SEPIA345: A 345 GHz dual polarization heterodyne receiver channel for SEPIA at the APEX telescope
Journal article, 2022
Context. We describe the new SEPIA345 heterodyne receiver channel installed at the Atacama Pathfinder EXperiment (APEX) telescope, including details of its configuration, characteristics, and test results on sky. SEPIA345 is designed and built to be a part of the Swedish ESO PI Instrument for the APEX telescope (SEPIA). This new receiver channel is suitable for very high-resolution spectroscopy and covers the frequency range 272- 376 GHz. It utilizes a dual polarization sideband separating (2SB) receiver architecture, employing superconductor-isolator-superconductor mixers (SIS), and provides an intermediate frequency (IF) band of 4- 12 GHz for each sideband and polarization, thus covering a total instantaneous IF bandwidth of 4 ÃÂ - 8 = 32 GHz. Aims. This paper provides a description of the new receiver in terms of its hardware design, performance, and commissioning results. Methods. The methods of design, construction, and testing of the new receiver are presented. Results. The achieved receiver performance in terms of noise temperature, sideband rejection, stability, and other parameters are described. Conclusions. SEPIA345 is a commissioned APEX facility instrument with state-of-the-art wideband IF performance. It has been available on the APEX telescope for science observations since July 2021.
Submillimeter: general
Instrumentation: detectors
Techniques: spectroscopic
Author
Denis Meledin
Chalmers, Space, Earth and Environment, Onsala Space Observatory
Igor Lapkin
Chalmers, Space, Earth and Environment, Onsala Space Observatory
Mathias Fredrixon
Chalmers, Space, Earth and Environment, Onsala Space Observatory
Erik Sundin
Chalmers, Space, Earth and Environment, Onsala Space Observatory
Sven-Erik Ferm
Chalmers, Space, Earth and Environment, Onsala Space Observatory
Alexey Pavolotskiy
Chalmers, Space, Earth and Environment, Onsala Space Observatory
Magnus Strandberg
Chalmers, Space, Earth and Environment, Onsala Space Observatory
Vincent Desmaris
Chalmers, Space, Earth and Environment, Onsala Space Observatory
Cristian D. López
Chalmers, Space, Earth and Environment, Onsala Space Observatory
Per Bergman
Chalmers, Space, Earth and Environment, Onsala Space Observatory
Michael Olberg
Chalmers, Space, Earth and Environment, Onsala Space Observatory
John Conway
Chalmers, Space, Earth and Environment, Onsala Space Observatory
Karl Torstensson
European Southern Observatory Santiago
Atacama Large Millimeter-submillimeter Array (ALMA)
C. Duran
European Southern Observatory Santiago
F.M. Montenegro-Montes
European Southern Observatory Santiago
IPARCOS-UCM (Instituto de Física de Partículas y del Cosmos)
Complutense University
C. De Breuck
European Southern Observatory (ESO)
Victor Belitsky
Chalmers, Space, Earth and Environment, Onsala Space Observatory
Astronomy and Astrophysics
0004-6361 (ISSN) 1432-0746 (eISSN)
Vol. 668 A2Subject Categories
Telecommunications
Aerospace Engineering
Signal Processing
DOI
10.1051/0004-6361/202244211