Characteristics of negative hydrogen ions near the low work function surface in a Radio Frequency negative ion source

• Project/Area Number: 22860009
• Research Category: Grant-in-Aid for Research Activity Start-up
• Allocation Type: Single-year Grants
• Research Field: Nuclear fusion studies
• Research Institution: Tohoku University
• Principal Investigator: TANAKA Nozomi 東北大学, 大学院・工学研究科, 助教 (60581296)
• Project Period (FY): 2010 – 2011
• Project Status: Completed (Fiscal Year 2011)
• Budget Amount: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000); Fiscal Year 2011: ¥1,495,000 (Direct Cost: ¥1,150,000、Indirect Cost: ¥345,000); Fiscal Year 2010: ¥1,625,000 (Direct Cost: ¥1,250,000、Indirect Cost: ¥375,000)
• Keywords: プラズマ加熱 / 水素負イオン源 / RF負イオン源 / 負イオン密度計測 / Cavity-Ring-Down法

Research Abstract

Characteristics of negative hydrogen ion (H^-)density in a RF ion source were studied. Cavity Ring Down (CRD)method was utilized for H^-measurements. The H^-density increased as the electron density with increase of input RF power or improvement of plasma confinement. A large increase in H^-density was observed with decreasing gas pressure, and increase of electron temperature was observed in the driver. This implies : 1)increase of vibrationally excited hydrogen molecules that forms H^-ions in the source, and 2)decrease of dissociation process of H^-due to collisions with hydrogen molecules.

