Development of high-sensitive 1.2 mm imaging radiometer with two-polarization antenna-coupled TES-bolometer array for ground-based 6-m optical telescope

Details Development of high-sensitive 1.2 mm imaging radiometer with two-polarization antenna-coupled TES-bolometer array for ground-based 6-m optical telescope Development of high-sensitive 1.2 mm imaging radiometer with two-polarization antenna-coupled TES-bolometer array for ground-based 6-m optical telescope

Aug 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008spie.7020e..54v&link_type=abstract

Millimeter and Submillimeter Detectors and Instrumentation for Astronomy IV. Edited by Duncan, William D.; Holland, Wayne S.; W

Astronomy and Astrophysics

Astronomy

Scientific paper

We describe design of two-polarization imaging array of 7 antenna-coupled TES-bolometers. The fabrication procedure involves both electron beam lithography and convenient optical lithography resulting in submicron definition of TES absorber films (down to ~ 0.2 μm) integrated within planar submm-wave antenna. Concept of matching optics between the long-focus optical telescope and lens-antenna TES bolometer array is described. Two-mirror short-focusing beam concentrator in combination with image rotator provides signal coupling to immersion lenses of the array. Each TES bolometer is coupled via microstrip transmission line to only one polarization of two-polarization crossed double-slot lens-antenna. Design of cryogenic 0.3-K system accommodating the matching optics is presented. We describe multiplexing readout scheme, which combines tomography, rotational scanning of the image and frequency domain division methods that drastically reduce the amount of wiring and substantially increase the final image resolution, especially for low-dimension arrays.

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