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论文类型：期刊论文

发表时间：1997-01-01

发表刊物：Wuli Xuebao/Acta Physica Sinica

收录刊物：Scopus、PKU

卷号：46

期号：8

页面范围：1533-1534

ISSN号：10003290

摘要：The helical instability of an arc column with electrical conductivity of the parabolic distribution and transparent radiation of the parabolic distribution is discussed in axial magnetic field. The magnetonydrodynamic equations serve as the strarting point of the theory. In an electrostatic approximation and a linear time dependent perturbation theory, the perturbation equations for the arc column movement are deduced. Solutions of these equations are obtained analytically, from which the stability limit of the cylindrical arc and the growth rate of the helical instability are given. In comparision the results with those of current distribution without radiation, it is found that the radiation in the small middle arc increases the instability.