Cryogenic Detectors with Advanced, High-Speed Readouts

This proposal describes three technical innovations in an effort to develop cryogenic detectors for the UV and x-ray regions. Specifically, the development of improved superconducting tunnel junction (STJ) detectors and arrays using advanced process technologies, single-stage SQUID amplifiers with ultra-low input current noise, and fast, wideband feedback electronics based on a novel high-frequency flux modulation technique. These advances are expected to reduce detector costs and improve detector performance, including the ability to detect and resolve very fast signals. The potential for integration to build large-format arrays also is discussed. This effort directly benefits SEU programs and addresses specific needs for cryogenic detectors and arrays with sensitive, high-speed readouts.