MIMAC low energy electron-recoil discrimination measured with fast neutrons

Autor:	Riffard, Q., Santos, D., Guillaudin, O., Bosson, G., Bourrion, O., Bouvier, J., Descombes, T., Muraz, J. -F., Lebreton, L., Maire, D., Colas, P., Giomataris, I., Busto, J., Fouchez, D., Brunner, J., Tao, C.
Rok vydání:	2016
Předmět:	Astrophysics - Instrumentation and Methods for Astrophysics Physics - Instrumentation and Detectors
Druh dokumentu:	Working Paper
DOI:	10.1088/1748-0221/11/08/P08011
Popis:	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 $94.67\pm0.19$\% considering a 5~keV lower threshold. Comment: 27 pages, 20 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1602.01738 Zobrazit plný text záznamu View this record from Arxiv