Weibel instability with non-Maxwellian distribution functions
- Salam Chair in Physics, Department of Physics, G. C. University Lahore, Punjab 54000 (Pakistan)
The Weibel instability in an unmagnetized plasma is investigated for non-Maxwellian distribution functions. In particular, analytical expressions are derived for the real and imaginary parts of the dielectric constant for the Maxwellian, kappa ({kappa}), and (r,q) distribution functions under the conditions of {xi}={omega}/k{sub parallel}{theta}{sub parallel}>>1 and <<1. The real frequency and the growth rate of the instability now depend upon the values of the spectral indices of the distribution functions. In general, the growth rate is suppressed for small values of {kappa} and q (keeping r fixed) and for negative values of r (keeping q fixed) instability transforms into damping. In the limiting cases (i) {kappa}{yields}{infinity} and (ii) r=0, q{yields}{infinity}, the results approach to the Maxwellian situation.
- OSTI ID:
- 20974823
- Journal Information:
- Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 2 Vol. 14; ISSN PHPAEN; ISSN 1070-664X
- Country of Publication:
- United States
- Language:
- English
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