EXPERIMENTAL MEASUREMENTS OF RADIATION DAMAGE TO POWER DIODES AT CRYOGENIC TEMPERATURE.
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The feasibility of a passive quench protection system for the Superconducting Super Collider (SSC) main ring magnets depends on the radiation resistance of the diodes used as current bypass elements. The diodes will be located inside the magnet cryostat, subjecting them to liquid helium temperature and a relatively high radiation flux. A test was performed on five types of power diodes to determine their relative response to neutron radiation at cryogenic temperature. The forward and reverse characteristics of the diodes were monitored as a function of exposure while the diodes were maintained at an ambient temperature of 80 K. These results showed a strong dependence on diode type, ranging from relatively little damage in some diodes to complete failure in other diodes.
author list (cited authors)
Zeigler, J., Carcagno, R., & Weichold, M.
complete list of authors
Zeigler, J||Carcagno, R||Weichold, M