2-D PSD Diagnostic System for the Pellet Trajectory in LHD Plasmas

• HOSHINO Mitsuyasu

  Department of Energy Engineering and Science, Nagoya University, Nagoya 464-8603, Japan

• SAKAMOTO Ryuichi

  National Institute for Fusion Science, Toki 509-5292, Japan

• YAMADA Hiroshi

  National Institute for Fusion Science, Toki 509-5292, Japan The Graduate University for Advanced Studies, SOKENDAI, Hayama 240-0193, Japan

• ITOH Yasuhiko

  National Institute for Fusion Science, Toki 509-5292, Japan

• KUMAGAI Kohki

  The Graduate University for Advanced Studies, SOKENDAI, Hayama 240-0193, Japan

• KUMAZAWA Ryuhei

  National Institute for Fusion Science, Toki 509-5292, Japan

• WATARI Tetsuo

  National Institute for Fusion Science, Toki 509-5292, Japan

• the LHD Experimental Group

  National Institute for Fusion Science, Toki 509-5292, Japan

抄録

Ablation of a solid hydrogen pellet in hot plasmas of Large Helical Device (LHD) has been studied. A position sensitive detector (PSD) diagnostics has been newly installed to measure the trajectory of ablating pellets. 2-D diagnostics enables the measurement with high time (1 MHz) and spatial resolutions (80 μm). A 3-D pellet trajectory can be described by a combination of 2-D images and information of initial pellet direction and velocity. A deflection of the pellet trajectory in the neutral beam injection (NBI) heated plasmas of LHD has been observed. Means of improving the measurement accuracy of this system are also discussed.

収録刊行物

• Plasma and Fusion Research

  Plasma and Fusion Research 3 002-002, 2008

  一般社団法人 プラズマ・核融合学会

キーワード

• fueling
• solid hydrogen
• ablation
• pellet trajectory
• position sensitive detector
• rocket effect
• Large Helical Device

詳細情報

• CRID: 1390001205253747584
• NII論文ID: 130000263884
• DOI: 10.1585/pfr.3.002
• ISSN: 18806821
• Web Site: http://www.jstage.jst.go.jp/article/pfr/3/0/3_0_002/_pdf
• 本文言語コード: en
• データソース種別:
  • JaLC
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可