Passive temperature regulation in superconducting circuits

The thermal switch system in superconducting circuits addresses the challenge of temperature regulation by allowing the cryocooler to cool the superconducting load to a lower temperature than the superconducting material, optimizing magnetic field generation and energy storage.

WO2025071418A1 Publication Date: 2025-04-03VICTORIA LINK LTD
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Patent Information

Application Number
PCT/NZ2024/050111
Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
Priority Date
2023-09-28
Filing Date
2024-09-30
Publication Date
2025-04-03

AI Technical Summary

Technical Problem

Superconducting circuits face challenges in temperature regulation, particularly in maintaining superconducting loads at low temperatures while allowing other components to be near their critical temperature, which is conventionally achieved using complex and inefficient heat regulation systems.

Method used

The technology introduces a thermal switch configured between a cryocooler and a loop of superconducting material, allowing the cryocooler to cool the superconducting load to a lower temperature than the superconducting material, with the thermal switch switching between configurations to manage thermal conductance.

Benefits of technology

This approach enables efficient temperature regulation, allowing the superconducting load to be maintained at a lower temperature for higher magnetic field generation while keeping other components at a higher temperature, thus optimizing energy storage and magnetic field capabilities.

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Abstract

There is provided an assembly for regulating temperature in a system for supplying current to a superconducting load. The assembly may comprise a thermal switch positioned between a cryocooler and a length of superconducting material comprised in a loop of superconducting material in which a voltage is generated by a flux pump. The cryocooler may additionally be thermally connected to the superconducting load. The thermal switch may be configured such that the cryocooler cools the superconducting load to a lower temperature than the length of superconducting material. The temperature to which the length of superconducting material is cooled may be substantially close to a critical temperature of the length of superconducting material. Forms of the technology also relate to the thermal switch and the flux pump.
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