Ideal kink modes in tokamak with flattened safety-factor profile
- I. V. Kurchatov Institute of Atomic Energy, Moscow (SU)
A linear theory is derived for ideal kink modes for a tokamak in which the condition {vert bar}{Delta}{ital q}{vert bar}{equivalent to}{vert bar}{ital q}---1{vert bar}{much lt}1 holds in a fairly long region (the corresponding profiles of {ital q} are flattened''). Dispersion relations are derived for kink modes for both monotonic and nonmonotonic flattened {ital q} profiles. The results derived here generalize the results derived by other investigators to the case of a pronounced flattening (small values of {vert bar}{Delta}{ital q}{vert bar}). An ideal instability can occur even with {beta}{sub {ital p}}=0. The growth rate reaches its maximum in the case in which there is no {ital q}({ital a})=1 resonant surface in the plasma.
- OSTI ID:
- 7101913
- Journal Information:
- Soviet Journal of Plasma Physics (English Translation); (USA), Vol. 15:8; ISSN 0360-0343
- Country of Publication:
- United States
- Language:
- English
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