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首页> 外文期刊>Plasma and Fusion Research >Effect of Magnetic Field Curvature on Penetration of the Magnetic Field into the Plasma
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Effect of Magnetic Field Curvature on Penetration of the Magnetic Field into the Plasma

机译：磁场曲率对磁场渗入等离子体的影响

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The penetration of a magnetic field into a cylindrical plasma, in the time scale that is much longer than electron cyclotron period, is studied. A linear wave analysis is shown that the magnetic field penetrates rapidly into the plasma in radii smaller than the ion skin depth. Due to the axial symmetry, the problem reduces to a two-dimensional problem. The magnetic field evolution is numerically calculated. The ion density is also calculated. It is shown that during the penetration of the magnetic field, a gap appears between cathode and plasma. At the early times, at the plasma boundary, electrons move radially, and coupling of the electron velocity and the electric field induces the magnetic field. Electrons then gain a drift due to the field curvature that results in fast penetration of the magnetic field into the plasma.
机译：研究了在比电子回旋加速器周期长得多的时间范围内磁场渗透到圆柱形等离子体中的过程。线性波分析显示，磁场以小于离子趋肤深度的半径迅速渗透到等离子体中。由于轴向对称，该问题简化为二维问题。磁场演化是通过数值计算的。还计算离子密度。结果表明，在磁场穿透过程中，在阴极和等离子体之间出现了间隙。在早期，在等离子体边界处，电子径向移动，并且电子速度和电场的耦合感应出磁场。然后，电子由于场曲而获得漂移，从而导致磁场快速渗透到等离子体中。

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