Investigation of negative ion extraction mechanism from a high-density ionic plasma

• Project/Area Number: 25249134
• 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: Takeiri Yasuhiko 核融合科学研究所, その他部局等, 所長 (60179603)
• Co-Investigator(Kenkyū-buntansha): TSUMORI Katsuyoshi 核融合科学研究所, ヘリカル研究部, 准教授 (50236949)
• Co-Investigator(Renkei-kenkyūsha): IKEDA Katsunori 核融合科学研究所, ヘリカル研究部, 助教 (20321614) ; NAKANO Haruhisa 核融合科学研究所, ヘリカル研究部, 助教 (90442524) ; KISAKI Masashi 核融合科学研究所, ヘリカル研究部, 助教 (70598945) ; NAGAOKA Kenichi 核融合科学研究所, ヘリカル研究部, 准教授 (20353443) ; OSAKABE Masaki 核融合科学研究所, ヘリカル研究部, 教授 (90280601) ; HATAYAMA Akiyoshi 慶応義塾大学, 理工学部, 教授 (10245607)
• Research Collaborator: TOKUZAWA Tokihiko 核融合科学研究所, ヘリカル研究部, 准教授 (90311208)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Project Status: Completed (Fiscal Year 2015)
• Budget Amount: ¥36,400,000 (Direct Cost: ¥28,000,000、Indirect Cost: ¥8,400,000); Fiscal Year 2015: ¥5,850,000 (Direct Cost: ¥4,500,000、Indirect Cost: ¥1,350,000); Fiscal Year 2014: ¥14,430,000 (Direct Cost: ¥11,100,000、Indirect Cost: ¥3,330,000); Fiscal Year 2013: ¥16,120,000 (Direct Cost: ¥12,400,000、Indirect Cost: ¥3,720,000)
• Keywords: 負イオン源 / 中性粒子ビーム入射 / プラズマ加熱 / イオン性プラズマ / 負イオンダイナミクス / 磁場閉じ込め核融合 / 負イオン / NBI / ペアイオンプラズマ / 中性粒子入射加熱装置 / イオン引き出し / 仕事関数

Outline of Final Research Achievements

The investigation of negative ion extraction mechanism in the negative ion source was performed, and it was found; 1) externally applied electric field can penetrate deeply inside the extraction region, 2) negative ions are transported from the plasma grid (PG) toward driver region, 3) negative ions are extracted through whole region in the extraction region, 4) electron density and negative ion density near the PG responds to the extraction voltage, and 3D magnetic field structure plays a role for particle dynamics. These observations contribute to reveal the negative ion dynamics for the first time.

Research Products

• [Int'l Joint Research] Consorzio RFX(Italy)
• [Int'l Joint Research] Max-Planck IPP(Germany)
• [Journal Article] Negative ion production and beam extraction processes in a large ion source (2016)
  • Author(s): K. Tsumori, K. Ikeda, H. Nakano, M. Kisaki, S. Geng, M. Wada, K. Sasaki, S. Nishiyama, M. Goto, G.Serianni, P. Agostinetti, E. Sartori, M. Brombin, P. Veltri, C. Wimmer, K. Nagaoka, M. Osakabe, Y. Takeiri, and O. Kaneko
  • Journal Title: Review of Scientific Instruments Volume: 87 Issue: 2
  • DOI: 10.1063/1.4938254
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Installation of Spectrally Selective Imaging System in RF Negative Ion Source (2016)
  • Author(s): K. Ikeda, D. Wunderlich, U. Fantz, B. Heinemann, M. Kisaki, K. Nagaoka, H. Nakano, M. Osakabe, K. Tsumori, O. Kaneko and Y. Takeiri
  • Journal Title: Review of Scientific Instruments Volume: 87 Issue: 2
  • DOI: 10.1063/1.4932987
  • NAID: 120007116699
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Improvement of accelerator of negative ion source on the Large Helical Device (2016)
  • Author(s): M. Kisaki, K. Ikeda, M. Osakabe, K. Tsumori, H. Nakano, S. Geng, K. Nagaoka, O. Kaneko, and Y. Takeiri
  • Journal Title: Review of Scientific Instruments Volume: 87 Issue: 2
  • DOI: 10.1063/1.4936249
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Charged particle flows in the beam extraction region of a negative ion source for NBI (2016)
