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Author(s):
K. Nishimura, R. Horiuchi and T. Sato
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Title:
Tilt Stabilization by Energetic Ions Crossing Magnetic Separatrix in Field-Reversed Configuration
Date of publication:
June 1997
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Key words:
field-reversed configuration, FRC, tilt instability, particle simulation
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Abstract:
The stabilization of the tilt disruption in a field-reversed configuration is investigated by means of a three-dimensional particle simulation. The growth rate of tilting instability decreases as the beta value at magnetic separatrix brta_sp increases, while it is slightly affected by the finite-Larmor radius parameters bar{s} and the hollowness parameter of an equilibrium current profile D under the condition that beta_sp is less than 0.1. It is found that the number flux of ions crossing the separatrix repeatedly increases with increasing beta_sp and the crossing motion of energetic ions plays a role in leading to the tilt stabilization by disturbing the unstable tilting motion.
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