Stability of low‐shear tokamaks
作者:
F. L. Waelbroeck,
R. D. Hazeltine,
期刊:
Physics of Fluids(00319171)
(AIP Available online 1988)
卷期:
Volume 31,
issue 5
页码: 1217-1223
ISSN:0031-9171
年代: 1988
DOI:10.1063/1.866750
出版商: AIP
数据来源: AIP
摘要:
It has been suggested that the recently observed fast sawtooth crashes are caused by a low‐shear, pressure‐driven ideal instability. This hypothesis is investigated, using asymptotic methods to solve the toroidal mode equations for a class of equilibria characterized by a low‐shear central region in whichq−1 is small, separated from the wall by a region with finite shear. A dispersion relation that differs significantly from previous results is obtained. An explicit expression for the growth rate is given for a modelqprofile.
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