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Configurable error correction of code-division multiplexed TES detectors with a cryotron switch.
Joel C Weber1,2, Joseph W Fowler1,2, Malcolm Durkin1,2
1National Institute of Standards and Technology, Boulder, Colorado 80305, USA.
Applied Physics Letters
|March 15, 2024
Summary
Superconducting cryotron switches enable reconfigurable milliKelvin circuitry. Integrating them into SQUID multiplexed arrays allows for error correction, recovering data after sensor failures.
Area of Science:
- Physics
- Electrical Engineering
- Cryogenics
Background:
- Superconducting circuits operating at milliKelvin temperatures offer extremely low power dissipation.
- The cryotron switch is a promising building block for such circuits.
- Current multiplexing techniques for sensor arrays face limitations.
Purpose of the Study:
- To demonstrate the utility of cryotron switches for reconfigurable milliKelvin circuitry.
- To implement error correction in SQUID multiplexed sensor arrays using cryotron switches.
- To enhance data recovery in the event of sensor failures.
Main Methods:
- Integrating a magnetically actuated thin-film cryotron switch into a flux-summed code-division SQUID multiplexed readout.
- Utilizing the cryotron switch to provide a zero-signal output from a single transition-edge-sensor (TES) microcalorimeter upon failure.
- Constraining the demodulation matrix to recover data from remaining sensors.
Main Results:
- Successful integration of a cryotron switch into a SQUID multiplexed readout system.
- Demonstration of configurable error correction capabilities.
- Enabling data recovery from functioning sensors after a single sensor failure.
Conclusions:
- The cryotron switch is a viable component for building reconfigurable milliKelvin circuitry.
- This integration provides a practical application for cryotron switches and a method for error correction in sensor arrays.
- Establishes a foundation for more complex milliKelvin electronic systems.
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