Title of article :
Light detector development for CRESST II
Author/Authors :
Petricca، نويسنده , , F and Angloher، نويسنده , , G and Cozzini، نويسنده , , C and Frank، نويسنده , , T and Hauff، نويسنده , , D and Ninkovi?، نويسنده , , J and Pr?bst، نويسنده , , F and Seidel، نويسنده , , W and Uchaikin، نويسنده , , S، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2004
Pages :
4
From page :
193
To page :
196
Abstract :
CRESST-II detector modules rely on the ability to actively discriminate electron recoils from nuclear recoils via simultaneous measurement of phonons and scintillation light. The scintillation light produced in each target crystal is detected via an associated calorimeter consisting of a thin silicon wafer read out by a tungsten phase transition thermometer deposited on its surface. About 1% of the energy deposited in CaWO4 is detected as scintillation light; therefore, the sensitivity of the light detector is crucial for the discrimination of electron recoils from nuclear recoils at energies relevant for WIMP searches. We report the detector performance obtained using a thermometer geometry characterized by phonon collectors and a thin film thermal coupling to the heat sink (Fig. 1). This concept allows a high sensitivity by decoupling the area required for the collection of non-thermal phonons and the heat capacity of the sensor. With a 30×30×0.45 mm3 light detector, energy thresholds below 5 keV referred to energy deposition in CaWO4 have been obtained. Results achieved will be presented and an overview on further possibilities of development will be given.
Keywords :
Phonon collectors , Light detector , Dark matter , CaWO4 , Scintillation light
Journal title :
Nuclear Instruments and Methods in Physics Research Section A
Serial Year :
2004
Journal title :
Nuclear Instruments and Methods in Physics Research Section A
Record number :
2201722
Link To Document :
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