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Description
The US Magnet Development Program (USMDP) is pursuing hybrid dipole magnet testing with low temperature superconductor (LTS) outserts and high temperature superconductor (HTS) inserts, as an efficient way to characterize HTS magnets at higher fields and stress levels. In this work, we present the test and performance characterization of the first hybrid dipole test at the recently upgraded LBNL magnet test facility. The hybrid magnet is composed of a Nb3Sn canted-cosine-theta (CCT) outsert dipole with a 90 mm aperture and a Bi-2212 CCT dipole insert with a 30.8 mm aperture. Both magnets have been previously tested in stand-alone configurations, with the Nb3Sn dipole reaching a bore field of 8.5 T and the Bi-2212 dipole reaching a bore field of 1.6 T. The results of the hybrid magnet are presented in comparison to the predicted performance based on the stand-alone tests. The coupled behavior of the insert and outsert during quench and / or energy extraction is explored. The resulting response from the instrumentation (i.e. voltage taps, strain gages, and hall probes) on the insert and the outsert is also presented.
This work was supported by the U.S. Department of Energy, Office of Science, Office of High Energy Physics, through the US Magnet Development Program under contract No. DE-AC02-05CH11231.
