Role of the hot-electron distribution function in the stability of the ELMO Bumpy Torus

Journal Article · Sat Oct 01 04:00:00 EDT 1983 · Phys. Fluids; (United States)

DOI:https://doi.org/10.1063/1.864033· OSTI ID:5464291

Nguyen, K; Kammash, T

Several recent studies of ELMO Bumpy Torus (EBT) stability show that conflicting results can emerge when different distribution functions for the hot-electron component are used. In this paper the role of the distribution function is established by examining the stability of various modes with the aid of two models. In the ''slab'' model where the magnetic field curvature is simulated by a gravitational force it is shown that the stability of the compressional Alfven wave is insensitive to the distribution function while the interacting interchange mode is sensitive. In the ''local'' approximation in which the curvature effects enter in a natural way it is seen that the interchange modes are insensitive so long as the anisotropy of the hot electrons is large, while other modes reflect dependence on the distribution function. Finally it is demonstrated that in the ''deep well' case the results for both modes are independent of the model and of the distribution function.

• Research Organization: The University of Michigan, Ann Arbor, Michigan 48109
• OSTI ID: 5464291
• Journal Information: Phys. Fluids; (United States), Journal Name: Phys. Fluids; (United States) Vol. 26:10; ISSN PFLDA
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700105 -- Fusion Energy-- Plasma Research-- Plasma Kinetics-Theoretical-- (-1987)
700107* -- Fusion Energy-- Plasma Research-- Instabilities
700108 -- Fusion Energy-- Plasma Research-- Wave Phenomena
ANISOTROPY
DISTRIBUTION FUNCTIONS
ELMO BUMPY TORUS
ELMO DEVICES
FLUTE INSTABILITY
FUNCTIONS
HOT PLASMA
INSTABILITY
MAGNETIC MIRRORS
OPEN PLASMA DEVICES
PLASMA
PLASMA INSTABILITY
PLASMA MACROINSTABILITIES
PLASMA WAVES
THERMONUCLEAR DEVICES