Počet záznamů: 1
Electron energy distribution function in a low-power Hall thruster discharge and near-field plume
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SYSNO ASEP 0491731 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Electron energy distribution function in a low-power Hall thruster discharge and near-field plume Tvůrce(i) Tichý, M. (CZ)
Petin, A. (FR)
Kudrna, P. (CZ)
Horký, Miroslav (UFA-U) ORCID
Mazouffre, S. (FR)Celkový počet autorů 5 Číslo článku 061205 Zdroj.dok. Physics of Plasmas - ISSN 1070-664X
Roč. 25, č. 6 (2018)Poč.str. 10 s. Forma vydání Tištěná - P Jazyk dok. eng - angličtina Země vyd. US - Spojené státy americké Klíč. slova stationary plasma thrusters ; langmuir probe ; positive-ions ; simulations ; propulsion Vědní obor RIV BL - Fyzika plazmatu a výboje v plynech Obor OECD Fluids and plasma physics (including surface physics) Institucionální podpora UFA-U - RVO:68378289 UT WOS 000437193700010 EID SCOPUS 85047256746 DOI 10.1063/1.5017578 Anotace Electron temperature and plasma density, as well as the electron energy distribution function (EEDF), have been obtained inside and outside the dielectric channel of a 200W permanent magnet Hall thruster. Measurements were carried out by means of a cylindrical Langmuir probe mounted onto a compact fast moving translation stage. The 3D particle-in cell numerical simulations complement experiments. The model accounts for the crossed electric and magnetic field configuration in a weakly collisional regime where only electrons are magnetized. Since only the electron dynamics is of interest in this study, an artificial mass of ions corresponding to m(i) = 30 000m(e) was used to ensure ions could be assumed at rest. The simulation domain is located at the thruster exit plane and does not include the cathode. The measured EEDF evidences a high-energy electron population that is superimposed onto the low energy bulk population outside the channel. Inside the channel, the EEDF is close to Maxwellian. Both the experimental and numerical EEDF depart from an equilibrium distribution at the channel exit plane, a region of high magnetic field. We therefore conclude that the fast electron group found in the experiment corresponds to the electrons emitted by the external cathode that reach the thruster discharge without experiencing collision events. Published by AIP Pracoviště Ústav fyziky atmosféry Kontakt Kateřina Adamovičová, adamovicova@ufa.cas.cz, Tel.: 272 016 012 ; Kateřina Potužníková, kaca@ufa.cas.cz, Tel.: 272 016 019 Rok sběru 2019
Počet záznamů: 1