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物理学报. 1980, 174(3): 311-319.
doi: 10.7498/aps.29.311.
磁化等离子体中逃逸电子的临界速度
- 收稿日期: 1979-01-24
- 刊出日期: 2005-07-29
摘要: 根据等离子体动力论,分析了在磁化等离子体中逃逸电子的临界速度,并在托卡马克参数下作了数值计算。计算表明,有磁场时,逃逸电子所受到的摩擦力,在纵向速度较大时比无磁场时的为大,这相应于逃逸电子临界速度的提高,因而高能的逃逸电子也较难产生。当磁场增大时,摩擦力略有减小。在纵向速度较高时,逃逸电子的横向速度分量对临界速度的影响较明显,横向速度越大,临界速度也越大。
English Abstract
THE CRITICAL VELOCITY OF RUNAWAY ELECTRONS IN A MAGNETIZED PLASMA
- Received Date:
24 January 1979
- Published Online:
29 July 2005
Abstract: The critical velocity of runaway electrons in a magnetized plasma is investigated from a kinetic theoretical approach. The results of numerical calculation are obtained for the parameter regions of tokamaks. The frictional force along the magnetic field encountered by the higher velocity runaway electrons is greater than that in a field free plasma. This means a higher critical velocity in a magnetized plasma. For an electron with large longitudinal velocity, the transverse velocity enhances the dynamic friction. This gives rise to the results of a higher critical velocity for the electrons with larger transverse velocity.
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