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Linear tearing mode stability for low-q cylindrical tokamaks

Published online by Cambridge University Press:  13 March 2009

Moshe Rosenblum
Moshe Rosenblum
Affiliation:
INESCO, Inc., La Jolla, CA 92037
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Abstract

Detailed computational results are presented for the stability of linear tearing modes in low-q cylindrical tokamaks with various radial profiles. The stability properties of a widely used ‘classical’ profile are compared with those of a ‘piecewise’ profile. It is shown that the stability properties of low-q tokamak discharges show a sensitive dependence on small changes in the current density profile near the singular surface. While the ‘classical’ profile is stable for a large range of q0, where q0 is the value of the safety factor on the magnetic axis, a similar ‘piecewise’ profile is unstable for the same set of parameters.

Type
Research Article
Information
Journal of Plasma Physics , Volume 31 , Issue 3 , June 1984 , pp. 447 - 463
Copyright
Copyright © Cambridge University Press 1984

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References

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