Design and tests of high sensitivity NTD Ge thermometers for the Planck-High Frequency Instrument
Abstract
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.
Additional Information
© 2002 American Institute of Physics. Issue Date: 5 February 2002. We thank P. Garoche at Laboratoire de Physique des Solides in Orsay for fruitful discussions. The Symbol experiment is funded by CNES and supported by IAS.Attached Files
Published - PIAaipcp02.pdf
Files
Name | Size | Download all |
---|---|---|
md5:c954f6ca14b83e905afb37f1abfa8279
|
581.2 kB | Preview Download |
Additional details
- Eprint ID
- 27481
- Resolver ID
- CaltechAUTHORS:20111028-093354204
- Centre National d'Études Spatiales (CNES)
- Created
-
2011-11-07Created from EPrint's datestamp field
- Updated
-
2021-11-09Created from EPrint's last_modified field
- Series Name
- AIP Conference Proceedings
- Series Volume or Issue Number
- 605