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International Journal for Multiscale Computational Engineering
Facteur d'impact: 1.016 Facteur d'impact sur 5 ans: 1.194 SJR: 0.554 SNIP: 0.82 CiteScore™: 2

ISSN Imprimer: 1543-1649
ISSN En ligne: 1940-4352

International Journal for Multiscale Computational Engineering

DOI: 10.1615/IntJMultCompEng.v4.i2.50
pages 243-254

Multiscale Simulation of Hall Discharge

Francesco Taccogna
Dipartimento di Chimica dell'Universitá di Bari, via Orabona 4, 70126 Bari, Italy
Savino Longo
Dipartimento di Chimica dell'Universitá di Bari, and IMIP/CNR, Via Orabona 4, 70126 Bari, Italy
Mario Capitelli
Dipartimento di Chimica, Universita di Bari, via Orabona n. 4, 70126 Bari, Italy; IMIP-CNR, sect Bari, via Orabona n. 4, 70126 Ban, Italy
Ralf Schneider
Max Planck Institute für Plasmaphysik, Wendelsteinstr. 1, D-17491 Greifswald, Germany

RÉSUMÉ

Non-Maxwellian behavior and plasma-wall interaction are key processes in the physics of Hall thrusters. For this purpose, a 2D{r,z}-3V axisymmetric fully kinetic particle-in-cell/Monte Carlo collision (PIC-MCC) model of the acceleration channel including the process of secondary electron emission (SEE) from the dielectric walls has been developed. In order to make the simulation possible with regard to the computational time due to the different electron and neutral time scale, a reduction of the thruster dimension was done. This was derived from a new physics-based scaling law. This model has demonstrated its outstanding capability in improving the physics insight into the processes in a stationary plasma thruster (SPT) and in reproducing experimental data accurately.


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