Commissioning of TREX-DM, a Low Background Micromegas-based Time Projection Chamber for Low Mass WIMP Detection

Iguaz, F. J.; Luzon, G.; Aznar, F.; Garcia, J. A.; Dafni, T.; Lagraba, A.; Peiro, A.; Irastorza, I. G.; Cebrian, S.; Castel, J. F.; Garcia Garza, J.

Contribution to a conference proceedings/Contribution to a book

PUBDB-2017-00139

Commissioning of TREX-DM, a Low Background Micromegas-based Time Projection Chamber for Low Mass WIMP Detection

Iguaz, F. J. ; Garcia Garza, J. ; Aznar, F. ; Castel, J. F. ; Cebrian, S. ; Dafni, T. ; Garcia, J. A. ; Irastorza, I. G. ; Lagraba, A. ; Luzon, G. ; Peiro, A.

2015
Verlag Deutsches Elektronen-Synchrotron Hamburg
ISBN: 978-3-935702-43-0

Iguaz, F. J. "Commissioning of TREX-DM, a Low Background Micromegas-based Time Projection Chamber for Low Mass WIMP Detection" in Proceedings, 11th Patras Workshop on Axions, WIMPs and WISPs (Axion-WIMP 2015) / Irastorza, Igor G., Redondo, Javier, Carmona, José Manuel, Cebrian, Susana, Dafni, Theopisti, Iguaz, Francisco J., Luzon, Gloria (eds.), Verlag Deutsches Elektronen-Synchrotron : 2015 ; AXION-WIMP 2015 : 11th Patras Workshop on Axions, WIMPs and WISPs, 2015-06-22 - 2015-06-26, Zaragoza
11th Patras Workshop on Axions, WIMPs and WISPs, AXION-WIMP 2015, Zaragoza, Spain, 22 Jun 2015 - 26 Jun 2015 Hamburg : Verlag Deutsches Elektronen-Synchrotron, DESY-PROC 100-103 (2015) [10.3204/DESY-PROC-2015-02/iguaz_francisco]

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Please use a persistent id in citations: doi:10.3204/DESY-PROC-2015-02/iguaz_francisco

Abstract: Dark Matter experiments are recently focusing their detection techniques in low-mass WIMPs, something which requires the use of light elements and low energy threshold. In this context, we describe the TREX-DM experiment, a low background Micromegas-based Time Projection Chamber for low-mass WIMP detection. Its main goal is the operation of an active detection mass $\sim$0.3 kg, with an energy threshold below 0.4~keVee and fully built with previously selected radiopure materials. This work focuses on the commissioning of the actual setup situated in a laboratory on surface. A preliminary background model of the experiment is also presented, based on Geant4 simulations and two discrimination methods: a conservative muon/electron and one based on a $^{252}$Cf source. Based on this model, TREX-DM could be competitive in the search for low mass WIMPs and, in particular, it could be sensitive to the WIMP interpretation of the DAMA/LIBRA hint.

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