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Abstract

Under the conditions of so far performed quasi-steady stellarator experiments at maximum achievable plasma density, the plasma pressure gradient in the outer layers of the plasma body becomes mainly determined by the plasma - neutral gas balance. Ballooning instabilities can be driven by this gradient in regions of "bad" magnetic field curvature, when the average plasma density exceeds a critical limit. The latter becomes proportional to B-t*/A**1/4R**1/2 where B-t is the toroidal magnetic field strength, * is the rotational transform, A is the mass number, and R the major radius. The limit thus predicted appears to be consistent with experiments performed up to the present date

Additional information

Authors: LEHNERT B ROYAL INSTITUTE OF TECHNOLOGY, STOCKHOLM (SWEDEN), ROYAL INSTITUTE OF TECHNOLOGY, STOCKHOLM (SWEDEN)
Bibliographic Reference: REPORT TRITA-PFU 82-15, 1982
Record Number: 1989122052700 / Last updated on: 1987-01-01
Category: PUBLICATION
Available languages: en
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