Production and measurement of the MQXA series of LHC low-β insertion quadrupoles

• Published in: IEEE transactions on applied superconductivity Vol. 15; no. 2; pp. 1084 - 1089
• Main Authors: YAMAMOTO, A, NAKAMOTO, T, SUGAWARA, S, SUGITA, K, TANAKA, K, TERASHIMA, A, TSUCHIYA, K, FUJII, T, HASHIGUCHI, E, KANAHARA, T, MURAI, S, ODAJIMA, W, OGITSU, T, ORIKASA, T, OHUCHI, N, AJIMA, Y, HIGASHI, N, IIDA, M, KIMURA, N, OHHATA, K, SHINTOMI, T
• Format: Conference Proceeding Journal Article
• Language: English
• Published: New York, NY Institute of Electrical and Electronics Engineers 01-06-2005
• Subjects: Apertures; Applied sciences; Coiling; Electrical engineering. Electrical power engineering; Electromagnets; Exact sciences and technology; Insertion; Magnetic measurement; Magnets; Quadrupoles; Superconductivity; Various equipment and components; CERN LHC; Superconducting magnet; Mechanical measurement; Field measurement; low-beta insertion quadrupole; Review; Accelerator magnets; Gradient method; Quadrupoles; Quadrupole field; Magnetic measurement; superconducting accelerator magnet
• ISSN: 1051-8223; 1558-2515
• DOI: 10.1109/TASC.2005.849501

The inner triplet quadrupole magnets (MQXA) for the LHC low-beta insertion have been developed. The quadrupoles provide a field gradient of 215 T/m at 1.9 K in a coil aperture of 70 mm diameter and with an effective magnetic length of 6.37 m. The series of 20 magnets have been produced in industry, and full testing has been done at KEK. We present an overview of the production and the results from mechanical and magnetic measurements.