  • Author(s): S. Geng, K. Tsumori, H. Nakano, M. Kisaki, K. Ikeda, M. Osakabe, K. Nagaoka, Y. Takeiri, M. Shibuya, and O. Kaneko
  • Journal Title: Review of Scientific Instruments Volume: 87 Issue: 2
  • DOI: 10.1063/1.4931796
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Balmer-α spectrum measurements of the LHD one-third ion source (2016)
  • Author(s): M. Wada, T. Kenmotsu, M. Kisaki, H. Nakano, M. Nishiura, and K. Tsumori
  • Journal Title: Review of Scientific Instruments Volume: 87 Issue: 2
  • DOI: 10.1063/1.4932319
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Optics of the NIFS negative ion source test stand by infrared calorimetry and numerical modelling (2016)
  • Author(s): P. Veltri, V. Antoni, P. Agostinetti, M. Brombin, K. Ikeda, M. Kisaki, H. Nakano, E. Sartori, G. Serianni, Y. Takeiri, and K. Tsumori
  • Journal Title: Review of Scientific Instruments Volume: 87 Issue: 2
  • DOI: 10.1063/1.4932982
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Cavity Ringdown Technique for negative-hydrogen-ion measurement in ion source for neutral beam injector (2016)
  • Author(s): H. Nakano, K. Tsumori, M. Shibuya, S. Geng, M. Kisaki, K. Ikeda, K. Nagaoka, M. Osakabe, Y, Takeiri and O. Kaneko
  • Journal Title: Journal of Instrumentation Volume: 11
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Research progress on ionic plasmas generated in an intense hydrogen negative ion source (2015)
  • Author(s): Y. Takeiri, K. Tsumori, K. Ikeda, H. Nakano, M. Kisaki, K. Nagaoka, T. Tokuzawa, S. Geng, M. Osakabe, O. Kaneko, T. Kondo, M. Sato, M. Shibuya, S. Komada and H. Sekiguchi,
  • Journal Title: AIP Conference Proceedings Volume: 1655 Pages: 060004-060004
  • DOI: 10.1063/1.4916473
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Evaluation of Negative Ion Distribution Changes by Image Processing Diagnostic (2015)
  • Author(s): K. Ikeda, H. Nakano, K. Tsumori, M. Kisaki, S. Geng, K. Nagaoka, Y. Takeiri, O. Kaneko
  • Journal Title: AIP Conference Proceedings Volume: 1655 Pages: 040005-040005
  • DOI: 10.1063/1.4916447
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Hydrogen Atom Temperature Measured with Wavelength-Modulated Laser Absorption Spectroscopy in Large Scale Filament Arc negative Hydrogen Ion Source (2015)
  • Author(s): H. Nakano, S. Nishiyama, M. Goto, K. Tsumori, M. Kisaki, K. Ikeda, K. Nag aoka, M. Osakabe, Y. Takeiri, O. Kaneko, K. Sasaki
  • Journal Title: AIP Conference Proceedings Volume: 1655 Pages: 020018-020018
  • DOI: 10.1063/1.4916427
  • Peer Reviewed / Open Access
• [Journal Article] Laser photodetachment diagnostics of a 1/3-size negative hydrogen ion source for NBI (2015)
  • Author(s): S. Geng, K. Tsumori, H. Nakano, M. Kisaki, K. Ikeda, Y. Takeiri, M. Osakabe, K. Nagaoka, and O. Kaneko
  • Journal Title: AIP Conference Proceedings Volume: 1655 Pages: 040014-040014
  • DOI: 10.1063/1.4916456
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] A Multi-beamlet analysis of the MITICA accelerator (2015)
  • Author(s): N. Fonnesu, P. Agostinetti, G. Serianni, M. Kisaki and P. Veltri
  • Journal Title: AIP conference proceedings Volume: 1655 Pages: 050008-050008
  • DOI: 10.1063/1.4916465
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Spatial Distributions of Charged Particles and Plasma Potential before and during Beam Extraction in a Negative Hydrogen Ion Source for NBI (2015)
