PLASMA ANALYSIS VIA A RIGID ROTATION MODEL.
JOHNS HOPKINS UNIV SILVER SPRING MD APPLIED PHYSICS LAB
Pagination or Media Count:
A combined experimental and theoretical study was made of a hydrogen-helium plasma produced by a conical theta-pinch gun that fires into an evacuated drift tube containing an axial magnetic field. The experimental input to the analysis includes the magnetic field on the axis, the flux ejected by the plasma, and the frequency of the radial m 0 oscillations of the puff. The background magnetic field in the drift tube and the electron temperature, determined from the ratio of the intensities of the He II 4686 A and He I 5876 A lines, complete the set of input parameters. The use of a previously developed rigid rotation model allows one to obtain specific density and magnetic field profiles. A correction is then derived that enables both the fraction of the total azimuthal current carried by the ions and the ion temperature to be determined. The entire process was incorporated in a computer program that permits rapid processing of substantial amounts of data. Finally, the results of analyzing 39 puffs are tabulated. Author
- Plasma Physics and Magnetohydrodynamics