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Proceedings Paper

New readout system optimized for the Planck Surveyor bolometric instrument
Author(s): Siegfried Gaertner; Alain Benoit; Michel Piat
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Paper Abstract

We have developed a new readout system for bolometers optimized for the Planck Surveyor experiment, a satellite mission dedicated to survey the Cosmological Microwave Background. The bolometer resistance is measured in a bridge with a capacitance load, using a periodic square wave bias current in order to remove the 1/f noises of the electronics. The use of a capacitance allows to reduce the transient signal and to get rid of the Johnson noise. The bias voltages are fully controlled by computer, and the lock-in detection is digital. This system has been implemented and successfully tested on the Diabolo ground- based astronomical experiment. Using the advantages of our readout system, we have built and fully tested an engineering model of the space qualifiable electronics which fulfills the scientific and technical requirements of the Planck Surveyor bolometric instrument: low noise system down to 0.1 Hz, electrical power consumption lower than 40 Watts and volume lower than 15 liters. Our presentation will consist in a full description of this readout system and a review of the current test results. Our system could also be adapted, with some modifications, to other space born instruments which use bolometers.

Paper Details

Date Published: 21 August 1998
PDF: 10 pages
Proc. SPIE 3354, Infrared Astronomical Instrumentation, (21 August 1998); doi: 10.1117/12.317245
Show Author Affiliations
Siegfried Gaertner, Ctr. d'Etude Spatiale de Rayonnements (France)
Alain Benoit, Ctr. de Recherche sur Tres Basses Temperatures (France)
Michel Piat, Univ. Paris XI (France)

Published in SPIE Proceedings Vol. 3354:
Infrared Astronomical Instrumentation
Albert M. Fowler, Editor(s)

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