Study of particle transport in the ergodic layer based on the Doppler-free spectroscopy

• Project/Area Number: 21340174
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Plasma science
• Research Institution: National Institute for Fusion Science
• Principal Investigator: GOTO Motoshi 核融合科学研究所, ヘリカル研究部, 准教授 (00290916)
• Co-Investigator(Kenkyū-buntansha): SASAKI Koichi 北海道大学, 工学(系)研究科(研究院), 教授 (50235248) ; MORITA Shigeru 核融合科学研究所, ヘリカル研究部, 教授 (80174423)
• Project Period (FY): 2009 – 2012
• Project Status: Completed (Fiscal Year 2012)
• Budget Amount: ¥13,000,000 (Direct Cost: ¥10,000,000、Indirect Cost: ¥3,000,000); Fiscal Year 2012: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000); Fiscal Year 2011: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000); Fiscal Year 2010: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000); Fiscal Year 2009: ¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
• Keywords: ドップラーフリー分光 / 半導体レーザー / 水素原子 / ゼーマン効果 / バルマーα線 / バルマーアルファ線

Research Abstract

We have developed the technique of absorption spectroscopy for a hydrogen atom line with diode laser aiming at determination of the ionization location of hydrogen atoms in fusion plasma. An ultra-high wavelength resolution that is never available with usual emission spectroscopy technique has been realized with a relatively simple measurement system. Furthermore, we have observed several interesting phenomena like unexpected large tail components and anomalous crossover signals that could be related to the momentum relaxation mechanism of particles in plasma.

