Back to Heat Transfer and Phase Change  |  Previous paper  |  Next paper

Superconducting RF Cavity Performance Degradation after Quenching in Static Magnetic Field

I. Terechkine1 T. Khabiboulline1 D. Sergatskov1
1Fermi National Accelerator Laboratory, Batavia, IL, USA

Focusing lens between RF cavities in a cryomodule of a PXIE test facility at FNAL.

Performance degradation of a superconducting RF cavity after quenching in an external magnetic field was calculated using COMSOL. This degradation is due to the increased resistance of a superconducting surface with trapped magnetic flux. The amount of the trapped flux depends on the size of the normally-conducting opening that develops in the superconducting wall of a cavity during quenching. This size is found by solving time dependent problem of heat propagation in walls of RF cavities; the trapped flux can be found by making static magnetic modeling for any specific geometry that includes the quenching cavity and a source of the magnetic field. Results of simulation are compared with the data obtained in a specially designed experiment.

Share it on Social Media: