NDLI: High stability measurement system for the Olimpo IR calibration source

Content Provider	IEEE Xplore Digital Library
Author	Fesquet, M. Abbon, P. Yvon, D. Delbart, A.
Copyright Year	2005
Description	Author affiliation: CEA, Centre d'Etudes Nucleaires de Saclay, Gif-sur-Yvette, France (Fesquet, M.; Abbon, P.; Yvon, D.; Delbart, A.)
Abstract	A specific on-board electronic system has been developed for driving the infra red source calibration of the balloon-borne Olimpo. This system operates at ambient temperature, whereas the source is located on the 2K stage of the cryostat. This electronic system first generates a heating signal on the iridium strip of the source, and then monitors the source temperature stability by several measurements of an NbSi thermometer which is located under the source. Priority in the design was to achieve a high stability measurement, with low heating perturbations of the source, and with a large temperature range of the electronics. The design merges a modulated bias system, with a low noise voltage differential amplifier, and a digital acquisition. The whole system is driven by a microcontroller whose algorithm was optimized to minimize the noise perturbations. Electronic components have been selected for their large temperature operation range, and for their low temperature sensitivity. Moreover, the electronic system is designed to compensate the thermal deviation of the components. The system has been tested successfully with simulated and real IR source for several temperatures. With 600 pW of total sensor dissipation injected during 40 ms, the measurement standard deviation achieved for the resistive value of a 10 k/spl Omega/ thermometer reaches 0.5 /spl Omega/ (48 ppm). Moreover the sensitivity of the electronic for the measurement is of 25 ppm//spl deg/C ranging from -60/spl deg/C to +20/spl deg/C, in agreement with the specifications.
Starting Page	357
Ending Page	361
File Size	446519
Page Count	5
File Format	PDF
ISBN	0780392213
ISSN	10957863
DOI	10.1109/NSSMIC.2005.1596270
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2005-10-23
Publisher Place	Puerto Rico
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Calibration Temperature distribution Temperature sensors Heating Signal generators Strips Thermal stability Digital modulation Low voltage Differential amplifiers
Content Type	Text
Resource Type	Article

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