摘要
软X射线的锯齿振荡,在ST,Pulsator和TEXT等装置上已观测到;在Pulsator和PLT上已研究了硬X射线锯齿波。PLT和Pulsator观测结果为,产生的硬X射线锯齿振荡为反锯齿和内破裂的软X射线锯齿相对应。Pulsator的硬X射线锯齿和软X射线锯齿一样,这种趋势一直持继到放电结束,而硬X射线峰值发生在软X射线内破裂后大约200μs。PLT的硬X射线锯齿比软X射线锯齿延迟1至5ms。本工作目的是在内破裂后,从软、硬X射线锯齿波对比,观测硬X射线到达峰值这段延迟时间,并以此来量度逃逸电子约束时间。
Hard X-ray sawteeth detected from the limiter of the HL-1 tokamak are inverted ones,with periods increasing linearly with electron density,which might result from the transport of runaway electrons from q=1nearby surface to the limiter.The sawtooth rise time is around 0.3ms whichapproximates to the transport time of runaway electrons.Sometimes the period and amplitude of the sawteeth decrease a little with the growing of magnetic perturbation modes m=2 and m=3,while the intensity of.the hard X-ray increases.In most instances,no obvious coupling between the hard X-ray sawteeth and the MHD model is observed.
出处
《核聚变与等离子体物理》
CAS
CSCD
北大核心
1990年第2期120-123,共4页
Nuclear Fusion and Plasma Physics
关键词
HL-1装置
X射线
振荡
托卡马克装置
Hard X-ray sawtooth oscillation,Transport time, Magnetic island,m-mode activities.
