Thermal Model of a Quench in Superconducting Undulators

[摘要] Currently there are two 1.1 m long planar superconducting undulators (SCUs) in operation in the Advanced Photon Source storage ring. Their NbTi magnets are cooled with liquid Helium (LHe) penetrating through a channel in the magnet coil formers. In this scheme, the latent heat of LHe provides an effective energy buffer that allows the magnet to return to normal operation within minutes. An FEA-based dynamic thermal model of the SCU is being developed to analyze the behavior of the SCU cryogenic systems during a quench. In this paper, preliminary results of these FEA-based calculations and a comparison with the current operation of SCUs are presented.

[发布机构] Advanced Photon Source, Argonne National Laboratory, Argonne; IL; 60439, United States^1

[效力级别] 物理学 [学科分类] 材料科学（综合）

[关键词] Advanced photon source;Cryogenic system;Dynamic thermal modeling;Effective energy;Liquid helium;Normal operations;Superconducting undulators;Thermal model