Hot electron stabilization of a helically symmetric plasma
Furth and Boozer (private communication; Proceedings of the Advanced Bumpy Torus Concepts Workshop, CONF-830758, Oak Ridge National Laboratory, Oak Ridge, Tennessee, 1983, p. 161) have suggested the use of relativistic electrons to achieve the second stability regime in a helical axis stellarator (Heliac). The hot electrons would only be required until the background plasma reached the second stability regime; the heating power maintaining the hot electron layer would then be turned off. The basic correctness of Furth and Boozer's suggestion is confirmed numerically by a localized stability analysis of helically symmetric plasma equilibria, with anisotropic pressure profiles. Stability is evaluated using the localized interchange criterion in which the hot electrons, because of their large drift speeds, are treated as rigid. A hot electron pressure profile is exhibited; it provides a stable path to the second stability regime for the background plasma.
- Research Organization:
- AMPC, Inc., 2210-P Encinitas Boulevard, Encinitas, California 92024
- DOE Contract Number:
- AC03-83ER80102
- OSTI ID:
- 5922262
- Journal Information:
- Phys. Fluids; (United States), Journal Name: Phys. Fluids; (United States) Vol. 29:4; ISSN PFLDA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
700101* -- Fusion Energy-- Plasma Research-- Confinement
Heating
& Production
CLOSED PLASMA DEVICES
CONFIGURATION
ELECTRON DRIFT
EQUILIBRIUM
HELICAL CONFIGURATION
HOT PLASMA
NUMERICAL SOLUTION
PLASMA
PLASMA PRESSURE
STABILIZATION
STELLARATORS
THERMONUCLEAR DEVICES
VELOCITY