Exact current to a spherical electrode in a collisionless, large‐Debye‐length magnetoplasma
Exact current to a spherical electrode in a collisionless, large‐Debye‐length magnetoplasma
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无碰撞、大德拜长度磁等离子体中球形电极的精确电流
DOI：
10.1063/1.859619
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发表时间：
1991
期刊：
影响因子：
--
通讯作者：
J. G. Laframboise
中科院分区：
文献类型：
--
作者：
L. J. Sonmor;J. G. Laframboise
给出了在一定的无因次电极电势和磁场强度范围内，无碰撞麦克斯韦等离子体在均匀磁场中，由球形完美吸收电极产生的稳态电流的精确计算。这些计算在大的德拜长度范围内是有效的。结果与Rubinstein和Laframboise的理论进行了比较，后者给出了吸引物种流和排斥物种流的上下界。结果表明，在磁场强度一定的情况下，当电极电势从空间电势增加时，电子(即被吸引物种)电流减小，但没有绝热极限(有效下限)电流减小的速度快。离子流也立即从绝热极限电流发散。随着电极电势的进一步增加，电子电流单调上升并朝着正则上界运动，这是著名的Parker和...
Exact calculations of the steady‐state current drawn from a collisionless, Maxwellian plasma in a uniform magnetic field by a spherical, perfectly absorbing electrode are presented for a range of dimensionless electrode potentials and magnetic‐field strengths. These calculations are valid in the limit of large Debye length. The results are compared with the theory of Rubinstein and Laframboise, which gives upper and lower bounds for both the attracted‐species and the repelled‐species current. It is found that as the electrode potential increases from space potential with magnetic‐field strength fixed, the electron (i.e., attracted‐species) current decreases, but not as quickly as the adiabatic‐limit (effectively lower‐bound) current. The ion current also diverges immediately from the adiabatic‐limit current. As the electrode potential increases further, the electron current rises and moves monotonically toward the canonical upper bound, which is the warm‐plasma generalization of the well‐known Parker and ...