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Z-Spec: a broadband, direct-detection, millimeter-wave spectrometer

Phillips, Thomas G., Naylor, Bret J., Ade, Peter A. R. ORCID: https://orcid.org/0000-0002-5127-0401, Bock, James J., Bradford, Charles M., Dragovan, Mark, Duband, Lionel, Earle, Lieko, Glenn, Jason, Matsuhara, Hideo, Nguyen, Hien, Yun, Minhee, Zmuidzinas, Jonas and Zmuidzinas, Jonas 2003. Z-Spec: a broadband, direct-detection, millimeter-wave spectrometer. Presented at: Millimeter and Submillimeter Detectors for Astronomy, Waikoloa, HI, USA, 25 August 2002. Published in: Phillips, Thomas G. and Zmuidzinas, Jonas eds. Millimeter and Submillimeter Detectors for Astronomy (Proceedings). Proceedings of Spie (4855) Bellingham, WA: SPIE, pp. 239-248. 10.1117/12.459419

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Abstract

Z-Spec is a broadband (195 - 310 GHz), direct-detection, millimeter-wave spectrometer with moderate resolution (R ~ 350) that we are building to observe CO rotational lines and atomic fine-structure lines in the recently discovered population of submillimeter galaxies. A large fraction of these sources cannot be identified optically and thus redshift determination is extremely difficult. The large instantaneous bandwidth of Z-Spec will allow measurement of redshifts up to z~4 via detection of two or more CO lines in a single spectrum. The spectrometer is based on a parallel-plate waveguide grating architecture that is substantially more compact than a conventional free-space grating system. The spectrometer and an array of 160 silicon nitride micromesh bolometers will be cooled to 100 mK to provide background-limited sensitivity. In addition to measuring the redshifts of sources discovered in submillimeter continuum surveys, Z-Spec will demonstrate a novel spectrometer concept well-suited for future far-infrared space missions.

Item Type: Conference or Workshop Item (Paper)
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Subjects: Q Science > QB Astronomy
Uncontrolled Keywords: Extremely high frequency ; Spectrometers ; Waveguides ; Bolometers ; Far infrared ; Free space ; Galactic astronomy ; Silicon
Publisher: SPIE
ISBN: 9780819446343
ISSN: 0277-786X
Last Modified: 25 Oct 2022 10:02
URI: https://orca.cardiff.ac.uk/id/eprint/60913

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