PT Unknown
AU Kawamura, J
   Blundell, R
   Tong, CE
   Papa, DC
   Hunter, TR
   Gol'tsman, G
   Cherednichenko, S
   Voronov, B
   Gershenzon, E
TI First light with an 800 GHz phonon-cooled HEB mixer receiver
SE Proc. 9[super:th] Int. Symp. Space Terahertz Technol.
PY 1998
BP 35
EP 43
DE HEB; mixer; LO power; local oscillator power; saturation effect; dynamic range
AB Phonon-cooled superconductive hot-electron bolometric (HEB) mixers are incorporated in a waveguide receiver designed to operate near 800 Gliz. The mixer elements are thin-film nio- bium nitride microbridges with dimensions of 4 nm thickness, 0.2 to 0.3 p.m in length and 2 jun 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 1.1W. A fixed-tuned version of the re- ceiver 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 celes- tial origin.
PI Pasadena, California, USA
ER