Ultrasensitive TES Bolometers for Space Based FIR Astronomy

Morozov, D. , Mauskopf, P.D., Ade, P., Bruijn, M., De Korte, P.A.J., Hoevers, H., Ridder, M., Khosropanah, P., Dirks, B. and Gao, J.-R. (2009) Ultrasensitive TES Bolometers for Space Based FIR Astronomy. In: The Thirteenth International Workshop on Low Temperature Detectors (Ltd13), Stanford, CA, USA, 20-24 Jul 2009, pp. 48-51. ISBN 9780735407510 (doi:10.1063/1.3292385)

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Abstract

We present results from the development of a background limited transition edge sensor (TES) bolometer for the wavelength band 30–60 μm. The bolometer consists of a Ti/Au superconducting thermometer and a Ta radiation absorber deposited on a 200μm×300μm200μm×300μm membrane of SixNySixNy suspended on long, narrow legs. This device is voltage biased and the current through the device is measured by a SQUID amplifier. The thermometer has transition temperature Tc = 108 mKTc = 108 mK and the device is operated from a 70 mK base plate. FIR radiation is coupled into a multimodc horn with entrance aperture of 450 μm, length 4.5 mm and exit aperture of 45 μm, which feeds a metal integrating cavity containing the detector. The radiation band is defined by a pair of lowpass and highpass mesh filters in front of the horn. Here we present measurements of optical noise equivalent power (NEP), optical efficiency, dynamic range and time constant. The results show that measured TES detectors are close to meeting the requirement of the “Band 3” of SAFARI FTS imaging instrument [1] on the SPICA mission [2].

Item Type:Conference Proceedings
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Morozov, Dr Dmitry
Authors: Morozov, D., Mauskopf, P.D., Ade, P., Bruijn, M., De Korte, P.A.J., Hoevers, H., Ridder, M., Khosropanah, P., Dirks, B., and Gao, J.-R.
Subjects:Q Science > QC Physics
College/School:College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
ISSN:0094-243X
ISBN:9780735407510
Copyright Holders:Copyright © 2009 American Institute of Physics
First Published:First published in The Thirteenth International Workshop on Low Temperature Detectors (Ltd13): 48-51
Publisher Policy:Reproduced in accordance with the publisher copyright policy

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