Nonlinear saturation of ballooning modes in tokamaks and stellarators

Journal Article · Sat Oct 01 00:00:00 EDT 1988 · Proceedings of the National Academy of Sciences of the United States of America; (USA)

DOI:https://doi.org/10.1073/pnas.85.20.7423· OSTI ID:5540846

Bauer, F; Garabedian, P; Betancourt, O ^[1]

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1. New York Univ., NY (USA)

The spectral code BETAS computes plasma equilibrium in a toroidal magnetic field B = {nabla}s {times} {nabla}{psi} with remarkable accuracy because the finite difference scheme employed in the radial direction allows for discontinuities of the flux function {psi} across the nested surfaces s = const. Instability of higher modes in stellarators like the Heliotron E can be detected in roughly an hour on the best supercomputers by calculating bifurcated equilibria that are defined over just one field period. The method has been validated by comparing results about nonlinear saturation of ballooning modes in tokamaks with numerical data from the PEST code.

• DOE Contract Number: FG02-86ER53223
• OSTI ID: 5540846
• Journal Information: Proceedings of the National Academy of Sciences of the United States of America; (USA), Vol. 85:20; ISSN 0027-8424
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
STELLARATORS
MAGNETOHYDRODYNAMICS
TOKAMAK DEVICES
BALLOONING INSTABILITY
MHD EQUILIBRIUM
PLASMA INSTABILITY
SPECTRAL FUNCTIONS
CLOSED PLASMA DEVICES
EQUILIBRIUM
FLUID MECHANICS
FUNCTIONS
HYDRODYNAMICS
INSTABILITY
MECHANICS
PLASMA MACROINSTABILITIES
THERMONUCLEAR DEVICES
640430* - Fluid Physics- Magnetohydrodynamics