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A new 790 – 940 GHz heterodyne receiver, ASTE Band 10, was installed in October 2019 on ASTE (Atacama Submillimeter Telescope Experiment), a 10 m submillimeter telescope near of the ALMA site in Chile. An ALMA Band 10 prototype receiver was upgraded with SIS mixers employing high-Jc junctions. The receiver noise temperature (TDSB) measured in the laboratory is between 175 K and 344 K. The achieved system noise temperature on ASTE toward the zenith was 2400 K (PWV <1.0 mm). Their Allan variances were less than 2.0 x 10-6 for timescales in the range of 0.05 sec < T <100 sec.
Tetsuya Ito,Yasunori Fujii,Motoko Inata,Takeshi Kamazaki,Seiichi Sakamoto, andShin'ichiro Asayama
"Upgrade of an ALMA Band 10 prototype receiver for ASTE radio telescope", Proc. SPIE 11453, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy X, 114533Q (13 December 2020); https://doi.org/10.1117/12.2561076
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Tetsuya Ito, Yasunori Fujii, Motoko Inata, Takeshi Kamazaki, Seiichi Sakamoto, Shin'ichiro Asayama, "Upgrade of an ALMA Band 10 prototype receiver for ASTE radio telescope," Proc. SPIE 11453, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy X, 114533Q (13 December 2020); https://doi.org/10.1117/12.2561076