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

• Published in: IEEE transactions on applied superconductivity Vol. 21; no. 3
• Main Authors: Ambrosio, G., Andreev, N., Anerella, M., Barzi, E., Bingham, B., Bocian, D., Bossert, R., Caspi, S., Chlachidize, G., Dietderich, D., Escallier, J., Felice, H., Ferracin, P., Ghosh, A., Godeke, A., Hafalia, R., Hannaford, R., Jochen, G., Kashikhin, V. V., Kim, M. J., Kovach,, P., Lamm, M., McInturff, A., Muratore, J., Nobrega, F., Novitsky, I., Orris, D., Prebys, E., Prestemon, S., Sabbi, G. L., Schmalzle, J., Sylvester, C., Tartaglia, M., Turrioni, D., Velev, G., Wanderer, P., Whitson, G., Zlobin, A. V.
• Format: Journal Article
• Language: English
• Published: United States 01-08-2010
• Subjects: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; LARP; long magnet; Nb{sub 3}Sn; PARTICLE ACCELERATORS; superconducting magnet
• ISSN: 1051-8223; 1558-2515
• DOI: 10.1109/TASC.2010.2089586

In December 2009 during its first cold test, LQS01, the first long Nb{sub 3}Sn 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 fo Energy, CERN and LARP, as a significant milestone toward the development of Nb{sub 3}Sn quadrupoles for possible use in LHC luminosity upgrades. LQS01 is a 90 mm aperture, 3.7 m long quadrupole using Nb{sub 3}Sn 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.