Gyrokinetic linear theory of the entropy mode in a Z pinch
- Department of Physics and Astronomy, Dartmouth College, Hanover, New Hampshire 03755 (United States)
The linear gyrokinetic theory of the entropy mode is presented in a Z-pinch configuration in the regime of plasma {beta}<<1, focusing primarily on the parameter regime in which the ideal interchange mode is stable. The entropy mode is a small-scale, nonmagnetohydrodynamic mode that typically has peak growth rates at k{rho}{sub s}{approx}1[{rho}{sub s}{sup 2}=(T{sub 0e}+T{sub 0i})/(m{sub i}{omega}{sub ci}{sup 2})], with magnitudes comparable to those of ideal modes. The properties of this mode are studied as a function of the density and temperature gradients, plasma collisionality, and electron to ion temperature ratio.
- OSTI ID:
- 20787338
- Journal Information:
- Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 6 Vol. 13; ISSN PHPAEN; ISSN 1070-664X
- Country of Publication:
- United States
- Language:
- English
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