High Current Crossed-Field Tube Development.
Final technical rept. 19 Apr 74-18 Apr 75,
HUGHES RESEARCH LABS MALIBU CALIF
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A crossed-field tube has successfully interrupted 10 kA against 100 kV without the use of a voltage recovery rate limiting capacitor. A smaller diameter tube, specifically constructed for this program interrupted 7.8 kA against 100 kV. These results confirm a semi-empirical scaling law which predicts the peak interruptable current level IkA rcm3 where r is the mean electrode radius. Experiments using dual anode feedthrough bushings to reduce the self-magnetic field did not prove effective, indicating that this field may not be responsible for the current limitation. Double pulse interruptions were accomplished at 5.9 kA against 66 kV with an interpulse time of 16.7 msec to approximate 50 Hz operation. No difficulties were encountered under these conditions indicating that repetitive operation does not cause significant gas pressure fluctuations. Also, dissipation calculations and measurements were made for a 100 microsec square current pulse interrupted against 100 kV. The dissipated energy per shot was found to be 250 JkA.
- Electrical and Electronic Equipment