Physics
Scientific paper
Feb 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aipc..605...79p&link_type=abstract
LOW TEMPERATURE DETECTORS: Ninth International Workshop on Low Temperature Detectors. AIP Conference Proceedings, Volume 605, p
Physics
3
Photoconductors And Bolometers
Scientific paper
The High Frequency Instrument of Planck needs high sensitivity semi-conductors at low temperature to monitor the temperature of the bolometer plate. We have modeled such thermometers by using a semi-analytical approach of Anderson insulators, taking into account both the electrical field and the electron/phonon decoupling effects. The optimized design uses convenient NTD Ge material and has larger dimension than the initial design. The first measurements of these optimized thermometers showed a significant thermal de-coupling effect due to Kapitza resistance with its mechanical support. Nevertheless, a sensitivity of about 8 nK.Hz-0.5, not far from the predicted one, was obtained. The noise spectrum of the thermometer was flat down to 1 Hz, dominated at lower frequency by the thermal fluctuations. .
Beeman Jeffrey W.
Bhatia Ravinder S.
Crussaire Jean-Pierre
Lamarre Jean-Michel
Langlet F.
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