MIMAC low energy electron-recoil discrimination measured with fast neutrons

Abstract

MIMAC (MIcro-TPC MAtrix of Chambers) is a directional WIMP Dark Matter detector project. Direct dark matter experiments need a high level of electron/recoil discrimination to search for nuclear recoils produced by WIMP-nucleus elastic scattering. In this paper, we proposed an original method for electron event rejection based on a multivariate analysis applied to experimental data acquired using monochromatic neutron fields. This analysis shows that a $10^5$ rejection power is reachable for electron/recoil discrimination. Moreover, the efficiency was estimated by a Monte-Carlo simulation showing that a 105 electron rejection power is reached with a $86.49\pm 0.17$\% nuclear recoil efficiency considering the full energy range and $94.67\pm 0.19$\% considering a 5~keV lower threshold.

arXiv comment27 pages, 20 figures

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Cited by in corpus (10)

• The CYGNO Experiment
• Reconstructing the three-dimensional local dark matter velocity distribution
• Solar axions in large extra dimensions
• Performance of an optically read out time projection chamber with ultra-relativistic electrons
• Fast neutron spectroscopy from 1 MeV up to 15 MeV with Mimac-FastN, a mobile and directional fast neutron spectrometer
• Measurement of directional range components of nuclear recoil tracks in a fiducialised dark matter detector
• Dark Matter Directionality Detection performance of the Micromegas-based $\mu$TPC-MIMAC detector
• The effect of hydrodynamical simulation inspired dark matter velocity profile on directional detection of dark matter
• Observables for Recoil Identification in High-Definition Gas Time Projection Chambers
• Directionality and head-tail recognition in the keV-range with the MIMAC detector by deconvolution of the ionic signal