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First Astronomical Use of Multiplexed Transition Edge Bolometers



D. J. Benford, Troy A. Ames, James A. Chervenak, Erich N. Grossman, Kent D. Irwin, S. A. De Kotwara, B. Maffci, S. H. Mosely, Francois Pajot, Thomas G. Phillips, Carl D. Reintsema, Cyrille Rioux, Rick A. Shafer, Johannes G. Staguhn, C. Vastel, George M. Voellmer


We present performance results based on the first astronomical use of mutiplexed superconducting bolometers. The Fabry-Perot Interferometer Bolometer Research Experiment (FIBRE) is a broadband submillimeter spectrometer that achieved first light in June 2001 at the Caltech Submillimeter Observatory (CSO). FIBRE's detectors are superconducting transition edge sensor (TES) bolometers read out by a SQUID mulitplexer. The Fabry-Perot uses a low resolution grating to order sort the incoming light. A linear bolometer array consisting of 16 elements detects this dispersed light, capturing 5 orders simultaneously from one position on the sky. With tuning of the Fabry-Pero over one free spectral range, a spectrum covering Δ}λ/λ=1/7 at a resolution of δλ/λapproximately equal}1/1200 can be acquired. This spectral resolution is sufficient to resolve doppler broadened line emission from external galaxies. FIBRE operates in the 350 υm and 450 υm bands. These bands cover line emission from the important PDR tracers neutral carbon [Cl] and carbon monoxide (CO). We have verified that the multiplexed bolometers are photon noise limited even with the low power present in moderate resolution spectrometry.
Proceedings Title
Proc., 9th Intl Wkshp on Low Temp. Detectors (LTD)
AIP 605
Conference Dates
July 22-29, 2001
Conference Location
Madison, WI, USA


SQUID, superconducting bolometers, transition edge sensor


Benford, D. , Ames, T. , Chervenak, J. , Grossman, E. , Irwin, K. , De Kotwara, S. , Maffci, B. , Mosely, S. , Pajot, F. , Phillips, T. , Reintsema, C. , Rioux, C. , Shafer, R. , Staguhn, J. , Vastel, C. and Voellmer, G. (2002), First Astronomical Use of Multiplexed Transition Edge Bolometers, Proc., 9th Intl Wkshp on Low Temp. Detectors (LTD), Madison, WI, USA (Accessed June 16, 2024)


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Created January 31, 2002, Updated October 12, 2021