• G. Ambrosio, G. Chlachidze, M.J. Lamm, A. Nobrega, E. Prebys
  Fermilab, Batavia
• S. Caspi, H. Felice, P. Ferracin, G.L. Sabbi
  LBNL, Berkeley, California
• T.W. Markiewicz
  SLAC, Menlo Park, California
• J. Schmalzle, P. Wanderer
  BNL, Upton, Long Island, New York

The first Nb₃Sn Long Quadrupole (LQS01) designed and fabricated by the US LHC Accelerator Research Program (LARP) reached its target gradient of 200 T/m during the first test. LQS01 is a 90 mm aperture, 4 meter long quadrupole with Nb₃Sn coils made of RRP 54/61 strand (by Oxford Superconducting Technology). The two-layer coil design is based on the LARP 1m Technological Quadrupoles (TQC and TQS). The mechanical structure is based on the TQS structure implementing an aluminum shell preloaded by using bladders and keys. In 2005 LARP, in agreement with DOE and CERN, set the goal of reaching 200 T/m in a long Nb₃Sn quadrupole by the end of 2009. Achieving this goal in the first test shows the maturity reached by the Nb₃Sn technology for possible application to particle accelerators. Additional tests have been performed aiming at reproducing the performance of the most recent TQ models in order to demonstrate that there are no significant scale-up issues with this technology.

Slides