  • Author(s): Shaofei GENG, Katsuyoshi TSUMORI, Haruhisa NAKANO, Masashi KISAKI, Yasuhiko TAKEIRI, Masaki OSAKABE, Katsunori IKEDA, Ken-ichi NAGAOKA, Osamu KANEKO, Masayuki SHIBUYA and NIFS NBI Group
  • Journal Title: Plasma and Fusion Research Volume: 10 Issue: 0 Pages: 3405016-3405016
  • DOI: 10.1585/pfr.10.3405016
  • NAID: 130005302874
  • ISSN: 1880-6821
  • Peer Reviewed
• [Journal Article] Design, installation, commissioning and operation of a beamlet monitor in the negative ion beam test stand at NIFS (2015)
  • Author(s): V. Antoni, P. Agostinetti, M. Brombin, V. Cervaro, R. Delogu, M. De. Muri, D. Fasolo, L. Franchin, R. Ghiraldelli, K. Ikeda, M. Kisaki, F. Molon, A. Muraro, H. Nakano, R. Pasqualotto, G. Serianni, Y. Takeiri, M. Tollin, K. Tsumori and P. Veltri
  • Journal Title: AIP conference proceedings Volume: 1655 Pages: 060005-060005
  • DOI: 10.1063/1.4916474
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Development of spectrally selective imaging system for negative hydrogen ion source (2014)
  • Author(s): K. Ikeda, H. Nakano, K. Tsumori, M. Kisaki, K. Nagaoka, M. Osakabe, Y. Takeiri, and O. Kaneko
  • Journal Title: Review of Scientific Instruments Volume: 85 Issue: 2
  • DOI: 10.1063/1.4842318
  • Peer Reviewed
• [Journal Article] Characteristic of plasma grid bias in large-scaled negative ion source (2014)
  • Author(s): M. Kisaki, K. Tsumori, K. Ikeda, H. Nakano, M. Osakabe, K. Nagaoka, Y. Takeiri and O. Kaneko
  • Journal Title: Review of Scientific Instruments Volume: 85 Issue: 2
  • DOI: 10.1063/1.4854295
  • Peer Reviewed
• [Journal Article] Identification of the extraction structure of H- ions by Hα imaging spectroscopy (2013)
  • Author(s): K Ikeda, H Nakano, K Tsumori, M Kisaki, K Nagaoka, M Osakabe, Y Takeiri and O Kaneko
  • Journal Title: New Journal of Physics Volume: 15 Issue: 10 Pages: 103026-103026
  • DOI: 10.1088/1367-2630/15/10/103026
  • Peer Reviewed
• [Journal Article] Visualization of H⁻ Dynamics in Extraction Region of Negative-Ion Source by H_α Imaging Spectroscopy (2013)
  • Author(s): Katsunori IKEDA, Haruhisa NAKANO, Katsuyoshi TSUMORI, Masashi KISAKI, Kenichi NAGAOKA, Masaki OSAKABE, Yasuhiko TAKEIRI and Osamu KANEKO
  • Journal Title: Plasma and Fusion Research Volume: 8 Issue: 0 Pages: 1301036-1301036
  • DOI: 10.1585/pfr.8.1301036
  • NAID: 130003366292
  • ISSN: 1880-6821
  • Peer Reviewed
• [Journal Article] Operation Summary of Neutral Beam Injection System in the 16th Campaign (2013)
  • Author(s): Takeiri, Y., Tsumori, K., Osakabe, M., Ikeda, K., Nagaoka, K., Nakano, H., Kisaki, M., Asano, E., Kondo, T., Sato, M., Shibuya, M., Komada, S., Sekiguchi, H.
  • Journal Title: Annual Report of National Institute for Fusion Science Volume: April 2012 - March 2013 Pages: 199-199
• [Journal Article] Observation of Reduction Structure of H- Ions at Extraction Region in a Hydrogen Negative Ion Source (2013)
  • Author(s): Katsunori Ikeda
  • Journal Title: Annual Report of National Institute for Fusion Science Volume: April 2012 - March 2013 Pages: 200-200
• [Journal Article] H- Density Profile Parallel to Plasma Grid in H- Source for Neutral Beam (2013)
  • Author(s): Nakano, H., Tsumori, K., Kisaki, M., Shibuya, M., Ikeda, K., Nagaoka, K., Osakabe, M., Kaneko, O., Asano, E., Kondo, T., Sato, M., Sekiguchi, H., Komada, S., and Takeiri, Y.
