21 August 1998 New readout system optimized for the Planck Surveyor bolometric instrument
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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.
© (1998) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Siegfried Gaertner, Alain Benoit, Michel Piat, "New readout system optimized for the Planck Surveyor bolometric instrument", Proc. SPIE 3354, Infrared Astronomical Instrumentation, (21 August 1998); doi: 10.1117/12.317245; https://doi.org/10.1117/12.317245
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