Optics Design and Verificatgion for the APEX Swedish Heterodyne Facility Instrument (SHeFI)
Journal article, 2009

In this paper, we present the design and verification of the optics of the Swedish Heterodyne Facility Instrument (SHeFI) receiver installed in the Atacama Pathfinder EXperiment (APEX) telescope during spring 2008. SHeFI is located in the Nasmyth instrumentation Cabin A (NCA). The receiver has been designed to have 6 frequency channels, of which four receiver channels have been built, and characterized: 211-275 GHz(Band 1), 275-370 GHz (Band 2), 385-500 GHz (Band 3), and 1250-1390 GHz (Band T2). Bands 1, 2, and T2 are installed at the telescope and are currently in operation. The optical design is driven by the requirement of frequency independent illumination of the secondary with -12 dB edge taper for each frequency channel and the limitation (beam clearance through the Nasmyth tube and the elevation encoder) imposed by the receiver position in the NCA. This paper describes the design approach, optimization, and verification of the optical system, coupling each individual receiving beam to the common optics of the telescope.

Author

Olle Nyström

Chalmers, Department of Radio and Space Science, Advanced Receiver Development

Igor Lapkin

Chalmers, Department of Radio and Space Science, Advanced Receiver Development

Vincent Desmaris

Chalmers, Department of Radio and Space Science, Advanced Receiver Development

Dimitar Milkov Dochev

Chalmers, Department of Radio and Space Science, Advanced Receiver Development

Sven-Erik Ferm

Chalmers, Department of Radio and Space Science, Advanced Receiver Development

Mathias Fredrixon

Chalmers, Department of Radio and Space Science, Advanced Receiver Development

Doug Henke

Chalmers, Department of Radio and Space Science, Advanced Receiver Development

Denis Meledin

Chalmers, Department of Radio and Space Science, Advanced Receiver Development

Raquel Monje

Chalmers, Department of Radio and Space Science, Advanced Receiver Development

Magnus Strandberg

Chalmers, Department of Radio and Space Science, Advanced Receiver Development

Erik Sundin

Chalmers, Department of Radio and Space Science, Advanced Receiver Development

Vessen Vassilev

Chalmers, Department of Radio and Space Science, Advanced Receiver Development

Victor Belitsky

Chalmers, Department of Radio and Space Science, Advanced Receiver Development

Journal of Infrared, Millimeter, and Terahertz Waves

1866-6892 (ISSN)

Vol. 30 7 746-761

Subject Categories

Other Engineering and Technologies

Other Engineering and Technologies not elsewhere specified

Atom and Molecular Physics and Optics

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11/5/2018