  • Journal Title: Annual Report of National Institute for Fusion Science Volume: April 2012 - March 2013 Pages: 201-201
• [Journal Article] Polar Distribution of Ion and Electron Saturation Currents of Electro-Negative Plasma in Caesium-Seeded Negative Ion Source (2013)
  • Author(s): Tsumori, K., Nakano, H., Kisaki, M., Ikeda, K., Nagaoka, K., Osakabe, M., Takeiri, Y., Kaneko, O., Shibuya, M., Asano, E., Kondo, T., Sato, M., Sekiguchi and H., Komada, S.
  • Journal Title: Annual Report of National Institute for Fusion Science Volume: April 2012 - March 2013 Pages: 202-202
• [Presentation] ＮＩＦＳ-Ｒ＆Ｄイオン源での統合的負イオンプラズマ計測 (2015)
  • Author(s): K. Tsumori, S. Geng, K. Ikeda, H. Nakano, M. Kisaki, M. Wada, K. Sasaki, S. Nishiyama, G. Serianni, C. Wimmer, P. Agosttineti, E. Sartori, M. Brombin, K. Nagaoka, M. Osakabe, Y. Takeiri, O. Kaneko and NIFS NBI group
  • Organizer: 第32回プラズマ・核融合学会 年会
  • Place of Presentation: 名古屋
  • Year and Date: 2015-11-24
• [Presentation] イメージング計測を用いた大型RF水素負イオン源引出領域の研究 (2015)
  • Author(s): 池田勝則, WUNDERLICH Dirk, 木崎雅志, 津守克嘉, 中野治久, 永岡賢一, GENG Shaofei, 長壁正樹, FANTZ Ursel, 金子修, 竹入康彦
  • Organizer: 第32回プラズマ・核融合学会 年会
  • Place of Presentation: 名古屋
  • Year and Date: 2015-11-24
• [Presentation] Response of charged particle flows to the extraction field in a negative hydrogen ion source for NBI (2015)
  • Author(s): S. Geng, K. Tsumori, H. Nakano, M. Kisaki, K. Ikeda, M. Osakabe, K. Nagaoka, Y. Takeiri, M. Shibuya, and O. Kaneko
  • Organizer: 第32回プラズマ・核融合学会 年会
  • Place of Presentation: 名古屋
  • Year and Date: 2015-11-24
• [Presentation] Recent Studies of Hydrogen Negative Ion Source and Beam Production for NBI in Large Helical Device (2015)
  • Author(s): K. Ikeda, P. Agostinetti, M. Brombin, U. Fantz, S. Geng, O. Kaneko, M. Kisaki, K. Nagaoka, H. Nakano, M. Osakabe, E. Sartori,G. Serianni, Y. Takeiri, K. Tsumori, P. Veltri, C. Wimmer, and D. Wunderlich
  • Organizer: The 25th International Toki Conference
  • Place of Presentation: Toki Gifu, Japan
  • Year and Date: 2015-11-03
  • Int'l Joint Research / Invited
• [Presentation] Depth of Influence on the Plasma by Beam Extraction in a Negative Hydrogen Ion Source for NBI (2015)
  • Author(s): S. Geng, K. Tsumori, H. Nakano, M. Kisaki, K. Ikeda, M. Osakabe, K. Nagaoka, Y. Takeiri, M. Shibuya, and O. Kaneko
  • Organizer: 25th International Toki Conference
  • Place of Presentation: Toki Gifu, Japan
  • Year and Date: 2015-11-03
  • Int'l Joint Research
• [Presentation] Development of millimeter-wave interferometer for electron density measurements with beam extraction in the negative ion source (2015)
  • Author(s): T. Tokuzawa, M. Kisaki, K. Nagaoka, K. Tsumori, K. Ikeda, H. Nakano, S. Geng, M. Osakabe, Y. Takeiri, and O. Kaneko
  • Organizer: 25th International Toki Conference
  • Place of Presentation: Toki Gifu, Japan
  • Year and Date: 2015-11-03
  • Int'l Joint Research
• [Presentation] Behavior of Negative Hydrogen Ion and Its Beam by Bias and Beam Extraction Voltages (2015)
  • Author(s): H. Nakano, K.Tsumori, M. Kisaki, K. Ikeda, K. Nagaoka, M. Osakabe, Y. Takeiri and O. Kaneko
  • Organizer: The 68th Gaseous Electronics Conference, the 9th International Conference on Reactive Plasmas and the 33rd Symposium on Plasma Processing
  • Place of Presentation: Honolulu, U.S.A.
