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arXiv 1208.2248physics.plasm-phphysics.comp-ph
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磁化和非磁化射频放电鞘层后离子能量分布函数

Ion energy distribution functions behind the sheaths of magnetized and non magnetized radio frequency discharges

Jan Trieschmann, Mohammed Shihab, Daniel Szeremley, Abd Elfattah Elgendy, Sara Gallian, Denis Eremin, Ralf Peter Brinkmann, Thomas Mussenbrock

摘要:

研究了磁场对电容耦合射频放电特性的影响,发现磁场的影响是显著的。一维粒子模拟表明,几何对称放电可以通过施加空间不均匀的磁场来不对称化。这种效应类似于最近发现的电不对称效应。这两种效应都是独立作用的,它们可以在同一方向上起作用,也可以相互补偿。电极处的离子能量分布函数也受到磁场的强烈影响,尽管只是间接影响。场不影响护套本身的动力学,而是影响其操作条件,即,通过它的离子通量和电压降。为了支持这一解释,粒子在细胞的结果与最近提出的时空算法的结果进行了比较。虽然该方案只解决鞘层和忽略磁化,它是能够再现离子能量分布函数具有非常好的精度,无论是否放电磁化或不。

英文摘要:

The effect of a magnetic field on the characteristics of capacitively coupled radio frequency discharges is investigated and found to be substantial. A one-dimensional particle-in-cell simulation shows that geometrically symmetric discharges can be asymmetrized by applying a spatially inhomogeneous magnetic field. This effect is similar to the recently discovered electrical asymmetry effect. Both effects act independently, they can work in the same direction or compensate each other. Also the ion energy distribution functions at the electrodes are strongly affected by the magnetic field, although only indirectly. The field influences not the dynamics of the sheath itself but rather its operating conditions, i.e., the ion flux through it and voltage drop across it. To support this interpretation, the particle-in-cell results are compared with the outcome of the recently proposed ensemble-in-spacetime algorithm. Although that scheme resolves only the sheath and neglects magnetization, it is able to reproduce the ion energy distribution functions with very good accuracy, regardless of whether the discharge is magnetized or not.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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