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 105 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±0.17\% nuclear recoil efficiency considering the full energy range and 94.67±0.19\% considering a 5~keV lower threshold.
@article{arxiv.1602.01738,
title = {MIMAC low energy electron-recoil discrimination measured with fast neutrons},
author = {Q. Riffard and D. Santos and O. Guillaudin and G. Bosson and O. Bourrion and J. Bouvier and T. Descombes and J. -F. Muraz and L. Lebreton and D. Maire and P. Colas and I. Giomataris and J. Busto and D. Fouchez and J. Brunner and C. Tao},
journal= {arXiv preprint arXiv:1602.01738},
year = {2016}
}