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Superconducting bolometer array with SQUID readout for submillimetre wavelength detection

T May1, V Zakosarenko2, R Boucher2, E Kreysa3 and H-G Meyer2

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We have tested a fully microfabricated superconducting bolometer array for astrophysical observations at submillimetre wavelengths. The system is cooled by a 3He sorption refrigerator operating in a pumped 4He cryostat. The transition edge bolometer uses a bilayer of molybdenum and a gold–palladium alloy with a transition temperature of around 500 mK as the thermometer. The bolometer is voltage biased, and the current is measured by a superconducting quantum interference device (SQUID) ammeter.


PACS

85.25.Dq Superconducting quantum interference devices (SQUIDs)

74.10.+v Occurrence, potential candidates

74.78.-w Superconducting films and low-dimensional structures

85.25.Pb Superconducting infrared, submillimeter and millimeter wave detectors

85.25.Hv Superconducting logic elements and memory devices; microelectronic circuits

Subjects

Superconductivity

Dates

Issue 12 (December 2003)

Received 17 July 2003

Published 5 November 2003



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