Study of the stability of the Elmo Bumpy Torus (EBT) fusion device

Thesis/Dissertation · Sat Jan 01 04:00:00 EST 1983

OSTI ID:5918277

Nguyen, K T

Several problems associated with the stability of the ELMO Bumpy Torus (EBT) are investigated. The role of the hot electron distribution function in the stability of the EBT is investigated 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 electron is large, while the compressional Alfven mode reflects dependence on the distribution function. It is also demonstrated that in the deep-well case the results for both modes are independent of the model and of the distribution function. The macroscopic stability of a model EBT plasma taking into account variations along the field lines is numerically investigated in the long-thin limit. When the hot electron compression term has a pole in the ring region, the background ballooning mode becomes stable for any value of the hot electron ..beta.. due to strong line bending that results from the interaction of the hot electron component with the plasma.

• Research Organization: Michigan Univ., Ann Arbor (USA)
• OSTI ID: 5918277
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700107* -- Fusion Energy-- Plasma Research-- Instabilities
ALFVEN WAVES
BALLOONING INSTABILITY
BUMPY TORI
DISTRIBUTION FUNCTIONS
ELECTRONS
ELEMENTARY PARTICLES
ELMO BUMPY TORUS
ELMO DEVICES
FERMIONS
FUNCTIONS
HYDROMAGNETIC WAVES
INSTABILITY
LEPTONS
MAGNETIC MIRRORS
OPEN PLASMA DEVICES
PLASMA INSTABILITY
PLASMA MACROINSTABILITIES
STABILITY
THERMONUCLEAR DEVICES