Numerical study of different electron density observed in Hydrogen and Deuterium ion source plasmas

T. Shibata, R. Kato, H. Nakano, K. Hayashi, J. Sato, K. Miyamoto, K. Hoshino, A. Hatayama

研究成果: Conference article査読

抄録

Sequences of hydrogen (H) and deuterium (D) experiments have been done by NIFS research and development negative ion source (RNIS) for the deuterium NBI development. In the experiments, the co-extracted electron current with the negative ions and the electron density in the plasma generation region in the D experiment have been around three times higher than that in the H experiment. To explain the difference of the electron density in the RNIS driver region, a zero-dimensional numerical model is developed in the present study. The model only focuses on the isotope effect for vibrationally excited level of electronically grounded state molecules and its relevant cross-sections. The calculation results show that difference of the ionization channel numbers via molecular vibrationally excited states could be a reason to enhance ionization rate in D plasma.

本文言語English
論文番号012002
ジャーナルJournal of Physics: Conference Series
2244
1
DOI
出版ステータスPublished - 2022 4月 25
イベント19th International Conference on Ion Sources, ICIS 2021 - Virtual, Online
継続期間: 2021 9月 202021 9月 24

ASJC Scopus subject areas

  • 物理学および天文学(全般)

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