Kinetic Investigation of Ideal Multipole Resonance Probe
Junbo Gong, Sebastian Wilczek, Jens Oberrath, Denis Eremin, Michael Friedrichs, Ralf Peter Brinkmann
DPG Frühjahrstagung 2017, Bremen, Germany, 13 March - 17 March
Active Plasma Resonance Spectroscopy (APRS) denotes a class of industry-compatible plasma diagnostic methods which utilize the natural ability of plasmas to resonate on or near the electron plasma frequency. One particular realization of APRS with a high degree of geometric and electric symmetry is Multipole Resonance Probe (MRP). The Ideal MRP (IMRP) is an even more symmetric idealization which is suited for theoretical investigations. In this work, a spectral kinetic scheme is presented to investigate the behavior of the IMRP in the low pressure regime. The scheme consists of two modules, the particles pusher and the field solver. However, due to the velocity difference, the electrons are treated as particles whereas the ions are only considered as stationary background. The particle pusher integrates the equations of motion for the studied particles. The Poisson solver determines the electric field at each particle position. The proposed method overcomes the limitation of the cold plasma model and covers kinetic effects like collisionless damping.