TRANSIENT RADIATION EFFECTS IN PASSIVE PARTS.
Quarterly progress rept. no. 5, 1 June31 Aug 63,
HUGHES AIRCRAFT CO CULVER CITY CA
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Test were continued on the effects of end-on irradiation of coaxial cables. Since the purpose is to study the effects of cables as they are used in transient radiation effects measurements only end-on configurations are considered. The purpose here is not to study the specific effects per unit length where long lengths are uniformly irradiated. The results indicate that the crossover voltage does not vary appreciably with distance from the reactor so that the same bias voltage can probably be used on the coaxial cable for transient effects measurements at any distance. Cumulative effects in cables are found to depend on the voltage at which the cables were previously irradiated, but equilibrium is reached after about 6 bursts at a level independent of the previous history. Statistical studies show that the spread in responses of a biased cable under fixed conditions is reasonably small. The average result over several bursts for eight cables biased with -9 volts on the shield is -0.910 0.336 microamperes. Author