| Presentation: | submitted: | by: |
|---|---|---|
| mlazar_paper.pdf | 2007-03-28 15:50:51 | Marian Lazar |
Cumulative effect of the filamentation and Weibel instabilities
Author: Marian Lazar
Requested Type: Consider for Invited
Submitted: 2006-12-17 17:52:24
Co-authors: R. Schlickeiser, P.K. Shukla
Contact Info:
Theoretical Physics
# 119 - 22 Elkhorn Dr.
Toronto, ON, M2K 1J 1
Canada
Abstract Text:
All beam plasma instabilities are dissipative, preventing the beam energy deposition. Kinetic effects arising from the perpendicular temperature of the beam or surrounding plasma could stabilize the nonresonant filamentation mode. But such beam plasma systems combine streaming and thermal anisotropic structures where the both filamentation and Weibel instabilities develop, and only clarifying the frequent confusion between these instabilities will improve the control of fusion plasma experiments. When a positive bi-Maxwellian thermal anisotropy is assumed, the two transverse instabilities, filamentation and Weibel, are emitted on the same direction and interact to yield larger growth rates. Otherwise, the destabilizing effect of the filamentation instability can be considerably reduced by supplementing with a negative thermal anisotropy. In this case, the Weibel instability arises along the streaming direction with a self-focusing contribution, and the filamentation instability is significantly delayed and suppressed.
Characterization: A3
Comments:
A3, B5, E1, E5
