RADIAL TRANSPORT OF HIGH-ENERGY IONS CAUSED BY LOW-FREQUENCY FLUCTUATIONS IN THE GAMMA10 TANDEM MIRROR

被引：4
|
作者：
Ichimura, M. [1 ]
Yamaguchi, Y. [1 ]
Ikezoe, R. [1 ]
Imai, Y. [1 ]
Murakami, T. [1 ]
Iwai, T. [1 ]
Yokoyama, T. [1 ]
Sato, T. [1 ]
Ugajin, Y. [1 ]
Imai, T. [1 ]
机构：
[1] Univ Tsukuba, Plasma Res Ctr, Tsukuba, Ibaraki 3058577, Japan
来源：
FUSION SCIENCE AND TECHNOLOGY | 2011年 / 59卷 / 1T期
关键词：
INSTABILITY; PLASMAS;
D O I：
10.13182/FST11-A11583
中图分类号：
TL [原子能技术]; O571 [原子核物理学];
学科分类号：
0827 ; 082701 ;
摘要：
Plasmas with high ion-temperature of several keV have been produced by using ion-cyclotron range of frequency (ICRF) heating in the GAMMA 10 tandem mirror. In such high performance plasmas, high and low-frequency fluctuations are excited and ions trapped in the magnetic field interact with such fluctuations. Three types of wave-particle interactions have been observed in the GAMMA 10 tandem mirror. The turning point diffusion near the ion cyclotron resonance layer has been observed in minimum-B configuration on the anchor cell. Pitch angle scattering of high-energy ions due to the AIC modes and low-frequency waves which have differential frequencies between discrete peaks of the AIC modes are clearly detected The drift-type fluctuations are clearly observed in the central cell. By using a semiconductor detector, high-energy ions are detected at the radial location far from the plasma edge. The fluctuation, of which frequency is the same as that of drift-type fluctuation, is observed in the signal of high-energy ions. From the pitch angle distribution of the phase differences between both fluctuations, radial transport of high-energy ions caused by drift-type fluctuations near their turning points in the confining mirror field is suggested in the experiments.
引用
收藏
页码：98 / 103
页数：6
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