Detection of reactor antineutrino coherent scattering off nuclei with a two-phase noble gas detector

TL;DR

This paper proposes a two-phase noble gas detector design capable of detecting reactor antineutrino coherent scattering off nuclei, demonstrating its sensitivity and event identification capabilities using existing technologies.

Contribution

It introduces a novel detector concept based on two-phase xenon and argon with combined optical and ionization readouts for antineutrino detection.

Findings

Detector design shows sufficient sensitivity for antineutrino coherent scattering detection.

Combined optical and ionization readouts improve event identification.

Conceptual design leverages existing technologies for practical implementation.

Abstract

Estimation of the signal amplitudes and counting rates for coherent scattering of reactor antineutrino off atomic nuclei in two-phase xenon and argon detectors has been done. A conceptual design of detector based on the existing technologies and experience has been proposed. It is shown that a condensed xenon/argon two-phase detector possesses the necessary sensitivity for the use in experiment on detection of coherent scattering of the reactor antineutrino off nuclei. It is shown that a two-phase detector with both optical readout by PMTs and ionisation readout by GEM/THGEM possesses superior capability for identification of the events of coherent antineutrino scattering.