Modelling the plasma-sheath boundary for plasmas with warm-ion sources
Kos, Leon (Author), Duhovnik, Jože (Author), Jelić, Nikola (Author)

URLURL - Presentation file, Visit http://www.lecad.uni-lj.si/~leon/research/ppgplasma/807.pdf This link opens in a new window

In this paper we present a new approach how to solve the plasma equation for the case of Maxwellian ion source of a finite-temperature distribution. This problem is an old one which assumes solving an integral equation of Fredholm or, alternatively, Volterra type with a particular bell-shaped kernel. Due to mathematical difficulties with such physically very important kernel choice its shape was in the past approximated in several ways yielding approximate numerical solutions. Unfortunately, these solutions are valid only in limited ranges of ion temperature. In our approach we work with exact kernel, so we are capable to obtain the results which are, in principle, of arbitrary precision in an arbitrary range of the ion source temperatures. Precise solution of plasma-equation with finite temperature ion-source is extremely important in determining the plasma parameters for determining the plasma sheath boundary. In this paper we obtain the ion velocity distribution at arbitrary point in a planeparallel discharge, which enable ones to calculate its moments (density, temperature and higher order moments) also at the edge of the system, where boundary conditions for a discharge should be known with a high degree of accuracy. We present here our results obtained both with PIC simulation and analytic-numerical method.

Keywords:fizika plazme, plazemski plašč, PIC simulacija, analitično-numerične metode, plazemske enačbe, elektronske temperature, vroči elektroni
Work type:Not categorized (r6)
Tipology:1.08 - Published Scientific Conference Contribution
Organization:FS - Faculty of Mechanical Engineering
Number of pages:8 str.
COBISS.SI-ID:10865691 Link is opened in a new window
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