Performance of the EDELWEISS-III experiment for direct dark matter searches

Abstract

We present the results of measurements demonstrating the efficiency of the EDELWEISS-III array of cryogenic germanium detectors for direct dark matter searches. The experimental setup and the FID (Fully Inter-Digitized) detector array is described, as well as the efficiency of the double measurement of heat and ionization signals in background rejection. For the whole set of 24 FID detectors used for coincidence studies, the baseline resolutions for the fiducial ionization energy are mainly below 0.7 keV${}_{ee}$ (FHWM) whereas the baseline resolutions for heat energies are mainly below 1.5 keV${}_{ee}$ (FWHM). The response to nuclear recoils as well as the very good discrimination capability of the FID design has been measured with an AmBe source. The surface $\beta$- and $\alpha$-decay rejection power of $R_{\mathrm{surf}}<4\times 10^{-5}$ per $\alpha$ at 90% C.L. has been determined with a ${}^{210}$Pb source, the rejection of bulk $\gamma$-ray events has been demonstrated using $\gamma$-calibrations with ${}^{133}$Ba sources leading to a value of $R_{\gamma -\mathrm{mis}-\mathrm{fid}}<2.5\times 10^{-6}$ at 90% C.L.. The current levels of natural radioactivity measured in the detector array are shown as the rate of single $\gamma$ background. The fiducial volume fraction of the FID detectors has been measured to a weighted average value of $(74.6\pm 0.4)\%$ using the cosmogenic activation of the ${}^{65}$Zn and ${}^{68,71}$Ge isotopes. The stability and uniformity of the detector response is also discussed. The achieved resolutions, thresholds and background levels of the upgraded EDELWEISS-III detectors in their setup are thus well suited to the direct search of WIMP dark matter over a large mass range.

References in corpus (13)

• Dark Matter Candidates from Particle Physics and Methods of Detection
• First Dark Matter Results from the XENON100 Experiment
• The Large Underground Xenon (LUX) Experiment
• First Results from the DarkSide-50 Dark Matter Experiment at Laboratori Nazionali del Gran Sasso
• Commissioning Run of the CRESST-II Dark Matter Search
• Improved EDELWEISS-III sensitivity for low-mass WIMPs using a profile likelihood approach
• Muon-induced background in the EDELWEISS dark matter search
• Optimizing EDELWEISS detectors for low-mass WIMP searches
• Measurement of the response of heat-and-ionization germanium detectors to nuclear recoils
• PandaX: A Liquid Xenon Dark Matter Experiment at CJPL
• Monitoring of the thermal neutron flux in the LSM underground laboratory
• Signals induced by charge-trapping in EDELWEISS FID detectors: analytical modeling and applications
• Measurement of the cosmogenic activation of germanium detectors in EDELWEISS-III

Cited by in corpus (32)

• Searching for low-mass dark matter particles with a massive Ge bolometer operated above-ground
• EXCESS workshop: Descriptions of rising low-energy spectra
• Low background techniques in bolometers for double-beta decay search
• Optimizing EDELWEISS detectors for low-mass WIMP searches
• Direct Detection of Dark Matter -- APPEC Committee Report
• Disentangling the sources of ionizing radiation in superconducting qubits
• Transition Edge Sensors: Physics and Applications
• Ultra-low radioactivity Kapton and copper-Kapton laminates
• Dark Matter Direct Detection of Classical WIMPs
• Mineral Detection of Neutrinos and Dark Matter. A Whitepaper
• Results from a Prototype TES Detector for the Ricochet Experiment
• Ionization yield measurement in a germanium CDMSlite detector using photo-neutron sources
• Phonon-mediated crystal detectors with metallic film coating capable of rejecting $\alpha$ and $\beta$ events induced by surface radioactivity
• A new ultra low-level HPGe activity counting setup in the Felsenkeller shallow-underground laboratory
• The background model of the CUPID-Mo $0\nu \beta \beta$ experiment
• The Phonon Background from Gamma Rays in Sub-GeV Dark Matter Detectors
• A first test of CUPID prototypal light detectors with NTD-Ge sensors in a pulse-tube cryostat
• Twelve-crystal prototype of Li${}_2$MoO${}_4$ scintillating bolometers for CUPID and CROSS experiments
• Development of data processing and analysis pipeline for the RICOCHET experiment
• Abatement of Ionizing Radiation for Superconducting Quantum Devices
• Low-Energy Backgrounds in Solid-State Phonon and Charge Detectors
• QUEST-DMC: Background Modelling and Resulting Heat Deposit for a Superfluid Helium-3 Bolometer
• ALETHEIA: Hunting for Low-mass Dark Matter with Liquid Helium TPCs
• The DAMIC-M Low Background Chamber
• Simultaneous scintillation light and charge readout of a pure argon filled Spherical Proportional Counter
• Neutron spectroscopy with a high-pressure nitrogen-filled spherical proportional counter
• Characterization of the phonon sensor of the CRYOSEL detector with IR photons
• Tagging and localisation of ionizing events using NbSi transition edge phonon sensors for Dark Matter searches
• Precision pulse shape simulation for proton detection at the Nab experiment
• Dark Matter phenomenology : from simplified WIMP models to refined alternative solutions
• Nuclear Recoil Identification in a Scientific Charge-Coupled Device
• HEMT-based 1K front-end electronics for the heat and ionization Ge CryoCube of the future RICOCHET CE$\nu$NS experiment