Test of Fermilab built, post-ASST, 50-mm-aperture, full length SSC dipole magnets

摘要

During 1992 at Fermilab, a series of nine 50-mm-aperture, 15-m-long, SSC superconducting dipole magnets, designed jointly by Fermilab, Brookhaven National Laboratory, and the SSC Laboratory, have been built and successfully cold tested. Seven of these dipole magnets, designate for the Accelerator System String Test (ASST) carried out at SSCL in Dallas, were assembled Fermilab by General Dynamics personnel, and have achieved the nominal operating current level without significant training. In addition, a series of four R&D magnets (DCA320 323) we manufactured at Fermilab to test an alternative insulation schemes. In this paper we present th quench performance of these four R&D magnets, which were cold tested at the Fermilab Magnet Test Facility at nominal temperatures of 4.35 K, 3.85 K, and 3.50 K. An extended characterization test was performed on one of these magnets (DCA322). During this test the magnet was successfully cooled down to superfluid He temperature (1.8 K) and reached a field B (ge) 9.5 T.