INVESTIGATION OF MAGNETICALLY INDUCED IONIZATION.
Semi-annual technical summary rept. no. 4, 1 May31 Oct 64,
GENERAL ELECTRIC CO PHILADELPHIA PA MISSILE AND SPACE DIV
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Experiments were performed in the shock tube-MHD generator under the following conditions The test gas was xenon with temperatures between 3600K and 9500K, electron densities between 10 to the 9th and 16th power electronscc, electrical conductivities between 0.01 mhosm and 3000 mhosm. The magnetic field strength was varied from 5000 to 30000 gauss. Six electrode geometries were used. The major results obtained were Below electron densities of 10 to the 12th power electronscc, sheaths effects at the electrodes completely controlled the generator performance. Between 10 to the 12th and 14th power electronscc, the sheath resistance was greatly reduced if the applied Faraday field was greater than 1000 vm. Above 10 to the 14th power electronscc, the electrode current mechanism was found to be the same as in the cold cathode arc and the sheath resistance was negligible. The measured Hall voltage was appreciably lower than the theoretical value. However, it was determined that the sheath effect was more detrimental to the achievement of magnetically induced ionization than the low Hall voltage.