Summary
This paper presents the preliminary cryogenic system design for a conduction-cooled Nb₃Sn superconducting undulator magnet prototype at Argonne National Laboratory. Using 3D finite element analysis in COMSOL Multiphysics, the authors modelled thermal properties during cooldown and steady-state operation with a SHI RDK-415D cryocooler, predicting minimal temperature gradients (0.11 K) essential for maintaining operating margin. The work includes optimised designs for thermal links, support rods, and current leads to enable stable operation at 4 K and 950 A DC.
UK applicability
This is specialised accelerator physics research with limited direct applicability to UK agricultural or food systems research. However, the thermal modelling methodology and cryogenic engineering principles may have peripheral relevance to UK synchrotron facilities or materials science institutions.
Key measures
Coil temperature differential (ΔT = 0.11 K); winding temperature range (3.42–3.53 K); cooldown time; steady-state baseline temperature; thermal link performance via 3D FEA simulation
Outcomes reported
The study reports thermal modelling results for a 0.5 m conduction-cooled Nb₃Sn undulator magnet prototype, predicting maximum coil temperature differential of 0.11 K and steady-state winding temperature range of 3.42–3.53 K. The research also presents design and optimisation of support structures and current leads for operation at 4 K with 950 A DC.
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