An Eulerian Vlasov code for plasma-wall interactions

Joint Varenna-Lausanne International Workshop 2014

Coulette, David^1 ; Manfredi, Giovanni^1

Institut de Physique et Chimie des Matériaux de Strasbourg, CNRS, Université de Strasbourg, 23 rue du Loess, Strasbourg

F-67034, France^1

关键词: Eulerian Vlasov codes;    Plasma wall interaction;    Presheath structures;    Source-sink terms;    Stationary solutions;    Tilted magnetic fields;    Uniform magnetic fields;    Vlasov-Poisson systems;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/561/1/012005/pdf
DOI  :  10.1088/1742-6596/561/1/012005

来源: IOP

【 摘 要 】

In this work we present a new Eulerian kinetic 1D3V code devoted to the study of plasma-wall interactions and sheath structure. The code solves the Vlasov-Poisson system for two or more kinetic species on a one-dimensional spatial grid between two limiting plates, in the presence of a uniform magnetic field tilted with respect to the normal to the plates. A source-sink term in the Vlasov equation leads to a stationary solution comprising a magnetic and a collisional presheath, as well as the usual Debye sheath in front of the wall. Thanks to a nonuniform spatial grid the sheath structure can be resolved accurately. Several advection schemes are implemented and the code is parallelized. Here, the code is used to illustrate the problems of a stationary sheath-presheath structure in front of a negatively biased wall, with and without a tilted magnetic field.