Next generation of a sub-millimetre wave security camera utilising superconducting detectors

in: Journal of Instrumentation (2013)
May, Torsten; Heinz, Erik; Peiselt, Katja; Zieger, Gabriel; Born, Detlef; Zakosarenko, Vyacheslav; Brömel, Anika; Anders, Solveig; Meyer, Hans-Georg
Based on the previously demonstrated concept of passive security screening utilising superconducting detectors, a next generation camera was developed to meet application demands. The new system was designed to achieve background limited performance using a linear array of up to 128 transition edge sensors which are read in a time domain multiplexing scheme by SQUID current sensors. It will be able to record videos with 256 128 pixels at 25 Hz frame rate. The necessary cooling of the detector array is provided by a commercial pulse tube cooler and a second, self-contained cooling stage. For imaging, different optics modules adapted to a feed-horn detector coupling can be used in combination with a linear scanning apparatus for mirrors up to 40 cm.

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