Actions for Critical current changes in Nb3Sn irradiated with fast neutrons at 6 K.

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Critical current changes in Nb3Sn irradiated with fast neutrons at 6 K.

Author
Brown, B. S.
Published
United States : [publisher not identified], 1975.
[Oak Ridge, Tennessee] : [U.S. Atomic Energy Commission], 1975.
Physical Description
microfiche : negative ; 11 x 15 cm
Additional Creators
Birtcher, R. C., Blewitt, T. H., and Wozniak, D. G.

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Summary
The critical current (J/sub c/) was measured in Nb3Sn as a function of neutron dose at 60K up to 1.8 x 1018 n/cm2 (E greater than 0.1 MeV). An increase in J/sub c/ of up to 33 percent at H = 32 kOe was observed after 1.2 x 1018 n/cm2 in material with a high unirradiated J/sub c/ of 1.5 x 106 A/cm2 at 4.20K. Decreases were observed in J/sub c/ after higher doses and the size of the increase in J/ sub c/ and dose of maximum J/sub c/ were a function of magnetic field. The dose and field dependence of the J/sub c/ changes are explained by a model in which the changes in flux pinning and J/sub c/ due to changes with dose in critical temperature, upper critical field, and defect microstructure are considered. Observation of the change of the thermal transition to the normal state are understood by considering the radiation damage in the Cu--Sn stabilizing cladding. (auth)
Report Numbers
CONF-751006-1
Other Subject(s)
Collection
U.S. Atomic Energy Commission depository collection.
Note
DOE contract number: W-31-109-ENG-38
NSA number: NSA-33-001323
OSTI Identifier 4190033
Research organization: Argonne National Lab., Ill. (USA).
View MARC record | catkey: 43931162