Review of ICR Heating on the Spherical Tokamak Globus-M

被引:3
|
作者
Dyachenko, V. V. [1 ]
Ayushin, B. B. [1 ]
Gusev, V. K. [1 ]
Khitrov, S. A. [1 ]
Chemyshev, F. V. [1 ]
Mironov, M. I. [1 ]
Petrov, Yu. V. [1 ]
Sakharov, N. V. [1 ]
Shcherbinin, O. N. [1 ]
机构
[1] RAS, AF Ioffe Phys Tech Inst, St Petersburg 194021, Russia
来源
关键词
spherical tokamak; RF heating; PLASMA;
D O I
10.1063/1.3273726
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 results of experiments on the RF heating of hydrogen-deuterium plasma at ion cyclotron frequencies in the Globus-M spherical tokamak are presented. RF power up to 200 kW at frequencies about 7.5-9 MHz fed via a single-loop antenna led to an increase in the ion temperature from 180 eV up to 400 eV in the best case. High heating efficiency is maintained at high H-concentration (up to 70%). Characteristic times of the ion temperature buildup and decay corresponded to the ion energy confinement time. If the second hydrogen harmonic is arranged in front of antenna, on-axis ion heating becomes worse. It is shown, that in Globus conditions graphite shielding of an inner surface of a vacuum chamber decreases heating due to surface absorption of RF power. Simulation of processes of RF power absorption is performed also. For modeling I-D wave code was used including all possible mechanisms of RF power absorption.
引用
收藏
页码:197 / 200
页数:4
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