Since many years the Milano Gran Sasso collaboration is developing large mass calorimeters for Double Beta Decay and Dark Matter searches, employing TeO2 crystals as absorber elements. Recently, we have focused our attention on the improvement of the detector resolution: an efficient dumping suspension and the implementation of a new cold electronics device, have strongly suppressed the main sources of noise. The increase in SIN ratio has been of almost an order of magnitude and the resolution achieved is competitive with that of Ge diodes for gamma -rays detection, while a FWHM of 3.2 +/-0.3 keV has been obtained for 5.4 MeV alpha particles, the best result with any kind of detector. (C) 2001 Elsevier Science B.V. All rights reserved
Vanzini, M., Alessandrello, A., Brofferio, C., Bucci, C., Coccia, E., Cremonesi, O., et al. (2001). High-resolution bolometers for rare events detection. NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH. SECTION A, ACCELERATORS, SPECTROMETERS, DETECTORS AND ASSOCIATED EQUIPMENT, 461(1-3), 293-296 [10.1016/S0168-9002(00)01228-6].
High-resolution bolometers for rare events detection
BROFFERIO, CHIARA;Cremonesi, O;FIORINI, ETTORE;NUCCIOTTI, ANGELO ENRICO LODOVICO;PAVAN, MAURA;Pessina, G;Previtali, E;ZANOTTI, LUIGI ERNESTO
2001
Abstract
Since many years the Milano Gran Sasso collaboration is developing large mass calorimeters for Double Beta Decay and Dark Matter searches, employing TeO2 crystals as absorber elements. Recently, we have focused our attention on the improvement of the detector resolution: an efficient dumping suspension and the implementation of a new cold electronics device, have strongly suppressed the main sources of noise. The increase in SIN ratio has been of almost an order of magnitude and the resolution achieved is competitive with that of Ge diodes for gamma -rays detection, while a FWHM of 3.2 +/-0.3 keV has been obtained for 5.4 MeV alpha particles, the best result with any kind of detector. (C) 2001 Elsevier Science B.V. All rights reserved
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