Tagging and localisation of ionizing events using NbSi transition edge phonon sensors for Dark Matter searches
arXiv:2303.02067 · doi:10.1103/PhysRevD.108.022006
Abstract
In the context of direct searches of sub-GeV Dark Matter particles with germanium detectors, the EDELWEISS collaboration has tested a new technique to tag ionizing events using NbSi transition edge athermal phonon sensors. The emission of the athermal phonons generated by the Neganov-Trofimov-Luke effect associated with the drift of electrons and holes through the detectors is used to tag ionization events generated in specific parts of the detector localized in front of the NbSi sensor and to reject by more than a factor 5 (at 90% C.L.) the background from heat-only events that dominates the spectrum above 3 keV. This method is able to improve by a factor 2.8 the previous limit on spin-independent interactions of 1 GeV/c2 WIMPs obtained with the same detector and data set but without this tagging technique.
13 pages, 11 figures
References in corpus (9)
- Results from a search for dark matter in the complete LUX exposure
- Dark Matter Results From 54-Ton-Day Exposure of PandaX-II Experiment
- SENSEI: Direct-Detection Constraints on Sub-GeV Dark Matter from a Shallow Underground Run Using a Prototype Skipper-CCD
- EXCESS workshop: Descriptions of rising low-energy spectra
- Performance of the EDELWEISS-III experiment for direct dark matter searches
- Improved EDELWEISS-III sensitivity for low-mass WIMPs using a profile likelihood approach
- DAMIC-M Experiment: Thick, Silicon CCDs to search for Light Dark Matter
- Signals induced by charge-trapping in EDELWEISS FID detectors: analytical modeling and applications
- Measurement of the cosmogenic activation of germanium detectors in EDELWEISS-III