Investigation of anomalous Doppler instability in ohmic and LHCD discharges in the HT-7 tokamak

被引：1

作者：

Lu, H. W. ^{[1
]}

Hu, L. Q. ^{[1
]}

Ling, B. L. ^{[1
]}

Lin, S. Y. ^{[1
]}

Zhou, R. J. ^{[1
]}

Zhong, G. Q. ^{[1
]}

Ping, Xu ^{[1
]}

Wang, S. F. ^{[1
]}

机构：

[1] China Acad Sci, Inst Plasma Phys, Hefei 230030, Peoples R China

来源：

PHYSICA SCRIPTA | 2010年 / 81卷 / 02期

关键词：

ELECTRON-BEAM INSTABILITY; HYBRID CURRENT DRIVE; RUNAWAY ELECTRONS; STOCHASTIC-INSTABILITY; OSCILLATIONS; PERFORMANCE; DEVICE; PLASMA;

D O I：

10.1088/0031-8949/81/02/025503

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We present the results of our experimental studies on a discharge in the Hefei Tokamak-7 (HT-7) device with a specific instability whose emergence coincides with a sudden jump in electron cyclotron emission (ECE) that shows the transverse energy of the plasma. It is shown that, in this slide-away discharge regime, the current is carried by a relatively small group of runaway electrons and that the period of high-frequency small-amplitude oscillations varies from 1 to 2 ms, which depends on the value of the loop voltage in ohmic discharges. In low hybrid current drive (LHCD) plasmas, the period of high-frequency small-amplitude oscillations in the ECE signal during the whole period of anomalous Doppler instability (ADI) is about 2 ms. It is also found that the ADI in ohmic and LHCD discharges can restrain the magnetic oscillations.

引用

页数：5

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