A novel tubular superconductor stabilized with static pressurized helium
- Babcock and Wilcox, Lynchburg, VA (United States)
A new superconductor concept for encapsulated, medium-size magnets with a significantly increased stability margin is presented. A tubular superconductor (TSC) of a few millimeters outer diameter is drawn from a billet (normal metal + superconducting inserts). After winding, the TSC is filled with static gaseous helium under pressure, which serves as an enthalpy stabilizer. The approach is beneficial both for NbTi and Nb{sub 3}Sn magnets, including conductively cooled magnets. For example, Nb{sub 3}Sn TSC magnet for 8 T, 8 K operation has a stability margin up to 8 times greater than a corresponding magnet using a conventional conductor. The stability margin against slow (steady-state) and transient disturbances has been analyzed for TSC and cable-in-conduit conductors (CICC). Analytical expressions for the stability margin have been obtained and optimal helium cross-section have been determined. Results can be used to design helium-filled conductors for magnets operating to maximum stability margin.
- OSTI ID:
- 33523
- Report Number(s):
- CONF-930926-; ISSN 0018-9464; TRN: 95:009257
- Journal Information:
- IEEE Transactions on Magnetics, Vol. 30, Issue 4Pt2; Conference: 13. international conference on magnet technology, Victoria (Canada), 20-24 Sep 1993; Other Information: PBD: Jul 1994
- Country of Publication:
- United States
- Language:
- English
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