RT Journal Article
T1 Kinetic plasma dynamics in a radial model of a Hall thuster with a curved magnetic field
A1 Marín-Cebrián, Alberto
A1 Domínguez Vázquez, Adrián
A1 Fajardo Peña, Pablo
A1 Ahedo Galilea, Eduardo Antonio
AB A 1D particle-in-cell model of a Hall thruster discharge is used to analyze the effect of a curved magnetic topology in the radial plasma response and the plasma fluxes to dielectric walls. The kinetic solution shows a significant replenishment of the velocity distribution function tail and temperature isotropization for both negative (i.e. anode pointing) and positivecurvatures. The new radial magnetic force is electron confining or expanding for, respectively, negative and positive curvatures, and this modifies significantly the electric and pressure radial forces. As a consequence, the plasma density near the wall and the degree of radial ion defocusing are affected: they are highly reduced for negative curvatures, the case of higher interest. For positive curvatures, the kinetic solution shows that the radial ion flow becomes supersonic within the plasma bulk, away from the Debye sheaths. An ancillary quasineutral fluid model is presented to explain this feature and other aspects of the kinetic solution. Some kinetic studies on additional phenomena complete the work.
PB Elsevier
SN 0963-0252
YR 2022
FD 2022-11-03
LK https://hdl.handle.net/10016/35984
UL https://hdl.handle.net/10016/35984
LA eng
NO This work was funded mainly by the PROMETEO project, funded by the Comunidad de Madrid, under Grant reference Y2018/NMT-4750 PROMETEO-CM. Additional support came from the ESPEOS project, funded by the Agencia Estatal de Investigación (Spanish National Research Agency), under Grant No. PID2019-108034RB-I00/AEI/10.13039/501100011033. The authors acknowledge Dr F Taccogna and coworkers for the development of the original version of the kinetic code used for this work.
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RD 1 sept. 2024