A Geant4-based Monte Carlo package named G4DS has been developed to simulate the response of DarkSide-50, an experiment operating since 2013 at LNGS, designed to detect WIMP interactions in liquid argon. In the process of WIMP searches, DarkSide-50 has achieved two fundamental milestones: the rejection of electron recoil background with a power of ~107, using the pulse shape discrimination technique, and the measurement of the residual 39Ar contamination in underground argon, ~3 orders of magnitude lower with respect to atmospheric argon. These results rely on the accurate simulation of the detector response to the liquid argon scintillation, its ionization, and electron-ion recombination processes. This work provides a complete overview of the DarkSide Monte Carlo and of its performance, with a particular focus on PARIS, the custom-made liquid argon response model.

Simulation of argon response and light detection in the DarkSide-50 dual phase TPC

Bocci, Maurizio;Bossa, M.;Budano, Antonio;Cariello, Annunziata;Catalanotti, Sergio;Cataudella, Vittorio;Covone, G.;DE CANDIA, Antonio;De Filippis, G.;De Rosa, G.;Fiorillo, Giuliana;Giagu, S.;Korga, G.;Longo, G.;Mandarano, Marina;Monte, A.;Orsini, M.;Rescigno, M.;Romani, Pierpaolo;Rossi, B.;Rossi, N.;Schlitzer, Francesca;Suvorov, Y.;Tonazzo, Alessandra;Trinchese, P.;Walker, S.;Zhu, Jun;
2017

Abstract

A Geant4-based Monte Carlo package named G4DS has been developed to simulate the response of DarkSide-50, an experiment operating since 2013 at LNGS, designed to detect WIMP interactions in liquid argon. In the process of WIMP searches, DarkSide-50 has achieved two fundamental milestones: the rejection of electron recoil background with a power of ~107, using the pulse shape discrimination technique, and the measurement of the residual 39Ar contamination in underground argon, ~3 orders of magnitude lower with respect to atmospheric argon. These results rely on the accurate simulation of the detector response to the liquid argon scintillation, its ionization, and electron-ion recombination processes. This work provides a complete overview of the DarkSide Monte Carlo and of its performance, with a particular focus on PARIS, the custom-made liquid argon response model.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11588/694001
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