Author/Authors :
Isaila، نويسنده , , C. and Boslau، نويسنده , , O. and Coppi، نويسنده , , C. and Feilitzsch، نويسنده , , J. and Goldstraك، نويسنده , , P. and Jagemann، نويسنده , , T. and Jochum، نويسنده , , J. and Kemmer، نويسنده , , J. and Lachenmaier، نويسنده , , T. and Lanfranchi، نويسنده , , J.-C. and Pahlke، نويسنده , , A. and Potzel، نويسنده , , W. and Rau، نويسنده , , W. and Stark، نويسنده , , M. and Wernicke، نويسنده , , D. and Westphal، نويسنده , , W.، نويسنده ,
Abstract :
For an active suppression of the gamma and electron background in the Cryogenic Rare Event Search with Superconducting Thermometers (CRESST) dark matter experiment both phonons and scintillation light generated in a CaWO4 crystal are detected simultaneously. The phonon signal is read out by a transition edge sensor (TES) on the CaWO4 crystal. For light detection a silicon absorber equipped with a TES is employed. An efficient background discrimination requires very sensitive light detectors. The threshold can be improved by applying an electric field to the silicon crystal leading to an amplification of the thermal signal due to the Neganov–Luke effect. Measurements showing the improved sensitivity of the light detectors as well as future steps for reducing the observed extra noise will be presented.
Keywords :
Cryogenic detectors , Dark matter , CRESST , Neganov–Luke effect
