Simulation studies on stability of EBT

Journal Article · Fri Jun 01 04:00:00 EDT 1984 · Phys. Fluids; (United States)

DOI:https://doi.org/10.1063/1.864772· OSTI ID:6745390

Ohsawa, Y; Dawson, J M

Stability and beta limits of the ELMO Bumpy Torus (EBT) are studied by using a 2 1/2 -D fully relativistic, electromagnetic particle code. A slab model is used which is bounded in the x direction (corresponding to the radial direction) and which is periodic in the y direction (corresponding to the poloidal direction). The imposed magnetic field is in the z direction (the ignorable coordinate) and is a function of x so that the plasma flutes in the absence of an EBT ring. The hot electron ring (layer) is shown to be effective in suppressing the Rayleigh--Taylor instability, when k/sub y/rho/sub h/ > or approx. =1, where rho/sub h/ is the Larmor radius of hot electrons. However, in a system where k/sub y/rho/sub h/ <1 for long wavelength modes, the plasma exhibits instability. One possible mode which agrees fairly well with our observations is the low-frequency hot electron interchange instability.

• Research Organization: Department of Physics, University of California, Los Angeles, California 90024
• DOE Contract Number: AM03-76SF00010
• OSTI ID: 6745390
• Journal Information: Phys. Fluids; (United States), Journal Name: Phys. Fluids; (United States) Vol. 27:6; ISSN PFLDA
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700107* -- Fusion Energy-- Plasma Research-- Instabilities
BETA RATIO
BUMPY TORI
ELMO BUMPY TORUS
ELMO DEVICES
HOT PLASMA
INSTABILITY
LARMOR RADIUS
MAGNETIC MIRRORS
OPEN PLASMA DEVICES
PLASMA
PLASMA INSTABILITY
PLASMA SIMULATION
RELATIVISTIC PLASMA
SIMULATION
STABILITY
THERMONUCLEAR DEVICES