Effect of energetic ion loss on ICRF heating efficiency and energy confinement time in heliotrons

被引：16

作者：

Murakami, S ^{[1
]}

Nakajima, N

Okamoto, M

Nührenberg, J

机构：

[1] Natl Inst Fus Sci, Oroshi, Toki, Japan

[2] Max Planck Inst Plasmaphys, Greifswald, Germany

来源：

NUCLEAR FUSION | 1999年 / 39卷 / 09期

关键词：

D O I：

10.1088/0029-5515/39/9/309

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

The ICRF heating efficiency and the global energy confinement time during ICRF heating are investigated, including the effect of energetic ion loss in heliotrons. The approximate formula of ICRF heating efficiency is derived using results based on Monte Carlo simulations (Murakami, S., et al., Fusion Eng. Des. 26 (1995) 209). The global energy confinement time including the energetic ion effect can be expressed in heliotrons in terms of ICRF heating power, plasma density and magnetic field strength. Results in plasmas at CHS show a systematic decrease of the global energy confinement time due to energetic ion loss from the assumed energy confinement scaling law, which is consistent with the experimental observations. The model is also applied to ICRF minority heating in LHD plasmas in two cases of typical magnetic configurations. A clear increase of the global energy confinement time due to the stored energy of energetic tail ions is obtained in the 'orbit improved' configuration, while a decrease is observed in the 'standard' configuration.

引用

页码：1165 / 1173

页数：9

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