Research Products

• [Journal Article] Laser measurement of H^-ions in a field-effect-transistor based radio frequency ion source (2012)
  • Author(s): N. Tanaka, T. Matsuno, T. Funaoi, A. Ando, Y. Tauchi, H. Nakano, K. Tsumori, Y. Takeiri
  • Journal Title: Review of Scientific Instrument Volume: 83 Pages: 1-3
  • Peer Reviewed
• [Journal Article] H^-beam extraction from a cesium seeded field effect transistor based radio frequency negative hydrogen ion source (2012)
  • Author(s): A. Ando, T. Matsuno, T. Funaoi, N. Tanaka, K. Tsumori, Y. Takeiri
  • Journal Title: Review of Scientific Instruments Volume: 83 Pages: 1-3
  • Peer Reviewed
• [Journal Article] Laser measurement of H-ions in a field-effect-transistor based radio frequency ion source (2012)
  • Author(s): N. Tanaka, T. Matsuno, T. Funaoi, A. Ando, Y. Tauchi, H. Nakano, K. Tsumori, Y. Takeiri
  • Journal Title: Review of Scientific Instruments Volume: 83 Issue: 2
  • DOI: 10.1063/1.3680549
  • Peer Reviewed
• [Journal Article] H^- beam extraction from a cesium seeded field effect transistor based radio frequency negative hydrogen ion source (2012)
  • Author(s): A.Ando
  • Journal Title: Review of Scientific Instruments Volume: 83 Issue: 2
  • DOI: 10.1063/1.3684720
  • Peer Reviewed
• [Journal Article] Characteristics of Hydrogen Negative Ion Source with FET based RF system (2011)
  • Author(s): A. Ando, T. Matsuno, T. Funaoi, N. Tanaka, Y. Takeiri, K. Tsumori
  • Journal Title: AIP conf. Proc Volume: 1390 Pages: 322-328
  • Peer Reviewed
• [Journal Article] Characteristics of Hydrogen Negative Ion Source with FET based RF system (2011)
  • Author(s): A.Ando, et.al.
  • Journal Title: AIP Conference Proceedings Volume: 1390 Pages: 322-328
  • Peer Reviewed
• [Presentation] 高周波イオン源におけるCRD法を用いた水素負イオン密度計測 (2012)
  • Author(s): 田中のぞみ、松野哲郎、船生拓也、安藤晃、田内康、津守克嘉、竹入康彦
  • Organizer: 日本物理学会第67回年次大会
  • Place of Presentation: 兵庫県西宮市(関西学院大学西宮上ケ原キャンパス)
  • Year and Date: 2012-03-26
• [Presentation] 高周波イオン源におけるCRD法を用いた水素負イオン密度計測 (2012)
  • Author(s): 田中のぞみ
  • Organizer: 日本物理学会第67回年次大会
  • Place of Presentation: 関西学院大学西宮上ケ原キャンパス(兵庫県西宮市)
  • Year and Date: 2012-03-26
• [Presentation] Production and Measurement of Negative Hydrogen Ions in a FET based RF Ion Source (2011)
  • Author(s): N. Tanaka, T. Matsuno, T. Funaoi, A. Ando, Y. Tauchi, H. Nakano, K. Tsumori, Y. Takeiri
  • Organizer: 21st International Toki Conference
  • Place of Presentation: Toki, Gifu, Japan
  • Year and Date: 2011-11-28
• [Presentation] Production and Measurement of Negative Hydrogen Ions in a PET based RF Ion Source (2011)
  • Author(s): N.Tanaka
  • Organizer: 21st International Toki Conference
  • Place of Presentation: Ceratopia Toki (Gifu, Japan)
  • Year and Date: 2011-11-28
• [Presentation] 高周波負イオン源内における水素負イオンのレーザー計測-Diagnostics of Negative Hydrogen Ions in a RF Ion Source by Using YAG laser (2011)
  • Author(s): 田中のぞみ、松野哲郎、船生拓也、安藤晃、田内康、津守克嘉、竹入康彦
  • Organizer: Plasma Conference 2011
  • Place of Presentation: 石川県金沢市(石川音楽堂)
  • Year and Date: 2011-11-22
• [Presentation] 高周波負イオン源内における水素負イオンのレーザー計測 (2011)
  • Author(s): 田中のぞみ
  • Organizer: Plasma Conference 2011
  • Place of Presentation: 石川音楽堂(石川県金沢市)
  • Year and Date: 2011-11-22
• [Presentation] Laser measurement of H^-ions in a FET based RF ion source (2011)
  • Author(s): N. Tanaka, T. Matsuno, T. Funaoi, A. Ando, Y. Tauchi, H. Nakano, K. Tsumori, Y. Takeiri
  • Organizer: 14th International Conference on Ion Sources
  • Place of Presentation: Gairdini-Naxos, Italy
  • Year and Date: 2011-09-13
• [Presentation] Laser measurement of H^- ions in a FET based RF ion source (2011)
  • Author(s): N.Tanaka
  • Organizer: 14th International Conference on Ion Sources
  • Place of Presentation: Giardini-Naxos, Italy
  • Year and Date: 2011-09-13
• [Presentation] H^- beam extraction from a cesium seeded field effect transistor based radio frequency negative hydrogen ion source (2011)
  • Author(s): A.Ando
  • Organizer: 14th International Conference on Ion Sources
  • Place of Presentation: Gairdini-Naxos, Italy
  • Year and Date: 2011-09-13
• [Presentation] 高周波負イオン源から引き出されたH-ビームの基礎特性 (2010)
  • Author(s): 田中のぞみ、松野哲郎、船生拓也、安藤晃、田内康、津守克嘉、竹入康彦
  • Organizer: プラズマ・核融合学会第27回年会(30pC02)
  • Place of Presentation: 北海道札幌市(北海道大学学術交流会館)
  • Year and Date: 2010-11-30
• [Presentation] RFイオン源における水素負イオン生成 (2010)
  • Author(s): 松野哲郎、船生拓也、田中のぞみ、安藤晃、田内康、津守克嘉、竹入康彦
  • Organizer: プラズマ・核融合学会第27回年会(30P18)
  • Place of Presentation: 北海道札幌市(北海道大学学術交流会館)
  • Year and Date: 2010-11-30
• [Presentation] 高周波負イオン源から引き出されたH-ビームの基礎特性 (2010)
  • Author(s): 田中のぞみ
  • Organizer: プラズマ・核融合学会第27回年会
  • Place of Presentation: 北海道札幌市
  • Year and Date: 2010-11-30
• [Presentation] RFイオン源における水素負イオン生成 (2010)
  • Author(s): 松野哲郎
  • Organizer: プラズマ・核融合学会第27回年会
  • Place of Presentation: 北海道札幌市
  • Year and Date: 2010-11-30
• [Presentation] Characteristics of Hydrogen Negative Ion Source with FET based RF system (2010)
  • Author(s): A.Ando
  • Organizer: 2^<nd> International Symposium on Negative Ions, Bearns and Sources
  • Place of Presentation: 岐阜県高山市
  • Year and Date: 2010-11-19