Abstract
The Landau damping of waves propagating in a plasma modeled by a Lorentzian (kappa) distribution with a spectral index k is investigated. In the high-frequency range, the dispersion relation of the electron Langmuir wave is obtained. The Landau damping rate equation is shown to have a thermal correction term that has not been found in previous studies. The dispersion relation of ion-acoustic waves is also investigated for the low-frequency range. Dampings of both the electron Langmuir and the ion-acoustic waves are suppressed as the spectral index k increases; i.e., the nonthermal effect decreases.
| Original language | English |
|---|---|
| Pages (from-to) | 1258-1261 |
| Number of pages | 4 |
| Journal | Journal of the Korean Physical Society |
| Volume | 46 |
| Issue number | 5 |
| State | Published - 2005 May 1 |
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Keywords
- Ion-acoustic wave
- Landau damping
- Langmuir wave
- Lorentzian distribution
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Nonthermal effects on the Landau damping in Lorentzian plasmas. / Lee, Myoung-Jae.
In: Journal of the Korean Physical Society, Vol. 46, No. 5, 01.05.2005, p. 1258-1261.Research output: Contribution to journal › Article
TY - JOUR
T1 - Nonthermal effects on the Landau damping in Lorentzian plasmas
AU - Lee, Myoung-Jae
PY - 2005/5/1
Y1 - 2005/5/1
N2 - The Landau damping of waves propagating in a plasma modeled by a Lorentzian (kappa) distribution with a spectral index k is investigated. In the high-frequency range, the dispersion relation of the electron Langmuir wave is obtained. The Landau damping rate equation is shown to have a thermal correction term that has not been found in previous studies. The dispersion relation of ion-acoustic waves is also investigated for the low-frequency range. Dampings of both the electron Langmuir and the ion-acoustic waves are suppressed as the spectral index k increases; i.e., the nonthermal effect decreases.
AB - The Landau damping of waves propagating in a plasma modeled by a Lorentzian (kappa) distribution with a spectral index k is investigated. In the high-frequency range, the dispersion relation of the electron Langmuir wave is obtained. The Landau damping rate equation is shown to have a thermal correction term that has not been found in previous studies. The dispersion relation of ion-acoustic waves is also investigated for the low-frequency range. Dampings of both the electron Langmuir and the ion-acoustic waves are suppressed as the spectral index k increases; i.e., the nonthermal effect decreases.
KW - Ion-acoustic wave
KW - Landau damping
KW - Langmuir wave
KW - Lorentzian distribution
UR - http://www.scopus.com/inward/record.url?scp=19944423407&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:19944423407
VL - 46
SP - 1258
EP - 1261
JO - Journal of the Korean Physical Society
JF - Journal of the Korean Physical Society
SN - 0374-4884
IS - 5
ER -