抄録
A high ion temperature (Ti) mode is observed for neutral beam heated plasmas in the Compact Helical System (CHS) heliotron/torsatron. The high Ti mode plasma is characterized by a high central ion temperature, Ti(O), and is associated with a peaked electron density profile produced by neutral beam fuelling with low wall recycling. Transition from L mode to high Ti mode has been studied in CHS. Ti(0) in the high Ti mode discharges reaches 1 keV, which is 2.5 times higher than that in the L mode discharges. The ion thermal diffusivity is significantly reduced by a factor of more than 2-3 in the high Ti mode plasma. The ion loss cone is observed in neutral particle flux in the energy range 1-6 keV with a narrow range of pitch angle (90°±20°) in the high Ti mode. However, the degradation of ion energy confinement due to this loss cone is negligible.
本文言語 | 英語 |
---|---|
ページ(範囲) | 1649-1658 |
ページ数 | 10 |
ジャーナル | Nuclear Fusion |
巻 | 39 |
号 | Special Issu |
DOI | |
出版ステータス | 出版済み - 1999 |
外部発表 | はい |
!!!All Science Journal Classification (ASJC) codes
- 核物理学および高エネルギー物理学
- 凝縮系物理学