20.500.12556/RUL-156109 One-dimensional, multi-fluid model of the plasma wall transition. I. Hot electrons The plasma-wall transition in a plasma containing singly charged positive ions and two groups of electrons is studied with a one-dimensional steady-state multifluid model, which is presented in some detail. When the temperature and the initial density ratio between the two groups of electrons are varied, a transition between the two types of solutions to the model equations is observed. When the density and temperature of the hot electrons are above certain critical values, a high solution is observed. If the ion mass is decreased, these critical values increase. However, this effect only occurs with artificially small ion masses, which are significantly lower than the proton mass. In the high solution, the potential drop is determined by the hot electrons and is greater in absolute terms than in the low solution, where it is determined by the base electron population. The transition between the low and high solutions is very sharp if a neutrality condition is imposed. However, if the neutrality condition is replaced by the Poisson equation, the transition becomes blurred and the solutions exhibit oscillations. The temperature profiles of the ions are analyzed, and it is confirmed that the ion sound and the ion fluid velocity become equal at the breaking point of the plasma neutrality. It is shown how the ion source term, the initial ion velocity, and the initial electric field are found to be self-consistent. The density profiles of the negatively biased particles resulting from the fluid equations deviate very little those of from the Boltzmann-distributed particles, even if the corresponding source terms are quite large. plasma sheath Bohm criterion temeperature electron distribution plazma plašč Bohmov kriterij dvotemperaturna elektronska porazdelitev true false true Angleški jezik Slovenski jezik Članek v reviji 2024-05-08 14:28:53 2024-05-08 14:28:59 2025-11-11 09:00:02 0000-00-00 00:00:00 2024 0 0 22 str. iss. 4, art. 045201 Vol. 14 Apr. 2024 0000-00-00 Zaloznikova Objavljeno apc 0000-00-00 0000-00-00 0000-00-00 533 2158-3226 10.1063/5.0200376 191198211 045201_1_5.0200376.pdf 045201_1_5.0200376.pdf 1 18B7F05079F491F9E42C66E73CA5E5AD 71038c548664428d4ef284034cb883ff35a5073d61d4165d152dd76616961e85 d7f83584-0d37-11ef-a389-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=183357 https://pubs.aip.org/aip/adv/article/14/4/045201/3280401/One-dimensional-multi-fluid-model-of-the-plasma 1 8e3f6ece-0d36-11ef-a389-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=183356 Fakulteta za elektrotehniko Fakulteta za strojništvo Fakulteta za matematiko in fiziko 0 0 0