Journal article
The expansion of a collisionless plasma into a plasma of lower density
- Abstract:
- This paper considers the asymptotic and numerical solution of a simple model for the expansion of a collisionless plasma into a plasma of lower density. The dependence on the density ratio of qualitative and quantitative features of solutions of the well-known cold-ion model is explored. In the cold-ion limit, we find that a singularity develops in the ion density in finite time unless the density ratio is zero or close to unity. The classical cold-ion model may cease to be valid when such a singularity occurs and we then regularize the model by the finite ion-temperature Vlasov-Poisson system. Numerical evidence suggests the emergence of a multi-modal velocity distribution.
- Publication status:
- Published
- Peer review status:
- Peer reviewed
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(Preview, Version of record, pdf, 11.4MB, Terms of use)
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- Publisher copy:
- 10.1063/1.4802933
Authors
- Publisher:
- American Institute of Physics
- Journal:
- Physics of Plasmas More from this journal
- Volume:
- 20
- Issue:
- 5
- Pages:
- 052101-052101
- Publication date:
- 2013-05-01
- DOI:
- EISSN:
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1089-7674
- ISSN:
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1070-664X
- Pubs id:
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pubs:410011
- UUID:
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uuid:e0c4ffe1-008f-4341-a6e3-4f82c12ea713
- Local pid:
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pubs:410011
- Source identifiers:
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410011
- Deposit date:
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2013-11-16
- ARK identifier:
Terms of use
- Copyright holder:
- AIP Publishing LLC
- Copyright date:
- 2013
- Notes:
- Copyright © 2013 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in Perego, M., Howell, P. D., Gunzburger, M. D., Ockendon, J. R., and Allen, J. E. (2013). The expansion of a collisionless plasma into a plasma of lower density. Physics of Plasmas. AIP Publishing. and may be found at http://doi.org/10.1063/1.4802933.
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