Open AccessStudy of the charged particle flow near the plasma grid in negative ion source
Author(s) -
S. Masaki,
H. Nakano,
E. Rattanawongnara,
K. Nagaoka,
K. Ikeda,
Y. Fujiwara,
M. Osakabe,
M. Wada,
K. Tsumori
Publication year - 2022
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/2244/1/012059
Subject(s) - plasma , ion , langmuir probe , atomic physics , electric field , particle (ecology) , charged particle , deuterium , hydrogen , flow (mathematics) , extraction (chemistry) , chemistry , plasma diagnostics , physics , mechanics , nuclear physics , geology , oceanography , organic chemistry , quantum mechanics , chromatography
Flows of the charged particles in hydrogen (H) and deuterium (D) plasmas were measured with the single-tip directional Langmuir probe. The flow patterns of positive and negative ions have been constructed from the data by moving the probe near the plasma grid. The positive ion flow from driver to extraction regions showed the different velocity equivalent to the mass difference between H and D. The negative ion flow indicated the surface production of negative ions on the plasma grid, and changed the direction corresponding to the magnitude of the extraction electric field.