Saturation of the magnetic confinement in weakly ionized plasma

被引：6
|
作者：
Lucken R. [1 ]
Tavant A. [1 ,2 ]
Bourdon A. [1 ]
Lieberman M.A. [3 ]
Chabert P. [1 ]
机构：
[1] LPP, CNRS, École Polytechnique, UPMC Univ Paris 06, Univ. Paris-Sud, Observatoire de Paris, Université Paris-Saclay, Sorbonne Universités, PSL Research University, Palaiseau
[2] Safran Aircraft Engines, Electric Propulsion Unit, Vernon
[3] University of California, Berkeley, 94720, CA
来源：
Plasma Sources Science and Technology | 2020年 / 29卷 / 06期
关键词：
low pressure plasma; Magnetic confinement; magnetized transport; PIC simulation; resistive instability;
D O I：
10.1088/1361-6595/ab38b2
中图分类号：
学科分类号：
摘要：
Plasma transport in magnetized discharges is a long-standing problem because it strongly depends on instabilities whose properties and influence on the plasma transport are difficult to predict. A magnetized plasma column is investigated with 2D particle-in-cell (PIC) simulations in the plane transverse to the magnetic field, at gas pressures between 3 and 12 mTorr and magnetic field intensities between 0 and 40 mT. At high magnetic field, instabilities develop and rotate in the diamagnetic drift direction. It is shown theoretically and by simulation that the magnetic field confinement is destroyed by the instability. Predictive formulas of the main parameters of the instability-enhanced plasma transport such as the edge-to-center plasma density ratio (or h factor), and the effective collision frequency are provided and successfully compared with the PIC simulations. © 2020 IOP Publishing Ltd.
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