TY - JOUR
T1 - Search for radiation-induced electrical degradation in alumina during spallation-neutron irradiation
AU - Farnum, Eugene H.
AU - Clinard, Frank W.
AU - Sommer, Walter F.
AU - Kennedy, James C.
AU - Shikama, Tatsuo
N1 - Funding Information:
* Supported by Fusion Energy.
PY - 1994/9
Y1 - 1994/9
N2 - 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.
AB - 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.
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U2 - 10.1016/0022-3115(94)91008-1
DO - 10.1016/0022-3115(94)91008-1
M3 - Article
AN - SCOPUS:0028497205
SN - 0022-3115
VL - 212-215
SP - 1128
EP - 1132
JO - Journal of Nuclear Materials
JF - Journal of Nuclear Materials
IS - PART B
ER -