What question did this study set out to answer?

The aim is to evaluate the thermal performance of the SCU cryostat with superconducting undulators during cool-down.

February 2, 2026Open Access

Thermal analysis and preliminary cooldown performance of the SCU cryostat

Key Points

The aim is to evaluate the thermal performance of the SCU cryostat with superconducting undulators during cool-down.
Conducted thermal and mechanical modeling of the cryostat
Fabricated the SCU cryostat using liquid helium cooling
Performed preliminary cool-down tests with and without the Nb-Ti SCUs
Compared measured thermal performance with calculated models
Data showed alignment between measured and calculated thermal performance
Cooling tests highlighted critical parameters for the efficiency of the cryostat
Initial performance suggests effective operation of the SCU components

Abstract

The SCU cryostat, featuring two 1.5-meter-long Nb-Ti superconducting undulators (SCUs), is currently being built for the Advanced Photon Source Upgrade. The final design, along with the thermal and mechanical models of this cryocooler-cooled, liquid helium-based cryostat, has been completed. The cryostat has been fabricated, and preliminary cool-down tests were conducted both with and without the two 1.5-meter-long Nb-Ti SCUs. This paper presents a comparison between the measured and calculated thermal performance of the cryostat.

Thermal analysis and preliminary cooldown performance of the SCU cryostat

Key Points

Abstract

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