The Gammas, Electrons, Muons (GEM) Detector, one of the two large detectors planned to be built at the SSC, features high muon momentum resolution. This is achieved by magnetization (by a huge magnet, about 20 m in diameter and 31 m long) of roughly 10,000 m3 of space within the muon chambers. The GEM Detector Magnet1 should be designed to operate with highest possible reliability level to ensure maximum availability of the Detector Systems. That means that the magnet and the conductor should be as stable as practically possible. The conductor should be reliably protected against overheating and electrical breakdown in the case of a quench or fast discharge. For reliability reasons, the magnet dump voltage is relatively low, 500 V to ground, which implies low current density in the conductor. Table 1 lists general requirements for the conductor.
KeywordsWeldability Enthalpy Cage Shipping Helium
Unable to display preview. Download preview PDF.
- 1.B.A. Smith, P.G. Marston, et al., “Design concept for the GEM detector magnet,” presented at the 1992 ASC, Chicago, IL, Aug. 23-28, 1992.Google Scholar
- 3.P.T.M. Clee and D.E. Baynham, “Towards the realisation of two 1.2 Tesla superconducting solenoids for particle physics experiments,” Proc. Int. Conf. MT-11, Tsukuba, Japan, Vol.1, p. 206, 1988.Google Scholar
- 4.D.P. Ivanov et al., “SC toroidal field coils of Tokamak-7,” Atomnaya Energia, 45, (1979) 3, p. 171.Google Scholar
- 6.M.S. Lubell, J.A. Clinard et al. “The IEA Large Coil Task Test Results in ISMTF,” IEEE Transactions on Magnetics, Vol. 24, No. 2, 1988.Google Scholar
- 8.S.D. Peck and P.H. Michels, “Test results from the 200kA SMES/ETM conductor,” Presented at ASC-90, Snowmass, Colorado, 24-28 Sept., 1990.Google Scholar
- 9.D.E. Baynham, N.V. Fetisov, N.N. Martovetsky, “Stability of indirectly cooled conductors with large cross section,” Presented at ASC-92, Chicago, August 23-28, 1992.Google Scholar
- 10.Minervini, J.V., et al., “Cable-in-Conduit Conductor Concept for the GEM Detector Magnet,” presented at the 1992 Applied Superconductivity Conference, Chicago, IL, Aug. 23-28, 1992.Google Scholar
- 11.R.L. Huddleston, “Summary of GEM Magnet Cable/Conduit Assembly Analysis,” Feb. 10. 1993, private communication.Google Scholar