Magnetic Tests of the CMS Superconducting Magnet

• Published in: IEEE transactions on applied superconductivity Vol. 18; no. 2; pp. 356 - 361
• Main Authors: Kircher, F., Bredy, P., Fazilleau, P., Juster, F.-P., Levesy, B., Lottin, J.-P., Rousse, J.-Y., Campi, D., Cure, B., Gaddi, A., Herve, A., Maire, G., Perinic, G., Fabbricatore, P., Greco, M.
• Format: Journal Article Conference Proceeding
• Language: English
• Published: New York, NY IEEE 01.06.2008; Institute of Electrical and Electronics Engineers; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Applied sciences; Bending; Boring; Charging; CMS; Collaboration; Collision mitigation; commissioning; detector magnets; Detectors; Electric power generation; Electrical engineering. Electrical power engineering; Electromagnets; Exact sciences and technology; General equipment and techniques; Halls; Instruments, apparatus, components and techniques common to several branches of physics and astronomy; Internal energy; Large Hadron Collider; Magnetism; Mesons; Physics; Sensors (chemical, optical, electrical, movement, gas, etc.); remote sensing; Solenoids; Superconducting coils; Superconducting magnets; Superconductivity; Testing; Various equipment and components; CERN; Flat top; Magnetic test; Magnet; Measurement sensor; Thermal behavior; CMS; Thermomechanical properties; Magnetic measurement; Commissioning; Superconducting magnet; Solenoid; Trigger; detector magnets; solenoids; superconducting magnets
• ISSN: 1051-8223; 1558-2515
• DOI: 10.1109/TASC.2008.920571

The superconducting magnet for CMS has been designed to reach a 4 T field in a free bore of 6 m over a length of 12.5 m, with a stored energy of 2.6 GJ at nominal current. The magnet has been extensively and successfully tested in a surface hall at CERN in August and October 2006. Its characteristics make it the largest superconducting solenoid ever built in terms of bending power for the physics, stored energy and stored energy per unit of cold mass. The tests of the magnet were carried out by charging it to progressively higher currents. Long current flattops were used for magnetic measurements, generally ending with triggered fast discharges. During the tests, all the relevant parameters related to electrical, magnetic, thermal and mechanical behavior have been recorded and will be reported in the paper. Special emphasis will be put on the results and analysis of phenomena related to induced fast discharges, such as coupling and quench-back effects.