Beta limit in tokamaks. Experimental and computational status
- 1 October 1988
- journal article
- Published by IOP Publishing in Plasma Physics and Controlled Fusion
- Vol. 30 (11) , 1597-1609
- https://doi.org/10.1088/0741-3335/30/11/019
Abstract
Experimental data obtained in Tokamaks heated by NBI or ECRH provides increasing evidence for a beta limit given by beta (%) =gI(MA)/a(m)B(T) with g approximately=2.5-3.5. Steady-state operation at about 80% of this limit appears possible. Ideal MHD numerical optimisations suggest that higher values are possible with optimised current profiles in circular plasmas, approaching at low current the value calculated analytically by Wesson and Sykes (1985). At elongations around 2 there is evidence of a change in the scaling law giving beta in terms of the current in the region of low q.Keywords
This publication has 9 references indexed in Scilit:
- Ideal MHD stability properties of pressure driven modes in low shear tokamaksNuclear Fusion, 1987
- Finite beta effects on tearing modes in the tokamakNuclear Fusion, 1987
- Resistive ballooning modes and the second region of stabilityPlasma Physics and Controlled Fusion, 1987
- β Limits in H-mode-like dischargesJournal of Computational Physics, 1986
- Accessibility of second regions of stability in tokamaksJournal of Computational Physics, 1986
- Ballooning beta limits of Dee- and bean-shaped tokamaksNuclear Fusion, 1985
- Beta limits for the BIG DEENuclear Fusion, 1985
- Tokamak beta limitNuclear Fusion, 1985
- Stability of high-beta tokamaks to ballooning modesNuclear Fusion, 1980