Direct detection submillimeter spectrometer for CCAT

Thomas Nikola; Gordon J. Stacey; C. Matt Bradford

doi:10.1117/12.790130

19 July 2008 Direct detection submillimeter spectrometer for CCAT

Thomas Nikola, Gordon J. Stacey, C. Matt Bradford

Proceedings Volume 7020, Millimeter and Submillimeter Detectors and Instrumentation for Astronomy IV; 702016 (2008) https://doi.org/10.1117/12.790130
Event: SPIE Astronomical Telescopes + Instrumentation, 2008, Marseille, France

Abstract

We present a trade study for a submillimeter direct-detection spectrometer operating at the background limit for the Cornell Caltech Atacama Telescope (CCAT). In this study we compare the classical echelle spectrometer ZEUS with the waveguide grating spectrometer Z-Spec. The science driver for this instrument is spectroscopic investigation of high redshift galaxies as their far-IR fine structure line emission is redshifted into the telluric submillimeter windows. The baseline detector consists of SQUID multiplexed TES bolometers and the ideal spectrometer to detect weak lines from distant extragalactic sources is a grating with a resolution of ~103 and a large bandwidth, covering an entire telluric submillimeter window instantaneously. Since the density of high-z sources on the sky is ~100 within a 10'×10' field of view and a redshift range of Δz~0.2 we also explore multi-object (~50 objects) capability, including articulated mirrors and flexible waveguide fibers.

Citation Download Citation

Thomas Nikola, Gordon J. Stacey, and C. Matt Bradford "Direct detection submillimeter spectrometer for CCAT", Proc. SPIE 7020, Millimeter and Submillimeter Detectors and Instrumentation for Astronomy IV, 702016 (19 July 2008); https://doi.org/10.1117/12.790130

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