Influence of Nitrogen Ratio on Plasma Detachment during Combined Seeding with Hydrogen on Divertor Simulation Experiment of GAMMA 10/PDX

• GAMO Hiroki

  Plasma Research Center, University of Tsukuba

• EZUMI Naomichi

  Plasma Research Center, University of Tsukuba

• SUGIYAMA Tsukasa

  Plasma Research Center, University of Tsukuba

• NOJIRI Kunpei

  Plasma Research Center, University of Tsukuba

• KONDO Ayane

  Plasma Research Center, University of Tsukuba

• HIRATA Mafumi

  Plasma Research Center, University of Tsukuba

• KOHAGURA Junko

  Plasma Research Center, University of Tsukuba

• YOSHIKAWA Masayuki

  Plasma Research Center, University of Tsukuba

• NAKASHIMA Yousuke

  Plasma Research Center, University of Tsukuba

• HWANGBO Dogyun

  Plasma Research Center, University of Tsukuba

• SAKAMOTO Mizuki

  Plasma Research Center, University of Tsukuba

• PERILLO Renato

  University of California San Diego

• KUWABARA Tatsuya

  Graduate School of Engineering, Nagoya University

• TANAKA Hirohiko

  Graduate School of Engineering, Nagoya University

• OHNO Noriyasu

  Graduate School of Engineering, Nagoya University

• SAWADA Keiji

  Faculty of Engineering, Shinshu University

• TONEGAWA Akira

  Graduate School of Science, Tokai University

• MASUZAKI Suguru

  National Institute for Fusion Science

抄録

Influences of nitrogen ratio on plasma detachment and molecular activated recombination (MAR) processes during combined seeding with hydrogen have been investigated utilizing end-loss plasma in the GAMMA 10/PDX tandem mirror. Additional gases were injected under the condition that hydrogen partial pressure was fixed and nitrogen partial pressure was changed from 0% - 10% compared to that of hydrogen. Electron density and ion flux further decrease with increasing nitrogen ratio. In addition, it is suggested that the hydrogen-MAR process that begins with dissociative attachment is suppressed during combined seeding of nitrogen and hydrogen. Observed emission spectrum of NH radicals suggests that the density of NH increases as nitrogen ratio increases and nitrogen-induced MAR efficiently contributes to the reduction of particle flux.

収録刊行物

• Plasma and Fusion Research

  Plasma and Fusion Research 16 (0), 2402041-2402041, 2021-03-19

  一般社団法人 プラズマ・核融合学会

キーワード

• divertor
• detached plasma
• nitrogen
• MAR
• GAMMA 10/PDX

詳細情報

• CRID: 1390569236138164224
• NII論文ID: 130008028416
• DOI: 10.1585/pfr.16.2402041
• ISSN: 18806821
• Web Site: https://www.jstage.jst.go.jp/article/pfr/16/0/16_2402041/_pdf
• 本文言語コード: en
• データソース種別:
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  • Crossref
  • CiNii Articles
  • KAKEN
• 抄録ライセンスフラグ: 使用不可