Share Email Print
cover

Proceedings Paper

Z-Spec: a broadband direct-detection millimeter-wave spectrometer -- instrument status and first results
Author(s): L. Earle; P. Ade; J. Aguirre; R. Aikin; J. Battle; J. Bock; C. M. Bradford; M. Dragovan; L. Duband; J. Glenn; G. Griffin; V. Hristov; P. Maloney; H. Matsuhara; B. Naylor; H. Nguyen; M. Yun; J. Zmuidzinas
Format Member Price Non-Member Price
PDF $14.40 $18.00

Paper Abstract

We report on the status of Z-Spec, including preliminary results of our first astronomical measurements. Z-Spec is a cryogenic, broadband, millimeter-wave grating spectrometer designed for molecular line surveys of galaxies, including carbon monoxide redshift measurements of high-redshift submillimeter sources. With an instantaneous bandwidth of 185-305 GHz, Z-Spec covers the entire 1 mm atmospheric transmission window with a resolving power of 200-400. The spectrometer employs the Waveguide Far-Infrared Spectrometer (WaFIRS) architecture, in which the light propagation is confined within a parallel-plate waveguide, resulting in a minimum mechanical envelope. Its array of 160 silicon-nitride micromesh bolometers is cooled to below 100 mK for background-limited performance. With its sensitivity, broad bandwidth, and compactness, Z-Spec serves as a prototype for a future far-IR spectrometer aboard a cold telescope in space. Z-Spec successfully demonstrated functionality with a partial array of detectors and warm electronics during a week-long engineering run at the Caltech Submillimeter Observatory in June, 2005. We describe the instrument performance evaluated at the telescope and in subsequent laboratory tests and compare these results with design specifications. Following several modifications we returned to the telescope in April, 2006. We present a preliminary astronomical spectrum and discuss our plans to improve sensitivity and throughput to achieve our ultimate science goals.

Paper Details

Date Published: 6 July 2006
PDF: 9 pages
Proc. SPIE 6275, Millimeter and Submillimeter Detectors and Instrumentation for Astronomy III, 627510 (6 July 2006); doi: 10.1117/12.672309
Show Author Affiliations
L. Earle, Ctr. for Astrophysics and Space Astronomy, Univ. of Colorado, Boulder (United States)
P. Ade, Cardiff Univ. (United Kingdom)
J. Aguirre, National Radio Astronomy Observatory (United States)
Ctr. for Astrophysics and Space Astronomy, Univ. of Colorado, Boulder (United States)
R. Aikin, Univ. of Colorado, Boulder (United States)
J. Battle, Cardiff Univ. (United Kingdom)
J. Bock, Cardiff Univ. (United Kingdom)
C. M. Bradford, Jet Propulsion Lab. (United States)
M. Dragovan, Jet Propulsion Lab. (United States)
L. Duband, Commissariat à l’Energie Atomique, Grenoble (France)
J. Glenn, Ctr. for Astrophysics and Space Astronomy, Univ. of Colorado, Boulder (United States)
G. Griffin, California Institute of Technology (United States)
V. Hristov, California Institute of Technology (United States)
P. Maloney, Ctr. for Astrophysics and Space Astronomy, Univ. of Colorado, Boulder (United States)
H. Matsuhara, Institute of Space and Aeronautical Science (Japan)
B. Naylor, California Institute of Technology (United States)
H. Nguyen, Jet Propulsion Lab. (United States)
M. Yun, Jet Propulsion Lab. (United States)
J. Zmuidzinas, California Institute of Technology (United States)


Published in SPIE Proceedings Vol. 6275:
Millimeter and Submillimeter Detectors and Instrumentation for Astronomy III
Jonas Zmuidzinas; Wayne S. Holland; Stafford Withington; William D. Duncan, Editor(s)

© SPIE. Terms of Use
Back to Top