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The 25th International Symposium on Space Terahertz Technology , 27 ­ 30 April 2014, Moscow, Russia

Poster Session (abstracts are given in alphabetical order)
The operation of SIS mixer as up- and down-convertor at low frequencies for frequency multiplexing
Anton A. Artanov
1,2,*

, Konstantin V. Kalashnikov , Gert de Lange , Valery P. Koshelets

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3

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1

The Kotel'nikov Institute of Radio Engineering and Electronics, Russian Academy of Science, 11/7 Mokhovaya St., 125009, Moscow 2 Moscow Institute of Physics and Technology, Institutskii per., 9, 141700 Dolgoprudny, Moscow Region, Russia 3 SRON Netherlands Institute for Space Research, P.O. Box 800, 9700 AV Groningen, the Netherlands *Email: artanov@hitech.cplire.ru

A feasibility study of a frequency multiplexed read -out scheme for large number Transition Edge Sensor arrays is described in paper [1]. The read-out makes use of frequency up- and down-conversion with Superconducting-Insulator-Superconducting (SIS) tunnel junctions operating at GHz frequencies, in combination with an existing frequency multiplexed read -out at MHz frequencies. Such read-out scheme can drastically reduce the wiring from room temperature to the cryogenic detectors. Experimental measurements of a SIS tunnel junction operating as frequency up - and down-convertors at low frequencies (< 10 H ) w c t. A b t t m m t "t t " SIS -mixer for down- and upconversion with acceptable conversion loss (well below 15 dB) has been demonstrated. Dependencies of the conversion efficiency on the SIS-junction parameters, local oscillator (LO) power and SIS-bias have been measured and compared with theoretical estimations. The best conditions for the SIS -mixer operation at low LO frequencies have been determined. The transitions between different regimes of operations (quantum and classical; quasiparticle and Josephson) have been studied in a wide bath temperature range by using specially designed circuits with an integrated control line for the Josephson effect suppression. Preliminary conclusions on the feasibility of the frequency-multiplexed TES read-out using superconducting tunnel junctions will be presented. The work was supported by The RFBR and the Ministry of Education and S cience of the Russian Federation.
References

1. G. de Lange «F bt f fq c -multiplexed TES readJournal of Low Temperature Physics, special issue LTD 15.

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