  • Year and Date: 2015-10-12
  • Int'l Joint Research
• [Presentation] Cavity ringdown method for negative-hydrogen-ion measurement in ion source for neutral beam injector (2015)
  • Author(s): H. Nakano,
  • Organizer: The 17th International Symposium on Laser-Aided Plasma Diagnostics
  • Place of Presentation: Sapporo, Hokkaido
  • Year and Date: 2015-09-27
  • Int'l Joint Research / Invited
• [Presentation] Negative Ion Production and Beam Extraction Processes in a Large Ion Source (2015)
  • Author(s): K. Tsumori, K. Ikeda, H. Nakano, M. Kisaki, S. Geng, M. Wada, K. Sasaki, S. Nishiyama, M. Goto, G. Serianni, P. Agostinetti, E. Sartori, M. Brombin, P. Veltri, C. Wimmer, K. Nagaoka, M. Osakabe, Y. Takeiri, and O. Kaneko
  • Organizer: the 16th International Conference on Ion Sources
  • Place of Presentation: New York, USA
  • Year and Date: 2015-09-23
  • Int'l Joint Research / Invited
• [Presentation] Charged Particle Flows in the Beam Extraction Region of a Negative Hydrogen Ion Source for NBI (2015)
  • Author(s): S. Geng, K. Tsumori, H. Nakano, M. Kisaki, K. Nagaoka, K. Ikeda, Y. Takeiri, M. Shibuya and O. Kaneko
  • Organizer: the 16th International Conference on Ion Sources
  • Place of Presentation: New York, USA
  • Year and Date: 2015-09-23
  • Int'l Joint Research
• [Presentation] Balmer-α Spectrum Measurement of the LHD One-Third Ion Source (2015)
  • Author(s): M. Wada, T. Kenmotsu, M. Kisaki, H. Nakano, M. Nishiura, K. Tsumori,
  • Organizer: the 16th International Conference on Ion Sources
  • Place of Presentation: New York, USA
  • Year and Date: 2015-09-23
  • Int'l Joint Research
• [Presentation] Installation of Spectrally Selective Imaging System in RF Negative Ion Source (2015)
  • Author(s): K. Ikeda, D. Wunderlich, U. Fantz, B. Heinemann, M. Kisaki, K. Nagaoka, H. Nakano, M. Osakabe, K. Tsumori, O. Kaneko and Y. Takeiri
  • Organizer: the 16th International Conference on Ion Sources
  • Place of Presentation: New York, USA
  • Year and Date: 2015-09-23
  • Int'l Joint Research
• [Presentation] Optics of the NIFS Negative ion source test stand by infrared calorimetry and numerical modeling (2015)
  • Author(s): P. Veltri , V. Antoni , P. Agostinetti , M. Brombin, K. Ikeda, M. Kisaki, H. Nakano, E. Sartori, G. Serianni, Y. Takeiri and K. Tsumori
  • Organizer: the 16th International Conference on Ion Sources
  • Place of Presentation: New York, USA
  • Year and Date: 2015-09-23
  • Int'l Joint Research
• [Presentation] Pproduction and extraction processes of H- ions in a large scaled negative ion source (2015)
  • Author(s): K. Tsumori, H. Nakano, M. Kisaki, S. Geng, K. Ikeda, K. Nagaoka, M. Osakabe, Y. Takeiri, O. Kaneko
  • Organizer: The 16th International conference on Ion Sources
  • Place of Presentation: New York, USA
  • Year and Date: 2015-08-23 – 2015-08-28
• [Presentation] 水素負イオン源の引出領域における温度と密度分布 (2015)
