Numerical analysis of isotope effect in NIFS negative ion source

Ryo Kato, Kazuo Hoshino, Haruhisa Nakano, Takanori Shibata, Kenji Miyamoto, Kengo Iwanaka, Katsuya Hayashi, Akiyoshi Hatayama

Research output: Contribution to journalConference articlepeer-review


Result of hydrogen (H) and deuterium (D) experiments done by NIFS research and development negative ion source (RNIS) demonstrated that the co-extracted electron current with the negative ions and the electron density in the driver region in the D experiment have been around three times higher than that in the H experiment. To investigate mechanism of this difference, electron transport simulation using 3D kinetic particle tracking model KEIO-MARC code has been modified and applied to analysis of the isotope effect in the NIFS negative ion source. Simulation result suggests that impacts of isotope effects of sheath potential drop, coulomb collisions, and some reactions of ground state molecules and ions on the electron density is not large to explain the experimental result of the increase in the electron density in the plasma.

Original languageEnglish
Article number012035
JournalJournal of Physics: Conference Series
Issue number1
Publication statusPublished - 2022 Apr 25
Event19th International Conference on Ion Sources, ICIS 2021 - Virtual, Online
Duration: 2021 Sept 202021 Sept 24

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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