dc and ac electrical conductivity of alumina and sapphire were measured during irradiation with spallation neutrons at the Los Alamos Spallation Radiation Effects Facility to a fluence of about 0.02 dpa. Both ac and dc voltages were applied during irradiation at 395, 615 and 655° C in an attempt to measure radiation-induced electrical degradation (RIED). RIED-like effects were observed in the evacuated AC capsules, but no RIED was observed with the dc capsules in about 1 atm of argon gas. The dc measurements showed an initial high increase in conductivity followed by a continual decrease with increasing fluence. We believe that postirradiation conductivity measurements must be made to confirm the observed current increases in the ac capsules.
ASJC Scopus subject areas
- Nuclear and High Energy Physics
- Materials Science(all)
- Nuclear Energy and Engineering