A STUDY OF HYDROMAGNETIC WAVE PROPAGATION IN PLASMA (thesis)
The excitation of torsional and compressional hydromagnetic waves and the dispersion relation of the torsional wave in a cylindrical deuterium plasma were investigated. The theory of azimuthally symmetric waves in a cylinder is reviewed, and an expression is derived for the relative excitation of the two wave types by a current between concentric electrodes. The wave type propagating in the cylinder at various frequencies was established by simultaneous measurements of the r and theta components of the wave magnetic field, and the dispersion relation of the torsional wave was measured in the frequency range 0.04 to 0.48 times ion-cyclotron frequency. (The upper frequency limit is due to domination of the compressional wave at higher frequencies.) The measured wave velocity agrees with theoretical calculations of the velocity based on the average of the spectroscopically measured ion density. Scatter in attenuation measurements is too large to give good agreement with the theoretical attenuation, however, the proper general trend is observed. Observations of a plasma surface wave are included. (auth)
- Research Organization:
- California. Univ., Berkeley. Lawrence Radiation Lab.
- DOE Contract Number:
- W-7405-ENG-48
- NSA Number:
- NSA-18-009471
- OSTI ID:
- 4074223
- Report Number(s):
- UCRL-10990
- Country of Publication:
- United States
- Language:
- English
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