A novel nuclear recoil calibration for liquid noble gas detectors

Abstract

According to many dark matter models, a potential signal registered in a detector would feature a single-scattering nuclear recoil (NR). So, it is crucial to calibrate the detector's response to NR events. The conventional calibrations implement $\sim$ keV to MeV neutrons, which can be produced by an accelerator, a neutron generator, or a radioactive source. Although the calibrating methods have been widely employed, they could be improved in several ways: (a) the incident neutron energy should be more monoenergetic, (b) the calibrating NR energy should line up with the region of interest (ROI) of the experiment, and (c) the intensity of the beam should be appropriate. In the paper, we introduce a novel NR calibration method for liquid helium detectors, in which a helium beam ($\alpha$ particles) will be implemented to calibrate the detectors. The helium beam can (i) be tuned precisely to have a jitter of $\lesssim$ 4\% (the $\alpha$ beam's kinetic energy is equivalent to the recoil energy in the conventional calibrations with fast neutrons); (ii) have an energy between $\sim$ 100 eV and tens of keV; and (iii) provide a tunable flux from nA to 100 $\mu$A, which presents convenience in beam pipe configuration to obtain a $\sim$ 100 Hz events rate so that the events pileup would be ignorable.

References in corpus (19)

• First Dark Matter Search Results from the LUX-ZEPLIN (LZ) Experiment
• Implication of neutrino backgrounds on the reach of next generation dark matter direct detection experiments
• Fog on the horizon: a new definition of the neutrino floor for direct dark matter searches
• Magnetic Trapping of Neutrons
• A Path to the Direct Detection of sub-GeV Dark Matter Using Calorimetric Readout of a Superfluid ${}^4$He Target
• A Concept for A Dark Matter Detector Using Liquid Helium-4
• SICANE: a Detector Array for the Measurement of Nuclear Recoil Quenching Factors using Monoenergetic Neutron Beam
• Direct measurement of the ionization quenching factor of nuclear recoils in germanium in the keV energy range
• Dark Matter Detection Using Helium Evaporation and Field Ionization
• Effect of an electric field on superfluid helium scintillation produced by alpha-particle sources
• Characterization of a Deuterium-Deuterium Plasma Fusion Neutron Generator
• Proposed low-energy absolute calibration of nuclear recoils in a dual-phase noble element TPC using D-D neutron scattering kinematics
• A measurement of the ionization efficiency of nuclear recoils in silicon
• An apparatus for studying electrical breakdown in liquid helium at 0.4 K and testing electrode materials for the SNS nEDM experiment
• Scintillation yield from electronic and nuclear recoils in superfluid ${}^4$He
• Measurements of the ionization efficiency of protons in methane
• Effect of an electric field on liquid helium scintillation produced by fast electrons
• ALETHEIA: Hunting for Low-mass Dark Matter with Liquid Helium TPCs
• Coating $\mu$m TPB on a cylindrical detector and studying the sample films being cooled to LN and LHe temperatures