Study and realization of SI microcalorimeters for high-resolution spectroscopy

Details Study and realization of SI microcalorimeters for high-resolution spectroscopy Study and realization of SI microcalorimeters for high-resolution spectroscopy

Sep 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994spie.2280..393a&link_type=abstract

Proc. SPIE Vol. 2280, p. 393-404, EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy V, Oswald H. Siegmund; John V. Vallerg

Astronomy and Astrophysics

Astronomy

Scientific paper

We are developing Si-implanted thermistors to realize high resolution microcalorimeters. We plan to use these devices in an experiment for the determination of the neutrino mass. The measure implies the evaluation of the correct end-point energy of a beta spectrum with a calorimetric approach. Our study is devoted to outline the optimum fabrication process concerning performances and reproducibility. For such reasons we have realized Si thermistors with different concentration of dopant impurities and with different implant geometries. Tests are performed between 4.2 and 1.2 K using a pumped helium cryostat, and selected samples are characterized at very low temperatures in a dilution refrigerator. Good reproducibility of the devices is necessary for producing an array of detectors. At the same time suitable electronics are developed to optimize the detectors preamplifiers link: minimization of the parasitic capacitance is necessary to reduce the integration of signal and to maximize the speed response of the detector.

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