Plasma Equilibrium and Field Diffusion during Current Rise Phase of STP-2 Screw Pinch Tokamak

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概要

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• Plasma equilibrium and field diffusion during the current rise phase of the discharge have been investigated in STP-2 screw pinch tokamak. The plasma with maximum poloidal beta value β_P of 3.0 has been obtained by compression and joule heating. However the maximum β_P value without strong wall contacts was about 1.3. We observed that force-free current is formed in the periphery of the plasma and the penetration rate of the poloidal magnetic field is much faster than the penetration rate calculated from the classical resistivity. To understand the high-beta plasma equilibrium and the mechanism of fast penetration rate observed in STP-2 plasmas we have performed a numerical simulation using a 2-D MHD pinch code "TOPICS". It is demonstrated that the fast penetration rate can be explained by introducing the influx of neutral particles and the ion acoustic type anomalous resistivity.

• 核融合科学研究所の論文

著者

• Nagata Akiyoshi

  Research Information Center Institute Of Plasma Physics Nagoya University

関連論文

• Plasma Equilibrium and Field Diffusion during Current Rise Phase of STP-2 Screw Pinch Tokamak

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