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The optical, mechanical, and thermal design and performance of the 2<sup>nd</sup> generation redshift (z)and early universe spectrometer, ZEUS-2

Parshley, Stephen C., Ferkinhoff, Carl, Nikola, Thomas, Stacey, Gordon J., Ade, Peter A. R. and Tucker, Carole 2012. The optical, mechanical, and thermal design and performance of the 2<sup>nd</sup> generation redshift (z)and early universe spectrometer, ZEUS-2. Presented at: Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy VI, Amsterdam, The Netherlands, 1 July 2012. Proc. SPIE 8452: Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy VI. The International Society for Optical Engineering, 84521R. 10.1117/12.927238

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Abstract

We have built a new long-slit grating spectrometer (ZEUS-2) for observations in the submillimeter wavelength regime (200-650 &mu;m). ZEUS-2 is optimized for observations of redshifted far-infrared spectral lines from galaxies in the early Universe. The spectrometer employs three transition-edge sensed bolometer arrays, allowing for simultaneous observations of multiple lines in several telluric windows. Here we will discuss the optical, mechanical, and thermal requirements of ZEUS-2 and their subsequent design and performance. The entire instrument is cooled using a pulse tube cryocooler and an adiabatic demagnetization refrigerator. The cryogen-free approach enables remote control of the cooling system and allows for deployment of ZEUS-2 to telescope sites where access is limited. The compact and lightweight design is also within the size and weight constraints of several submm telescopes, making ZEUS-2 deployable at a variety of sites. ZEUS-2 completed a successful engineering run at the CSO on Mauna Kea in May 2012, and we plan to have our science-grade array system deployed on the APEX telescope in Chile for a science run in the fall of 2012.

Item Type: Conference or Workshop Item (Paper)
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Subjects: Q Science > QC Physics
Uncontrolled Keywords: Bolometers ; Cooling systems ; Cryocoolers ; Engineering ; Equipment and services; Far infrared; Galactic astronomy; Spectrometers; Telescopes
Publisher: The International Society for Optical Engineering
ISSN: 0277-786X
Last Modified: 04 Jun 2017 04:57
URI: http://orca-mwe.cf.ac.uk/id/eprint/46759

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