Test Results of a Nb3Sn Wind/React 'Stress-Managed' BlockDipole
A second phase of a highfield dipole technology developmenthas been tested. A Nb3Sn block-coil model dipole was fabricated, usingmagnetic mirror geometry and wind/react coil technology. The primaryobjective of this phase was to make a first experimental test of thestress-management strategy pioneered at Texas A&M. In this strategy ahigh-strength support matrix is integrated with the windings to interceptLorentz stress from the inner winding so that it does not accumulate inthe outer winding. The magnet attained a field that was consistent withshort sample limit on the first quench; there was no training. Thedecoupling of Lorentz stress between inner and outer windings wasvalidated. In ramp rate studies the magnet exhibited a remarkablerobustness in rapid ramping operation. It reached 85 percent of shortsample(ss) current even while ramping 2-3 T/s. This robustness isattributed to the orientation of the Rutherford cables parallel to thefield in the windings, instead of the transverse orientation thatcharacterizes common dipole designs. Test results are presented and thenext development phase plans are discussed.
- Research Organization:
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Sponsoring Organization:
- USDOE Director, Office of Science. Office of High Energy andNuclear Physics. Division of High Energy Physics
- DOE Contract Number:
- DE-AC02-05CH11231
- OSTI ID:
- 923644
- Report Number(s):
- LBNL-61418; R&D Project: 0; TRN: US0801890
- Resource Relation:
- Conference: Applied Superconductivity Conference, Seattle,Washington, Aug 28-Sept 1, 2006
- Country of Publication:
- United States
- Language:
- English
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