PRODUCTION ENGINEERING MEASURE FOR LOW FIELD MAGNETRON BL-234C.
Quarterly progress rept. no. 4, 28 Jan-28 Apr 66.
BOMAC DIV VARIAN ASSOCIATES BEVERLY MASS
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Life tests were continued during this period. Tube no. 11S, which contains the internally heated tungsten dispenser cathode has been operated 160 hours thus far within specification limits. Tube no. 121, which contains the Semicon Associates nickel matrix cathode, reached end-of-life after 120 RF operating hours. Both tubes have, therefore, exceeded the 100 hour specification requirement. Engineering tubes 11S through 13S, each containing internally heated cathodes, were completed. Two conventionally machined anodes were completed through cold test. Success was reached in processing modified broachs from HS steel to finish machine the anode bore. One of these anodes, however, did not reach final RF evaluation, since heater failure occurred in the internally heated cathode during cathode activation. The other anode is scheduled for assembly in one of the last two engineering tubes. With the successful completion of vibration and shock testing, total environmental testing in accordance with specification requirements was realized. These tests also included humidity, pressure, temperature coefficient, and low temperature operation. Author
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