Ripple enhanced banana drift loss at the outboard wall during ICRF/NBI heating in JT-60U

被引：23

作者：

Ikeda, Y ^{[1
]}

Tobita, K ^{[1
]}

Hamamatsu, K ^{[1
]}

Ushigusa, K ^{[1
]}

Naito, O ^{[1
]}

Kimura, H ^{[1
]}

机构：

[1] JAERI,FUS PROGRAM DIV,CHIYODA KU,TOKYO 100,JAPAN

来源：

NUCLEAR FUSION | 1996年 / 36卷 / 06期

关键词：

D O I：

10.1088/0029-5515/36/6/I07

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：

Ripple enhanced banana drift loss of fast ions is studied on the basis of heat load measurements at the first wall near the outer equatorial plane in JT-60U. Hot spots in the ion cyclotron range of frequency (ICRF) and neutral beam injection (NBI) heating are observed at the outboard wall by using an infrared camera. In ICRF heating, the total heat load to the wall is around 5% of the injected ICRF power when the plasma-wall clearance gap is less than 0.1m. The heat flux on the wail increases with the ICRF power and decreases strongly with the plasma density, which is consistent with Fokker-Planck calculations. In NBI heating, hot spots are observed at almost the same positions, and the heat flux and position agree with the banana drift loss as predicted by an orbit following Monte Carlo code.

引用

页码：759 / 767

页数：9

共 17 条

[1] IMPERFECT AXISYMMETRY IN TOKAMAK CONFIGURATION [J].