会
  • Place of Presentation: 核融合科学研究所（岐阜県）
• [Presentation] Influences of ELM-like Pulsed Plasma Bombardment on Deuterium Retention in Tungsten (2011)
  • Author(s): D. Nishijima, Y. Kikuchi, M. Nakatsuka, M.J. Baldwin, R.P. Doerner, M. Nagata, and Y. Ueda
  • Organizer: 13th International Workshop on Plasma-Facing Materials and Components for Fusion Applications
  • Place of Presentation: ローゼンハイム（ドイツ）
• [Presentation] Development of a Magnetized Coaxial Plasma Gun for Simulation Experiment of Type-I Elm Heat Loads (2011)
  • Author(s): I. Sakuma, K. Shoda, D. Iwamoto, Y. Kikuchi, N. Fukumoto, M. Nagata
  • Organizer: 24th IEEE Symposium on Fusion Engineering
  • Place of Presentation: シカゴ（アメリカ）
• [Presentation] Initial results of ELM simulation experiments on the upgraded magnetized coaxial plasma gun device (2011)
  • Author(s): Y. Kikuchi, K. Shoda, D. Iwamoto, I. Sakuma, N. Fukumoto, M. Nagata
  • Organizer: 2011 Japan-US Workshop on Heat Removal and Plasma Materials Interactions for Fusion, and IEA Workshop on Solid Surface Plasma Facing Components
  • Place of Presentation: コープイン京都（京都府）
• [Presentation] Development of a magnetized plasma gun device for ELM-like pulsed plasma irradiation (2011)
  • Author(s): K. Shoda, I. Sakuma, D. Iwamoto, Y. Kikuchi, N. Fukumoto, M. Nagata
  • Organizer: Plasma Conference 2011
  • Place of Presentation: 石川県立音楽堂（石川県）
• [Presentation] Characteristics of pulsed plasmas in the magnetized plasma gun device (2011)
  • Author(s): D. Iwamoto, K. Shoda, I. Sakuma, Y. Kikuchi, N. Fukumoto, M. Nagata
  • Organizer: Plasma Conference 2011
  • Place of Presentation: 石川県立音楽堂（石川県）
• [Presentation] Changes of fuzzy W surface structures due to pulsed plasma bombardment using a magnetized plasma gun device (2011)
  • Author(s): I. Sakuma, K. Shoda, D. Iwamoto, Y. Kikuchi, D. Nishijima, R. Doerner, N. Fukumoto, M. Nagata, Y. Ueda
  • Organizer: Plasma Conference 2011
  • Place of Presentation: 石川県立音楽堂（石川県）
• [Presentation] 磁化同軸プラズマガンを用いたELM様プラズマ照射による核融合炉材料表面損傷
  • Author(s): 佐久間一行、岩本大希、北川賢伸、菊池祐介、西島大輔、Russ Doerner、福本直之、永田正義、上田良夫
  • 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）
• [Presentation] 磁化同軸プラズマガンを用いたELM様パルスプラズマ生成装置開発とその特性評価
  • Author(s): 岩本大希、佐久間一行、北川賢伸、菊池祐介、福本直之、永田正義
  • 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）
• [Presentation] イオンドップラー分光システムを用いたCTパルスプラズマのイオン温度・フロー計測
  • Author(s): 北川賢伸、岩本大希、佐久間一行、菊池祐介、福本直之、永田正義
  • 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）
• [Presentation] プラズマガンを用いたELM様パルスプラズマのタングステン材への照射実験
  • Author(s): 菊池祐介、岩本 大希、佐久間 一行、北川 賢伸、福本 直之、永田 正義
  • Organizer: ダイバータおよびPWI合同研究会
  • Place of Presentation: 筑波大学（茨城県）
• [Presentation] ELM パルス熱負荷時の蒸気遮蔽効果の解明に向けたダブルプラズマガン装置の開発
  • Author(s): 佐久間一行，岩本大希，北川賢伸，菊池祐介，福本直之，永田正義
  • 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）
• [Presentation] レーザ干渉計および分光計測を用いたCT パルスプラズマの特性評価
  • Author(s): 岩本大希，佐久間一行，北川賢伸，菊池祐介，福本直之，永田正義
  • 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）
• [Presentation] 磁化プラズマガン装置を用いたタングステン材への ELM様パルスプラズマ照射実験
  • Author(s): 菊池祐介，佐久間一行，岩本大希，北川賢伸， 福本直之，永田正義，上田良夫
  • 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）
• [Remarks]
  • URL: http://www.eng.u-hyogo.ac.jp/eecs/ykikuchi/kikuchi.html