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

页码：98 / 103

页数：6