Radiation Limits for Nb{sub 3}Sn Superconductors for ITER Magnets: A literature review
The data base on radiation damage to Nb{sub 3}Sn superconductors is compiled from the literature and assessed in this report. Nb{sub 3}Sn superconductors are currently under procurement for use in ITER magnet prototypes. In contrast to the data base on insulation materials proposed for use in ITER magnets, the data base on the radiation damage of Nb{sub 3}Sn is much more complete. Key results have often been confirmed by several groups at different institutions. The investigation of variables that influence radiation damage has also been much more complete for Nb{sub 3}Sn than for insulators. Furthermore, in situ testing of superconducting parameters is much easier than in situ mechanical testing of insulators, and in situ testing has invariably been performed after cryogenic irradiation of Nb{sub 3}Sn. However, in recent years, Nb{sub 3}Sn testing has also suffered from the lack of 4-K irradiation facilities. Just as new processing methods to obtain more economical Nb{sub 3}Sn conductor products in large quantity were being developed, cryogenic irradiation sources were being phased out. Therefore, this brief introductory section presents some basic information on the properties and structure of Nb{sub 3}Sn superconducting composites and the distinctions between different fabrication processes. This provides a background to assess the adequacy of the current cryogenic data base on radiation damage, Also, since synergistic effects of strain and irradiation have recently been investigated, a brief discussion of the effects of strain on Nb{sub 3}Sn properties is included in this introduction.
- Research Organization:
- National Institute of Standards and Technology, Boulder, CO (US)
- Sponsoring Organization:
- US Department of Energy (US)
- DOE Contract Number:
- AI05-90ER54077
- OSTI ID:
- 761709
- Resource Relation:
- Other Information: PBD: 1 Feb 1995
- Country of Publication:
- United States
- Language:
- English
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