Motion of the Double ThetaPinch Plasma
Abstract
Macroscopic radial motion of a long annular plasma produced by a double theta pinch is studied by experiments and some of the results are compared with calculations using a simple vacuum field model. It is shown that the radial motion is roughly divided into two parts, slow motion of the equilibrium position r_{0} and small radial oscillation r_{1}. The equilibrium position r_{0} is controllable by changing the ratio of the current in the ordinary thetapinch coil to that in the inverse one. The resistance of the plasma has effect to damp both r_{0} and r_{1} motions, and the damping constant of r_{0} is about twice that of r_{1}. It is also shown that the resistive damping of r_{0} can be suppressed selectively by the power crowbarring of the current in the inverse thetapinch coil, while r_{1} damps to vanish by the resistance of the plasma.
 Publication:

Journal of the Physical Society of Japan
 Pub Date:
 October 1976
 DOI:
 10.1143/JPSJ.41.1356
 Bibcode:
 1976JPSJ...41.1356K
 Keywords:

 Annular Flow;
 Magnetohydrodynamic Flow;
 Plasma Control;
 Plasma Oscillations;
 Radial Flow;
 Theta Pinch;
 Analog Simulation;
 Controlled Fusion;
 Dense Plasmas;
 High Temperature Plasmas;
 Magnetic Probes;
 Plasma Diagnostics;
 Plasma Physics