Research Products

• [Journal Article] Evaluation of particle source rate and its influence on particle transport in fusion plasma (2012)
  • Author(s): M. Goto, K. Sawada, K. Fujii, M. Hasuo, S. Morita
  • Journal Title: J. Phys.: Conf. Ser. Volume: Vol. 397
  • Peer Reviewed
• [Journal Article] Characteristics of saturation spectroscopy at the Balmer-α line of atomic hydrogen in a linear magnetized plasma source (2012)
  • Author(s): R. Asakawa, M. Goto, K. Sasaki,
  • Journal Title: Journal of Instrumentation Volume: Vol. 7
  • NAID: 120005946618
  • Peer Reviewed
• [Journal Article] Evaluation of particle source rate and its influence on particle transport in fusion plasma (2012)
  • Author(s): Motoshi Goto
  • Journal Title: Journal of Physics: Conference Series Volume: 397 Pages: 012023-012023
  • DOI: 10.1088/1742-6596/397/1/012023
  • Peer Reviewed
• [Journal Article] Characteristics of saturation spectroscopy at the Balmer-α line of atomic hydrogen in a linear magnetized plasma source (2012)
  • Author(s): R.Asakawa, M.Goto, K.Sasaki
  • Journal Title: Journal of Instrumentation Volume: 7 Issue: 01 Pages: C01018-C01018
  • DOI: 10.1088/1748-0221/7/01/c01018
  • NAID: 120005946618
  • Peer Reviewed
• [Journal Article] Evaluation of hydrogen atom density in the plasma core region based on the Balmer- α line profile (2011)
  • Author(s): M. Goto, K. Sawada, K. Fujii, M. Hasuo, S. Morita
  • Journal Title: Nuclear Fusion Volume: Vol. 51
  • Peer Reviewed
• [Journal Article] Evaluation of hydrogen atom density in the plasma core region based on the Balmer- α line profile (2011)
  • Author(s): M.Goto, K.Sawada, et al.
  • Journal Title: Nuclear Fusion Volume: 51
  • Peer Reviewed
• [Journal Article] Self-reversal in hydrogen Lyman-α line profile", Plasma and Fusion Research (2010)
  • Author(s): M. Goto, S. Morita
  • Journal Title: Fusion Research Volume: Vol. 5
  • Peer Reviewed
• [Journal Article] Passive spectroscopy in visible, VUV, and x-ray ranges for LHD diagnostics (2010)
  • Author(s): M. Goto, S. Morita, H. Y. Zhou, C. F. DongDong, LHD experiment group
  • Journal Title: Fusion Science and Technology Volume: Vol. 58 Pages: 394-4111
  • Peer Reviewed
• [Presentation] Homogeneous Line Width Measurement of Absorption Spectrum of Metastable Argon by Saturation Spectroscopy (2013)
  • Author(s): S. Nishiyama, M. Goto, K. Sasaki
  • Organizer: 30th Symposium on Plasma Processing
  • Place of Presentation: アクトシティ浜松・研修交流センター
• [Presentation] アルゴン 4s[3/2]^o_2 - 5p[3/2]_2 スペクトルの飽和吸収分光計測 (2013)
  • Author(s): 西山修輔
  • Organizer: 応用物理学会
  • Place of Presentation: 神奈川工科大学
• [Presentation] Fine structure of Balmer- α line of atomic hydrogen measured by saturation spectroscopy (2012)
  • Author(s): S. Nishiyama, M. Goto, K. Sasaki
  • Organizer: Gaseous Electronics Conference
  • Place of Presentation: The University of Texas at Austin
• [Presentation] Evaluation of particle source rate and its influence on particle transport in fusion plasma (2012)
  • Author(s): M. Goto, K. Sawada, K. Fujii, M. Hasuo, S. Morita,
  • Organizer: 21st International Conference on Spectral Line Shapes
  • Place of Presentation: St. Petersburg, Russia
• [Presentation] 飽和吸収分高計測による水素原子バルマーアルファ線の微細スペクトル構造 (2012)
  • Author(s): 西山修輔
  • Organizer: 応用物理学会
  • Place of Presentation: 愛媛大学・松山大学
• [Presentation] Fine structure of Balmer-α line of atomic hydrogen measured by saturation spectroscopy (2012)
  • Author(s): Shusuke Nishiyama
  • Organizer: Gaseous Electronics Conference
  • Place of Presentation: The University of Texas at Austin
• [Presentation] 有磁場水素プラズマにおける水素原子バルマーアルファ線の飽和吸収分光スペクトル特性 (2011)
  • Author(s): 佐々木浩一
  • Organizer: Plasma Conference 2011
  • Place of Presentation: 石川県立音楽堂
  • Year and Date: 2011-11-22
• [Presentation] 独立ポンプレーザーを用いて観測した水素原子バルマーアルファ線の飽和吸収スペクトル (2011)
  • Author(s): 西山修輔
  • Organizer: Plasma Conference 2011
  • Place of Presentation: 石川県立音楽堂
  • Year and Date: 2011-11-22
• [Presentation] Doppler-free spectra of Balmer-α line of atomic hydrogen measured by saturation spectroscopy in a linear magnetized plasma source (2011)
  • Author(s): 佐々木浩一
  • Organizer: 64th Gaseous Electronics Conference
  • Place of Presentation: Salt Lake City, USA
  • Year and Date: 2011-11-15
• [Presentation] Doppler-free spectra of Balmer-α line of atomic hydrogen measured by saturation spectroscopy in a linear magnetized plasma source (2011)
  • Author(s): 佐々木浩一
  • Organizer: 64^<th> Gaseous Electronics Conference
  • Place of Presentation: Salt Lake City, USA
  • Year and Date: 2011-11-15
• [Presentation] "Characteristics of saturation spectroscopy at the Balmer- α line of atomic hydrogen in a linear magnetized plasma source (2011)
  • Author(s): 佐々木浩一
  • Organizer: Laser-Aided Plasma Diagnostics
  • Place of Presentation: ShineVille Resort, Jeju, Korea
  • Year and Date: 2011-10-12
• [Presentation] Characteristics of saturation spectroscopy at the Balmer-α line of atomic hydrogen in a linear magnetized plasma source (2011)
  • Author(s): 佐々木浩一
  • Organizer: Laser-Aided Plasma Diagnostics
  • Place of Presentation: Shine Ville Resort, Jeju, Korea
  • Year and Date: 2011-10-12
• [Presentation] 水素原子バルマーアルファ線の飽和吸収分光計測における飽和特性 (2011)
  • Author(s): 浅川れんげ, 河野明廣, 後藤基志, 佐々木浩一, サデギ ナダー
  • Organizer: 応用物理学会
  • Place of Presentation: 山形大学
  • Year and Date: 2011-03-09
• [Presentation] 有磁場水素プラズマにおける水素原子バルマーアルファ線の飽和吸収スペクトル (2010)
  • Author(s): 浅川れんげ, 河野明廣, 後藤基志, 佐々木浩一
  • Organizer: 応用物理学会
  • Place of Presentation: 長崎大学
  • Year and Date: 2010-09-15
• [Presentation] 飽和分光法による水素原子バルマーアルファ線のゼーマン分裂スペクトル測定 (2010)
  • Author(s): 浅川れんげ, 後藤基志, 河野明廣, 佐々木浩一
  • Organizer: 電気関係学会東海支部連合大会
  • Place of Presentation: 中部大学
  • Year and Date: 2010-08-30
• [Presentation] 水素原子バルマーアルファ線の半導体レーザー吸収分光計測における飽和特性 (2010)
  • Author(s): 浅川れんげ, 後藤基志, 佐々木浩一
  • Organizer: 第57回応用物理学関係連合講演会
  • Place of Presentation: 東海大学湘南キャンパス
  • Year and Date: 2010-03-17
• [Presentation] Saturation of the Balmer- α line of atomic hydrogen in diode laser absorption spectroscopy (2010)
  • Author(s): R. Asakawa, M. Goto, K. Sasaki
  • Organizer: The 3rd International conference on plasma-nano technology & science
  • Place of Presentation: 名城大学
  • Year and Date: 2010-03-11
• [Presentation] Saturation of the Balmer-α line of atomic hydrogen in diode laser absorption spectroscopy (2010)
  • Author(s): 浅川れんげ, 後藤基志, 佐々木浩一
  • Organizer: The 3^<rd> International conference on plasma-nano technology & science
  • Place of Presentation: 名城大学
  • Year and Date: 2010-03-11
• [Presentation] Spectroscopic measurements for magnetic confined fusion plasma in LHD (2010)
  • Author(s): M. Goto, S. Morita
  • Organizer: 日本分光 学会,平成 22 年度年次講演会
  • Place of Presentation: 京都大学
• [Presentation] Evaluation of neutral hydrogen density in the plasma core region based on the Balmer‐α line profile (2010)
  • Author(s): M. Goto, K. Sawada, K. Fujii, M. Hasuo, S. Morita
  • Organizer: 20th International Conference on Spectral Line Shapes
  • Place of Presentation: St. John's, Canada