Development and Coil Fabrication for the LARP 3.7-m Long Nb3Sn Quadrupole

• Published in: IEEE transactions on applied superconductivity Vol. 19; no. 3; pp. 1231 - 1234
• Main Authors: Ambrosio, G., Andreev, N., Anerella, M., Barzi, E., Bossert, R., Caspi, S., Chlachidize, G., Dietderich, D.R., Felice, H., Ferracin, P., Ghosh, A., Hafalia, R., Hannaford, R., Jochen, G., Kashikhin, V.V., Kovach, P., Lamm, M., Lietzke, A., McInturff, A.D., Muratore, J.F., Nobrega, F., Novitsky, I., Peggs, S., Prestemon, S., Sabbi, G.-L., Schmalzle, J., Turrioni, D., Wanderer, P., Whitson, G., Zlobin, A.V.
• Format: Journal Article Conference Proceeding
• Language: English
• Published: New York, NY IEEE 01-06-2009; Institute of Electrical and Electronics Engineers; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Apertures; Applied sciences; Coiling; Coils; Cyclic accelerators and storage rings; Electrical engineering. Electrical power engineering; Electromagnets; Energy use; Exact sciences and technology; Experimental methods and instrumentation for elementary-particle and nuclear physics; Fabrication; Inspection; Large Hadron Collider; LARP; Linear particle accelerator; long magnet; Magnets; Mathematical models; Nb3Sn; Niobium; Niobium-tin; Nuclear physics; Particle accelerators; Physics; Quadrupoles; superconducting magnet; Superconductivity; Tin; Various equipment and components; Particle accelerator; LARP; CERN LHC; Superconducting magnet; Nb3Sn; Research program; High energy; Magnet; Updating; Quadrupoles; long magnet; Research and development
• ISSN: 1051-8223; 1558-2515
• DOI: 10.1109/TASC.2009.2019601

The U.S. LHC Accelerator Research Program (LARP) has started the fabrication of 3.7-m long Nb 3 Sn quadrupole models. The Long Quadrupoles (LQ) are ldquoProof-of-Principlerdquo magnets which are to demonstrate that Nb 3 Sn technology is mature for use in high energy particle accelerators. Their design is based on the LARP Technological Quadrupole (TQ) models, developed at FNAL and LBNL, which have design gradients higher than 200 T/m and an aperture of 90 mm. The plans for the LQ R&D and a design update are presented and discussed in this paper. The challenges of fabricating long accelerator-quality Nb 3 Sn coils are presented together with the solutions adopted for the LQ coils (based on the TQ experience). During the fabrication and inspection of practice coils some problems were found and corrected. The fabrication at BNL and FNAL of the set of coils for the first Long Quadrupole is in progress.