Perpendicular Temperature of the C-Stellarator Plasma

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Abstract
The perpendicular temperature of the current-carrying plasma of the C Stellarator is measured by means of a diamagnetic coil. The perpendicular temperature and the resistivity temperature are in substantial agreement and a particle velocity distribution that is essentially isotropic. For the discharge having a long pulse duration and a higher temperature, the distribution differs from isotropic to a small extent, and the discrepancy becomes larger for the period at the end of the discharge. This suggests the production of runaway electrons, and the resistivity temperature would then appear higher than the true temperature. For the period at the end of the discharge, the plasma density becomes very low, while the Ohmic heating current is forced to be constant by the external electronic feedback control system. Thus the probability of the generation of the runaway electrons increases.

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