  • Author(s): 中野治久、津守克嘉, 池田勝則, 木崎雅志, S. Geng, 渋谷真之, 永岡賢一, 長壁正樹, 竹入康彦, 金子修
  • Organizer: 日本物理学会第70回年次大会
  • Place of Presentation: 早稲田大学、東京
  • Year and Date: 2015-03-21 – 2015-03-24
• [Presentation] Consideration of Negative Hydrogen Ion Temperature Measurement with Cavity Ringdown Method (2014)
  • Author(s): H. Nakano
  • Organizer: Plasma Conference 2014
  • Place of Presentation: 朱鷺メッセ、新潟市
  • Year and Date: 2014-11-18 – 2014-11-21
• [Presentation] Spatial Distribution of Negative Hydrogen Ions in the Extraction Region of a Negative Hydrogen Ion Source for NBI (2014)
  • Author(s): Shaofei Geng, Katsuyoshi Tsumori, Haruhisa Nakano, Masashi Kisaki, Yasuhiko Takeiri, Masaki Osakabe, Katsunori Ikeda, Ken-ichi Nagaoka, Osamu Kaneko and Masayuki Shibuya
  • Organizer: Plasma Conference 2014
  • Place of Presentation: 朱鷺メッセ、新潟市
  • Year and Date: 2014-11-18 – 2014-11-21
• [Presentation] Characteristics of Cso and Cs+ in Extraction Region of a Negative Ion Source for NBI (2014)
  • Author(s): K. Tsumori, H. Nakano, M. Kisaki, G. Shaofei, K. Ikeda, K.Nagaoka, M. Osakabe, Y. Takeiri, O. Kaneko, M. Shibuya, and NIFS NBI Group
  • Organizer: Plasma Conference 2014
  • Place of Presentation: 朱鷺メッセ、新潟市
  • Year and Date: 2014-11-18 – 2014-11-21
• [Presentation] Spatial distributions of charged particles and plasma potential before and during beam extraction in a negative hydrogen ion source for NBI (2014)
  • Author(s): Shaofei GENG, Katsuyoshi TSUMORI, Haruhisa NAKANO, Masashi KISAKI, Yasuhiko TAKEIRI, Masaki OSAKABE, Katsunori IKEDA, Ken-ichi NAGAOKA, Osamu KANEKO, Masayuki SHIBUYA
  • Organizer: The 24th International Toki Conference
  • Place of Presentation: Toki, Japan
  • Year and Date: 2014-11-04 – 2014-11-07
• [Presentation] Research progress on ionic plasmas generated in an intense hydrogen negative ion source (2014)
  • Author(s): Y. Takeiri, K. Tsumori, K. Ikeda, H. Nakano, M. Kisaki, K. Nagaoka, T. Tokuzawa, S. Geng, M. Osakabe, O. Kaneko, T. Kondo, M. Sato, M. Shibuya, S. Komada and H. Sekiguchi
  • Organizer: The 4th International Symposium on Negative Ions, Beams and Sources
  • Place of Presentation: IPP Garching, Germany
  • Year and Date: 2014-10-06 – 2014-10-10
  • Invited
• [Presentation] Hydrogen Atom Temperature measured with Wavelength-Modulated Laser Absorption Spectroscopy in Lage Scale Filament Arc Negative Hydrogen Ion Source (2014)
  • Author(s): H. Nakano, S. Nishiyama, M. Goto, K. Tsumori, M. Kisaki, K. Ikeda, K. Nagaoka, M. Osakabe, Y. Takeiri, O. Kaneko and K. Sasaki
  • Organizer: The 4th International Symposium on Negative Ions, Beams and Sources
  • Place of Presentation: IPP Garching, Germany
  • Year and Date: 2014-10-06 – 2014-10-10
• [Presentation] Evaluation of negative ion distribution changes by image processing diagnostic (2014)
  • Author(s): K. Ikeda, H. Nakano, K. Tsumori, M. Kisaki, S. Geng, K. Nagaoka, T. Tokuzawa, M. Osakabe, Y. Takeiri, and O.
