▎ 摘　　要

NOVELTY - The system has a tunneling barrier between an oligolayer conductive sheet and a superconductor. A bias circuit (122) applies a bias voltage across the barrier, where the bias voltage is less than a gap voltage of the superconductor and greater than one-half of the gap voltage. USE - System for cooling graphene used in infrared or microwave detectors and transistors. Can also be used in bolometer, photon detector, and refrigerator. ADVANTAGE - The performance of the low-temperature device is improved as the temperature decreases. The system for cooling graphene is improved. The tunneling barrier is configured to prevent the electrons from tunneling through the conductive sheet to the superconductor. The bias circuit applies a bias voltage across the tunneling barriers to cool the conductors to a temperature that is less than 0.8 of the first temperature, and the bias voltage is greater than one-half of the gap voltage of the superconductors. The thermal noise is reduced by reducing the thermal noise in the tunneled conductive sheets, and thus, the performance of a low- temperature device is increased. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of the cooled photon detector. Bias circuit (122) Graphene-superconductor sensing element (123) Inductors (124) Capacitors (126) Cooling bias network (128)