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Forces on a spherical conducting particle in e × B fields

机译：e×B场中的球形导电粒子上的力

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摘要

The forces acting on a spherical conducting particle in a transversely flowing magnetized plasma are calculated in the entire range of magnetization and Debye length, using the particle code SCEPTIC3D (Patacchini and Hutchinson 2010 Plasma Phys. Control. Fusion 52 035005, 2011 Plasma Phys. Control. Fusion 53 025005). In short Debye length (i.e. high density) plasmas, both the ion-drag and Lorentz force arising from currents circulating inside the dust show strong components antiparallel to the convective electric field, suggesting that a free dust particle should gyrate faster than what predicted by its Larmor frequency. In intermediate to large Debye length conditions, by a downstream depletion effect already reported in unmagnetized strongly collisional regimes, the ion-drag in the direction of transverse flow can become negative. The internal Lorentz force, however, remains in the flow direction, and large enough in magnitude so that no spontaneous dust motion should occur.
机译：使用粒子代码SCEPTIC3D（Patacchini和Hutchinson 2010 Plasma Phys.Control.Fusion 52 035005，2011 Plasma Phys.Control），在整个磁化和德拜长度范围内计算横向流动的磁化等离子体中作用于球形导电粒子上的力（Fusion 53 025005）。在短德拜长度（即高密度）等离子体中，尘埃内部循环电流产生的离子拖曳力和洛伦兹力均显示出与对流电场反平行的强分量，这表明自由尘埃粒子的旋转速度应比其预期的更快。拉莫尔频率。在中等到较大的德拜长度条件下，由于在未磁化的强烈碰撞状态下已经报告了下游耗尽效应，所以沿横向流动方向的离子拖曳会变为负。但是，内部的洛伦兹力保持在流动方向上，并且其大小足够大，因此不应发生自发的粉尘运动。

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