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Excitation of internal kink modes by trapped energetic beam ions

Journal Article · · Phys. Rev. Lett.; (United States)

Energetic trapped particles are shown to have a destabilizing effect on the internal kink mode in tokamaks. The growth rate is near the ideal magnetohydrodynamic value, but the frequency is comparable to the trapped-particle precession frequency. A model for the instability cycle gives stability properties, associated particle losses, and neutron emissivity consistent with the ''fishbone'' events observed in poloidal divertor experiments.

Research Organization:
Plasma Physics Laboratory, Princeton University, Princeton, New Jersey 08544
DOE Contract Number:
AC02-76CH03073
OSTI ID:
6998530
Journal Information:
Phys. Rev. Lett.; (United States), Journal Name: Phys. Rev. Lett.; (United States) Vol. 52:13; ISSN PRLTA
Country of Publication:
United States
Language:
English