Design and Construction of Test Coils for MICE Coupling Solenoid Magnet

• Published in: IEEE transactions on applied superconductivity Vol. 19; no. 3; pp. 1340 - 1343
• Main Authors: Li Wang, Pan, H., Xu, F.Y., Liu, X.K., Chen, A.B., Li, L.K., Guo, X.L., Wu, H., Green, M.A., Li, D.R., Strauss, B.P.
• 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: AC losses; Applied sciences; Charging; Coils; Construction; cool down test; Cooling; Couplings; Design. Technologies. Operation analysis. Testing; Electrical engineering. Electrical power engineering; Electromagnets; Electronics; Exact sciences and technology; Integrated circuits; Ionization; Joining; Mesons; Mice; MICE magnet; Muons; quench; Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices; Solenoids; Stress; Studies; Superconducting coils; Superconducting magnets; Testing; Various equipment and components; Winding; winding system; quench; stress; Cooling; Thermal management (packaging); Magnet; Worst case method; MICE magnet; Experimental study; cool down test; Thickness; winding system; Inductance; Solenoid; Cavity; Ionization; Cooling system; Stress effects; AC losses; Magnetic field; Room temperature; Machine windings
• ISSN: 1051-8223; 1558-2515
• DOI: 10.1109/TASC.2009.2018056

The superconducting coupling solenoid to be applied in the Muon Ionization Cooling Experiment (MICE) is made from copper matrix Nb-Ti conductors with inner radius of 750 mm, length of 285 mm and thickness of 102.5 mm at room temperature. The magnetic field up to 2.6 T at the magnet centerline is to keep the muons within the MICE RF cavities. Its self inductance is around 592 H and its magnet stored energy is about 13 MJ at a full current of 210 A for the worst operation case of the MICE channel. The stress induced inside the coil during cool down and charging is relatively high. Two test coils are to build and test in order to validate the design method and develop the fabrication technique required for the coupling coil winding, one is 350 mm inner diameter and full length same as the coupling coil, and the other is one-quarter length and 1.5 m diameter. The 1.5 m diameter coil will be charged to strain conditions that are greater than would be encountered in the coupling coil. This paper presents detailed design of the test coils as well as developed winding skills. The analyses on stress in coil assemblies, AC loss, and quench process are carried out.