Thermistors and Electronics for Use with Cryogenic Microcalorimeters
Abstract
Particle detection microcalorimeters require thermistors with an optimal resistance and high sensitivity in the 100 mK temperature range. We have constructed phosphorus doped silicon and gold:germanium (Au_xGe_1-x x≈0.1) thermistors. In our experience, the Au_xGe_1-x devices have proven to be more reliable and have more reproducible resistance versus temperature curves. Thermistor performance and calorimetry were measured with both single and dual symmetric biasing circuits. We report the relative performance of these circuits and the associated signal amplifiers. We also discuss low temperature shielding and thermal anchoring concerns associated with the microcalorimeter and the preamplifiers.
- Publication:
-
APS Division of Nuclear Physics Meeting Abstracts
- Pub Date:
- October 1996
- Bibcode:
- 1996APS..DNP..AE13J