System design of submillimeter-wave imaging array SISCAM

摘要

Developments on large format array of superconducting tunnel junction detectors are discussed and recent activities inreadout electronics developments and focal plane optics designs are presented. We have been working on submillimeter-wave SIS photon detectors at 650 GHz using niobium tunnel junctions, which have high sensitivity, large dynamic rangeand fast response. Here we discuss on an implementation plan of large format array with cryogenic readout electronicsand compact focal plane optics design. GaAs-JFETs operate at less than 1 K with low noise, low power dissipation andfast response. We have demonstrated operation of cryogenic integrating amplifiers and digital electronics for SIS photondetectors with multiplexed readout. Combined with compact focal plane optics, we now have a conceptual design oflarge format array of SIS photon detectors in submillimeter-wave. Further development to realize higher sensitivitysuperconducting tunnel junction detectors with extremely low leakage current are foreseen.