Performance of a SuperCDMS HVeV Detector with Sub-eV Energy Resolution and Single Charge-sensitivity

Abstract

We present a detailed characterization of a new generation of athermal-phonon single-charge sensitive Si HVeV detectors, the best of which achieved 589~meV~$\pm$~5~meV baseline resolution. Our sub-eV energy resolution enables precise measurements of single-photon events and reveal consistent energy losses of 0.92~eV~$\pm$~0.02~eV per charge excitation across two facilities. We demonstrate that the noise for these detectors is well described using a standard Transition Edge Sensor noise model. We also measure a nominal phonon collection efficiency of 45\%~$\pm$~3\%~(stat.)~$\pm$~6\%~(syst.) in the best performing device, establishing these detectors as the most efficient athermal phonon detectors to date, limited only by intrinsic limitations of quasiparticle generation.

17 pages, 11 figures

References in corpus (27)

• First Dark Matter Constraints from a SuperCDMS Single-Charge Sensitive Detector
• Constraints on low-mass, relic dark matter candidates from a surface-operated SuperCDMS single-charge sensitive detector
• EXCESS workshop: Descriptions of rising low-energy spectra
• Searches for light dark matter using condensed matter systems
• Ionization Yield in Silicon for eV-Scale Electron-Recoil Processes
• Thermal detection of single e-h pairs in a biased silicon crystal detector
• Quasiparticle generation efficiency in superconducting thin-films
• Complex impedance, responsivity and noise of transition-edge sensors: analytical solutions for two- and three-block thermal models
• Design and Characterization of a Phonon-Mediated Cryogenic Particle Detector with an eV-Scale Threshold and 100 keV-Scale Dynamic Range
• Characterizing TES Power Noise for Future Single Optical-Phonon and Infrared-Photon Detectors
• Dark Matter Candidates of a Very Low Mass
• Light Dark Matter Constraints from SuperCDMS HVeV Detectors Operated Underground with an Anticoincidence Event Selection
• Investigating the sources of low-energy events in a SuperCDMS-HVeV detector
• G4CMP: Condensed Matter Physics Simulation Using the Geant4 Toolkit
• First measurement of the nuclear-recoil ionization yield in silicon at 100 eV
• Single Electron-Hole Pair Sensitive Silicon Detector with Surface Event Rejection
• First Sub-MeV Dark Matter Search with the QROCODILE Experiment Using Superconducting Nanowire Single-Photon Detectors
• Measuring the Impact Ionization and Charge Trapping Probabilities in SuperCDMS HVeV Phonon Sensing Detectors
• Low Energy Backgrounds and Excess Noise in a Two-Channel Low-Threshold Calorimeter
• Low-Energy Backgrounds in Solid-State Phonon and Charge Detectors
• Improved Modelling of Detector Response Effects in Phonon-based Crystal Detectors used for Dark Matter Searches
• Modeling of Impact Ionization and Charge Trapping in SuperCDMS HVeV Detectors
• Spontaneous generation of athermal phonon bursts within bulk silicon causing excess noise, low energy background events and quasiparticle poisoning in superconducting sensors
• First demonstration of a TES based cryogenic Li${}_2$MoO${}_4$detector for neutrinoless double beta decay search
• Commissioning of the NUCLEUS Experiment at the Technical University of Munich
• Low-Energy Calibration of SuperCDMS HVeV Cryogenic Silicon Calorimeters Using Compton Steps
• CUTE: A Cryogenic Underground TEst Facility at SNOLAB