  • Organizer: The 4th International Symposium on Negative Ions, Beams and Sources
  • Place of Presentation: IPP Garching, Germany
  • Year and Date: 2014-10-06 – 2014-10-10
• [Presentation] Laser photodetachment diagnostics of a 1/3-size negative hydrogen ion source for NBI (2014)
  • Author(s): S. Geng, K. Tsumori, H. Nakano, M. Kisaki, K. Ikeda, Y. Takeiri, M. Osakabe, K. Nagaoka, and O. Kaneko
  • Organizer: The 4th International Symposium on Negative Ions, Beams and Sources
  • Place of Presentation: IPP Garching, Germany
  • Year and Date: 2014-10-06 – 2014-10-10
• [Presentation] Beamlet Tilting due to Magnetic Field in Beam Accelerator of NBI Source (2014)
  • Author(s): K. Tsumori, G. Serianni, P. Veltri, M. Kisaki, Y. Takeiri, M. Brombin, P. Agostinetti, K. Ikeda, G. Shaofei, H. Nakano, K. Nagaoka, M. Osakabe, V. Antoni, and NIFS-NBI Group.
  • Organizer: The 4th International Symposium on Negative Ions, Beams and Sources
  • Place of Presentation: IPP Garching, Germany
  • Year and Date: 2014-10-06 – 2014-10-10
• [Presentation] Spatial distribution of electron density in large-scaled negative ion source (2014)
  • Author(s): 1. M. Kisaki*, K. Tsumori, K. Ikeda, H. Nakano, S. Geng, K. Nagaoka, T. Tokuzawa, M. Osakabe, Y. Takeiri, O. Kaneko
  • Organizer: The 4th International Symposium on Negative Ions, Beams and Sources
  • Place of Presentation: IPP Garching, Germany
  • Year and Date: 2014-10-06 – 2014-10-10
• [Presentation] Evaluation of H- behavior using a spectrally selective imaging method in hydrogen negative ion source (2014)
  • Author(s): K. Ikeda, H. Nakano, K. Tsumori, M. Kisaki, K. Nagaoka, M. Osakabe, Y. Takeiri, O. Kaneko
  • Organizer: European Physical Society Conferences on Plasma Physics 2014
  • Place of Presentation: Berlin, Germany
  • Year and Date: 2014-06-23 – 2014-06-27
• [Presentation] Influence of bias voltage on H- density in the negative ion source for NBI by Langmuir probe and photodetachment measurements (2014)
  • Author(s): S. F. Geng, K. Tsumori, H. Nakano, M. Kisaki, K. Ikeda, Y. Takeiri, M. Osakabe
  • Organizer: 第10回 核融合エネルギー連合講演会
  • Place of Presentation: つくば国際会議場、つくば市
  • Year and Date: 2014-06-19 – 2014-06-20
• [Presentation] Beamlet Tilting due to Electron Deflection Magnet (2014)
  • Author(s): K. Tsumori, G. Serianni, P. Vertri, M. Kisaki, Y. Takeiri, M. Brombin, P. Agostinetti, A. Vanni,K. Ikeda, G. Shaofei, H. Nakano, M. Osakabe, K. Nagaoka, M. Shibuya, T. Kondo, M. Sato, A. Sekiguchi, S. Komada
  • Organizer: 第10回エネルギー連合講演会
  • Place of Presentation: つくば国際会議場、つくば市
  • Year and Date: 2014-06-19 – 2014-06-20
• [Presentation] 多孔型負イオン源から引き出されたマルチビームレットの相互作用 (2014)
  • Author(s): 1. 木崎雅志、津守克嘉、池田勝則、中野治久、S. Geng、P. Veltri、P. Agostinetti、M. Brombin、G. Serianni、長壁正樹、永岡賢一、竹入康彦、金子修
  • Organizer: 第10回核融合エネルギー連合講演会
  • Place of Presentation: つくば国際会議場、つくば市
  • Year and Date: 2014-06-19 – 2014-06-20
