5 October 2012 The optical, mechanical, and thermal design and performance of the 2nd generation redshift (z) and early universe spectrometer, ZEUS-2
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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 μm). 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.
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Stephen C. Parshley, Carl Ferkinhoff, Thomas Nikola, Gordon J. Stacey, Peter A. Ade, Carole E. Tucker, "The optical, mechanical, and thermal design and performance of the 2nd generation redshift (z) and early universe spectrometer, ZEUS-2", Proc. SPIE 8452, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy VI, 84521R (5 October 2012); doi: 10.1117/12.927238; https://doi.org/10.1117/12.927238
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Sensors

Telescopes

Spectroscopy

Copper

Cryocoolers

Stars

Thermography

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