First Light with an 800 GHz Phonon-Cooled HEB Mixer Receiver

Details First Light with an 800 GHz Phonon-Cooled HEB Mixer Receiver First Light with an 800 GHz Phonon-Cooled HEB Mixer Receiver

Mar 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998stt..conf...35k&link_type=abstract

Proceedings of the Ninth International Symposium on Space Terahertz Technology, held March 17-19, 1998, at the Pasadena Hilton H

Astronomy and Astrophysics

Astronomy

14

Heb Mixer, Submillimeter

Scientific paper

Phonon-cooled superconductive hot-electron bolometric (HEB) mixers are incorporated in a waveguide receiver designed to operate near 800 GHz. The mixer elements are thin-film niobium nitride microbridges with dimensions of 4 nm thickness, 0.2 to 0.3 microns in length and 2 microns in width. At 780 GHz the best receiver noise temperature is 840 K (DSB). The mixer IF bandwidth is 2.0 GHz, the absorbed LO power is ~0.1 microwatt. A fixed-tuned version of the receiver was installed at the Submillimeter Telescope Observatory on Mt. Graham, Arizona, to conduct astronomical observations. These observations represent the first time that a receiver incorporating any superconducting HEB mixer has been used to detect a spectral line of celestial origin.

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