The Development of a Dual Channel SIS Receiver of Trao Telescope

Authors: Park, J-A.1; Han, S-T.2; Kim, T-S.2; Kim, K-D.2; Kim, H-R.2; Chung, H-S.2; Cho, S-H.2; Lee, C-H.2; Yang, J.3

Source: International Journal of Infrared and Millimeter Waves, Volume 20, Number 12, December 1999 , pp. 2039-2047(9)

Publisher: Springer

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Abstract:



We developed a low noise dual channel receiver with 100GHz and 150GHz band, which is used to make the simultaneous observation with two bands. The SIS mixers are used in both bands. The constructed dewar for the receiver has a performance with a vacuum of 10-8torr and a temperature of 4.2K. The receiver noise temperature is 50K(DSB) for 100GHz band and 80K(DSB) for 150GHz band, respectively. In order to achieve the simultaneous observations, the quasioptical system is precisely designed, and also evaluated by measurements in the laboratory. The relative pointing offset between two bands is 3″. We have observed the various sources using the receiver since October 1998.

Keywords: dual channel SIS receiver; quasioptical system; simultaneous observation

Document Type: Research Article

Affiliations: 1: Taeduk Radio Astronomy Observatory, TRAO, Taejon 305–348, Korea. Department of Physics and CAIS, Ewha Womans University, Seoul 120–750, Korea 2: Taeduk Radio Astronomy Observatory, TRAO, Taejon 305–348, Korea 3: Department of Physics and CAIS, Ewha Womans University, Seoul 120–750, Korea

Publication date: December 1, 1999

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