Dr. Camille Couturier (Laboratoire de Physique Subatomique et de Cosmologie-Grenoble (Grenoble-Alpes University/CNRS))
The directional detection of Dark Matter (DM) proposes to use the existing anisotropy in the angular distribution of the DM-induced recoils in the galactic coordinates to distinguish it from mostly isotropic background. This anisotropy arises naturally from the relative motion of the Solar system within the DM halo. Several techniques have been proposed for a directional detection, including emulsion plates, crystal scintillators, low-pressure gaseous TPCs, columnar recombination in high-pressure gaseous Xenon TPCs, solid-state detectors, DNA-based detectors and graphene-based heterostructures. After a brief review of these strategies, we will discuss the motion of an ion recoiling due to the elastic scattering by a DM particle. Monte-Carlo simulations can be used to emulate this motion in different sensing materials. We propose a new figure of merit to measure the preservation of the initial direction information in a given detecting material, allowing a quantitative comparison of the different directional detection strategies.