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Very-near-field plume simulation of a stationary plasma thruster

Published online by Cambridge University Press:  25 June 2004

F. Taccogna
Affiliation:
Dipartimento di Chimica dell'Università degli Studi di Bari and IMIP-CNR, Sect. Bari, via Orabona 4, 70126 Bari, Italy
S. Longo
Affiliation:
Dipartimento di Chimica dell'Università degli Studi di Bari and IMIP-CNR, Sect. Bari, via Orabona 4, 70126 Bari, Italy
M. Capitelli
Affiliation:
Dipartimento di Chimica dell'Università degli Studi di Bari and IMIP-CNR, Sect. Bari, via Orabona 4, 70126 Bari, Italy
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Abstract

The plasmadynamics of a stationary plasma thruster (SPT-100) plume in the very-near-field region have been studied by using a two-dimensional axisymmetric numerical code based on a combination of Particle-in-Cell (PIC) simulation for ion component (Xe+ and Xe++) and fluid description for electrons. In particular we have solved the electron momentum conservation equation (including collisional and magnetic effects) and the electron energy conservation equation (including collisional effects). Due to the difference between electron and ion Larmor radius and to the effect of the thruster wall, the quasi-neutrality hypothesis can be violated in the very-near-field plume region and the electric field must be computed accordingly. The xenon atom flowfield is calculated analytically. The model allows a unitary rationalization of several experimental observations.

Keywords

Type
Research Article
Copyright
© EDP Sciences, 2004

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References

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