Large-mass single-electron-resolution detector for dark matter and neutrino elastic interaction searches

Abstract

Large mass single-electron-resolution solid state detectors are desirable to search for low mass dark matter candidates and to measure coherent elastic neutrino nucleus scattering (CE$\nu$NS). Here, we present results from a novel 100 g phonon-mediated Si detector with a new interface architecture. This detector gives a baseline resolution of $\sim 1e^{-}/h^{+}$ pair and a leakage current on the order of $10^{-16}$ A. This was achieved by removing the direct electrical contact between the Si crystal and the metallic electrode, and by increasing the phonon absorption efficiency of the sensors. The phonon signal amplification in the detector shows a linear increase while the signal to noise ratio improves with bias voltage, up to 240 V. This feature enables the detector to operate at a low energy threshold which is beneficial for dark matter and CE$\nu$NS like searches.

arXiv comment6 pages, 5 figures

References in corpus (6)

• Asymmetric Dark Matter
• Searching for Dark Absorption with Direct Detection Experiments
• Low-threshold analysis of CDMS shallow-site data
• Directional Sensitivity In Light-Mass Dark Matter Searches With Single-Electron Resolution Ionization Detectors
• First Constraint on Coherent Elastic Neutrino-Nucleus Scattering in Argon
• Background Studies for the MINER Coherent Neutrino Scattering Reactor Experiment

Cited by in corpus (4)

• First results from a search for coherent elastic neutrino-nucleus scattering (CE$\nu$NS) at a reactor site
• Solar neutrinos and dark matter detection with diurnal modulation
• Development of a large-mass, low-threshold detector system with simultaneous measurements of athermal phonons and scintillation light
• Novel coincidence detection technique for precision measurement of neutron-capture-induced nuclear recoils