• [Presentation] H- Density Behavior for Positive and Negative Extraction and Bias Voltages (2013)
  • Author(s): Haruhisa Nakano, Katsuyoshi Tsumori, Masashi Kisaki, Masayuki Shibuya, Katsunori Ikeda, Kenichi Nagaoka, Masaki Osakabe, Osamu Kaneko, Eiji Asano, Tomoaki Kondo, Mamoru Sato, Haruro Sekiguchi, Seiji Komada, and Yasuhiko Takeiri
  • Organizer: The 15th International Conference on Ion Sources
  • Place of Presentation: Makuhari Messe, Chiba, Japan
• [Presentation] High-Performance of Negative-Ion-Based Neutral Beam Injectors for Extension of Plasma Parameter Regime in Large Helical Device (2013)
  • Author(s): Y. Takeiri, K. Tsumori, M. Osakabe, K. Ikeda, K. Nagaoka, H. Nakano, M. Kisaki, E. Asano, T. Kondo, M. Sato, M. Shibuya, S. Komada, H. Sekiguchi, O. Kaneko, V. Antoni, G. Serianni, and P. Agostinetti
  • Organizer: Joint 19th International Stellarator/Heliotron Workshop and 16th IEA-RFP Workshop
  • Place of Presentation: Centro Culturale San Gaetano, Padova, Italy
• [Presentation] Development and Physics of Negative Ion Sources for LHD NBI (2013)
  • Author(s): K. Tsumori, H. Nakano, K. Ikeda, M. Kisaki, M. Osakabe, K. Nagaoka, Y. Takeiri, NIFS NBI group, T, Fukuyama, S. Nishioka, T, Shibata, and A. Hatayama
  • Organizer: 55th Annual Meeting of the APS Division of Plasma Physics
  • Place of Presentation: Sheraton Denver Downtown Hotel, Denver, Colorado, USA
  • Invited
• [Presentation] 負イオン源の電極バイアス特性 (2013)
  • Author(s): 木崎雅志、津守克嘉、池田勝則、中野治久、長壁正樹、永岡賢一、竹入康彦、金子修
  • Organizer: プラズマ・核融合学会第３０回年会
  • Place of Presentation: 東京工業大学（東京都目黒区）
• [Presentation] 波長変調レーザー吸収分光法による水素負イオ ン源内の水素原子温度計測 (2013)
  • Author(s): 中野治久, 西山修輔, 後藤基志, 津守克嘉, 木崎雅志, 池田勝則, 渋谷真之, 永岡賢一, 長壁正樹, 浅野英児, 近藤友紀, 佐藤守, 関口温朗, 竹入康彦, 金子修, 佐々木浩一
  • Organizer: プラズマ・核融合学会第３０回年会
  • Place of Presentation: 東京工業大学（東京都目黒区）
• [Presentation] Response of Plasma in Extraction Region to Electrostatic Field
  • Author(s): K. Tsumori, M. Kisaki, K. Ikeda, H. Nakano, M. Osakabe, K. Nagaoka, Y. Takeiri, and O. Kaneko, M. Shibuya, E. Asano, T. Kondo, M. Sato, H. Sekiguchi and S. Komada.
  • Organizer: The 15th International Conference on Ion Sources
  • Place of Presentation: Makuhari Messe, Chiba, Japan
• [Presentation] Optical Observation of Reduction Structure of H- Ions at Extraction Region in Hydrogen Negative Ion Source
  • Author(s): K. Ikeda, H. Nakano, K. Tsumori, M. Kisaki, K. Nagaoka, M. Osakabe, Y. Takeiri, and O. Kaneko
  • Organizer: The 15th International Conference on Ion Sources
  • Place of Presentation: Makuhari Messe, Chiba, Japan
• [Presentation] Characteristic of Plasma Grid Bias in Large-Scaled Negative Ion Source
  • Author(s): M. Kisaki, K. Tsumori, K. Ikeda, H. Nakano, M. Osakabe, K. Nagaoka, Y. Takeiri and O. Kaneko
  • Organizer: The 15th International Conference on Ion Sources
  • Place of Presentation: Makuhari Messe, Chiba, Japan