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Configurable error correction of code-division multiplexed TES detectors with a cryotron switch.

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Summary

Superconducting cryotron switches enable reconfigurable milliKelvin circuitry. Integrating them into SQUID multiplexed arrays allows for error correction, recovering data after sensor failures.

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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.