Simultaneous measurement of thermal and ionization signals in a 60 g cryogenic germanium detector

Author

Barnes, P.D., Jr. ; Da Silva, A. ; Ellman, B. ; Emes, J. ; Haller, E.E. ; Lange, A.E. ; Ing, K. ; Ross, R.R. ; Sadoulet, B. ; Shutt, T. ; Smith, G. ; Stubbs, C. ; Wang, N. ; White, S. ; Yvon, D.

Author_Institution

Dept. of Phys., California Univ., Berkeley, CA, USA

Volume

39

Issue

5

fYear

1992

fDate

10/1/1992 12:00:00 AM

Firstpage

1237

Lastpage

1241

Abstract

The authors present results from a cryogenic detector instrumented to measure both the photon and ionization signals. The detector was a 60-g Ge disk operated at 30 mK. They have made significant improvements in the electronics noise, threshold, and energy resolution of the device. The baseline FWHM, corresponding to the total system noise, was 1.55 keV in the phonon channel and 1.59 keV in the ionization channel. At 60 keV the FWHM were 1.9 keV and 1.7 keV in the phonon and ionization channels, respectively. A discrimination between electron recoils and nuclear recoils at low energy was demonstrated

Keywords

cryogenics; elemental semiconductors; germanium; semiconductor counters; 60-g Ge disk; Ge; baseline FWHM; cryogenic detector; electron recoils; electronics noise; energy resolution; ionization channel; ionization signals; nuclear recoils; phonon channel; photon signals; thermal signals; threshold; total system noise; Cryogenics; Detectors; Electromagnetic scattering; Electrons; Energy resolution; Extraterrestrial measurements; Germanium; Ionization; Particle scattering; Phonons;

fLanguage

English

Journal_Title

Nuclear Science, IEEE Transactions on

Publisher

ieee

ISSN

0018-9499

Type

jour

DOI

10.1109/23.173183

Filename

173183