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Test Results of the First 3.7 m Long Nb3Sn Quadrupole by LARP and Future Plans

By: Ambrosio, G.; Andreev, N.; Zlobin, A.V.; Whitson, G.; Wanderer, P.; Velev, G.; Turrioni, D.; Tartaglia, M.; Sylvester, C.; Schmalzle, J.; Sabbi, G.L.; Prestemon, S.; Prebys, E.; Orris, D.; Novitsky, I.; Nobrega, F.; Muratore, J.; McInturff, A.; Lamm, M.; Kovach, P.; Kim, M.J.; Kashikhin, V.V.; Jochen, G.; Hannaford, R.; Hafalia, R.; Godeke, A.; Ghosh, A.; Anerella, M.; Barzi, E.; Bingham, B.; Bocian, D.; Bossert, R.; Caspi, S.; Chlachidize, G.; Dietderich, D.; Escallier, J.; Felice, H.; Ferracin, P.;

2011 / IEEE

Description

This item was taken from the IEEE Periodical ' Test Results of the First 3.7 m Long Nb3Sn Quadrupole by LARP and Future Plans ' In December 2009 during its first cold test, LQS01, the first Long Nb3Sn Quadrupole made by LARP (LHC Accelerator Research Program, a collaboration of BNL, FNAL, LBNL and SLAC), reached its target field gradient of 200 T/m. This target was set in 2005 by the US Department of Energy, CERN and LARP, as a significant milestone toward the development of Nb3Sn quadrupoles for possible use in LHC luminosity upgrades. LQS01 is a 90 mm aperture, 3.7 m long quadrupole using Nb3Sn coils. The coil layout is equal to the layout used in the LARP Technological Quadrupoles (TQC and TQS models). Pre-stress and support are provided by a segmented aluminum shell pre-loaded using bladders and keys, similarly to the TQS models. After the first test the magnet was disassembled, reassembled with an optimized pre-stress, and reached 222 T/m at 4.5 K. In this paper we present the results of both tests and the next steps of the Long Quadrupole R&D.