Ion sound solitary waves with density depressions

R.A. Cairns, R. Bingham, R.O. Dendy, C.M.C. Nairn, P.K. Skukla, A.A. Mamun

Research output: Contribution to journalArticle

Abstract

We show that a non-thermal electron distribution may change the nature of ion acoustic solitons. If the ions are assumed to respond as a fluid to perturbations in the potential, with no significant trapping in a potential well, then a thermal plasma only supports a solitary waves with a density peak. However, with a suitable distribution of non-thermal particles, solitary waves with both density peaks and density depressions may coexist. This may have applications to magnetosperic observations, where solitary structures with lowered densities have been observed in regions where the electron distribution is also seen to be non-thermal.
LanguageEnglish
Pages43-48
Number of pages6
JournalJournal de Physique 4
Volume5
Issue numberC6
DOIs
Publication statusPublished - Oct 1995

Fingerprint

solitary waves
acoustics
electron distribution
ions
thermal plasmas
trapping
perturbation
fluids

Keywords

  • region
  • ion
  • double layers
  • structure
  • plasma
  • density
  • waves
  • electron
  • space
  • ions
  • particles
  • Be

Cite this

Cairns, R. A., Bingham, R., Dendy, R. O., Nairn, C. M. C., Skukla, P. K., & Mamun, A. A. (1995). Ion sound solitary waves with density depressions. Journal de Physique 4 , 5(C6), 43-48. https://doi.org/10.1051/jp4:1995608
Cairns, R.A. ; Bingham, R. ; Dendy, R.O. ; Nairn, C.M.C. ; Skukla, P.K. ; Mamun, A.A. / Ion sound solitary waves with density depressions. In: Journal de Physique 4 . 1995 ; Vol. 5, No. C6. pp. 43-48.
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Cairns, RA, Bingham, R, Dendy, RO, Nairn, CMC, Skukla, PK & Mamun, AA 1995, 'Ion sound solitary waves with density depressions' Journal de Physique 4 , vol. 5, no. C6, pp. 43-48. https://doi.org/10.1051/jp4:1995608

Ion sound solitary waves with density depressions. / Cairns, R.A.; Bingham, R.; Dendy, R.O.; Nairn, C.M.C.; Skukla, P.K.; Mamun, A.A.

In: Journal de Physique 4 , Vol. 5, No. C6, 10.1995, p. 43-48.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Ion sound solitary waves with density depressions

AU - Cairns, R.A.

AU - Bingham, R.

AU - Dendy, R.O.

AU - Nairn, C.M.C.

AU - Skukla, P.K.

AU - Mamun, A.A.

PY - 1995/10

Y1 - 1995/10

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AB - We show that a non-thermal electron distribution may change the nature of ion acoustic solitons. If the ions are assumed to respond as a fluid to perturbations in the potential, with no significant trapping in a potential well, then a thermal plasma only supports a solitary waves with a density peak. However, with a suitable distribution of non-thermal particles, solitary waves with both density peaks and density depressions may coexist. This may have applications to magnetosperic observations, where solitary structures with lowered densities have been observed in regions where the electron distribution is also seen to be non-thermal.

KW - region

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KW - double layers

KW - structure

KW - plasma

KW - density

KW - waves

KW - electron

KW - space

KW - ions

KW - particles

KW - Be

U2 - 10.1051/jp4:1995608

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Cairns RA, Bingham R, Dendy RO, Nairn CMC, Skukla PK, Mamun AA. Ion sound solitary waves with density depressions. Journal de Physique 4 . 1995 Oct;5(C6):43-48. https://doi.org/10.1051/jp4:1995608