A 279 381 ghz sis receiver for the apex telescope
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A 279-381 GHz SIS receiver for the APEX telescope.

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A 279-381 GHz SIS receiver for the APEX telescope

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A 279 381 ghz sis receiver for the apex telescope

A 279-381 GHz SIS receiver for the APEX telescope

C. Risacher1, V. Belitsky1, I. Lapkin2, R. R. Monje1, V. Vassilev1, M . Pantaleev1, A. Pavolotsky1, K.-Å Johansson1, L. G. Gunnarsson1, M. Svensson1, M. Fredrixon1, E. Sundin1, V. P. Robles1, D. Medelin, M.Hagström 1, R. Booth 1

1 Group for Advanced Receiver Development (GARD),

Radio & Space Science Department with Onsala Space Observatory, Chalmers University of Technology, Gothenburg, Sweden

2 Institute of Applied Physics, Russian Academy of Sciences

46 Ulyanov str.,603950 Nizhny Novgorod, Russia


A 279 381 ghz sis receiver for the apex telescope

APEX receivers: Heterodyne Instrumentation


A 279 381 ghz sis receiver for the apex telescope

First light receiver with closed cycle machine

230 GHz channel

345 GHz channel

Outside part of cryostat

Inner part of cryostat


A 279 381 ghz sis receiver for the apex telescope

Signal from input window

Active mirror

4-8 GHz LNA

Flat mirror

Mixer block


A 279 381 ghz sis receiver for the apex telescope

Laboratory test cryostat with liquid helium

4-8 GHz IF LNA

4-8 GHz Isolator

3 mm Teflon window with circular corrugations

Cold teflon lens

200 mm Zitex IR filter

Mixer block


A 279 381 ghz sis receiver for the apex telescope

Mixer block description


A 279 381 ghz sis receiver for the apex telescope

Toptics  12 K

Apex band 2

Loptics  5%

TIF 10-20 K

Gmix  0 - 3 dB

Tmix 10 K


A 279 381 ghz sis receiver for the apex telescope

0 mA coil current : Strong DC Josephson effect


A 279 381 ghz sis receiver for the apex telescope

12.5 mA coil current : DC Josephson effect suppressed


A 279 381 ghz sis receiver for the apex telescope

With LO power applied


A 279 381 ghz sis receiver for the apex telescope

Control system


A 279 381 ghz sis receiver for the apex telescope

Cooling system


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