The CYGNO experiment aims to build a large ( O(10) m 3 ) directional detector for rare event searches, such as nuclear recoils (NRs) induced by dark matter (DM), such as weakly interactive massive particles (WIMPs). The detector concept comprises a time projection chamber (TPC), filled with a He:CF 4 60/40 scintillating gas mixture at room temperature and atmospheric pressure, equipped with an amplification stage made of a stack of three gas electron multipliers (GEMs) which are coupled to an optical readout. The latter consists in scientific CMOS (sCMOS) cameras and photomultipliers tubes (PMTs). The maximisation of the light yield of the amplification stage plays a major role in the determination of the energy threshold of the experiment. In this paper, we simulate the effect of the addition of a strong electric field below the last GEM plane on the GEM field structure and we experimentally test it by means of a 10 × 10 cm 2 readout area prototype. The experimental measurements analyse stacks of different GEMs and helium concentrations in the gas mixture combined with this extra electric field, studying their performances in terms of light yield, energy resolution and intrinsic diffusion. It is found that the use of this additional electric field permits large light yield increases without degrading intrinsic characteristics of the amplification stage with respect to the regular use of GEMs.
Enhancing the light yield of He:CF4 based gaseous detector / Fernando Domingues Amaro, ; Antonietti, Rita; Baracchini, Elisabetta; Benussi, Luigi; Bianco, Stefano; Campagnola, Roberto; Capoccia, Cesidio; Caponero, Michele; Danilo Santos Cardoso, ; Luan Gomes Mattosinhos de Carvalho, ; Cavoto, Gianluca; Igor Abritta Costa, ; Croce, Antonio; Dané, Emiliano; Dho, Giorgio; Flaminia Di Giambattista, ; DI MARCO, Emanuele; D’Astolfo, Melba; D’Imperio, Giulia; Fiorina, Davide; Iacoangeli, Francesco; Zahoor ul Islam, ; Herman Pessoa Lima Jùnior, ; Kemp, Ernesto; Maccarrone, Giovanni; Rui Daniel Passos Mano, ; Robert Renz Marcelo Gregorio, ; David José Gaspar Marques, ; Mazzitelli, Giovanni; Alasdair Gregor McLean, ; Messina, Andrea; Meloni, Pietro; Cristina Maria Bernardes Monteiro, ; Rafael Antunes Nobrega, ; Igor Fonseca Pains, ; Paoletti, Emiliano; Passamonti, Luciano; Petrucci, Fabrizio; Piacentini, Stefano; Piccolo, Davide; Daniele, Pierluigi; Pinci, Davide; Prajapati, Atul; Renga, Francesco; Rita Joana da Cruz Roque, ; Rosatelli, Filippo; Russo, Alessandro; Joaquim Marques Ferreira dos Santos, ; Saviano, Giovanna; Pedro Alberto Oliveira Costa Silva, ; Neil John Curwen Spooner, ; Tesauro, Roberto; Tomassini, Sandro; Torelli, Samuele. - In: EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS. - ISSN 1434-6052. - 84:10(2024), pp. 1-21. [10.1140/epjc/s10052-024-13471-5]
Enhancing the light yield of He:CF4 based gaseous detector
Rita Antonietti;Elisabetta Baracchini;Luigi Benussi;Stefano Bianco;Gianluca CavotoMembro del Collaboration Group
;Antonio Croce;Emanuele Di Marco;Melba D’Astolfo;Giulia D’Imperio;Francesco Iacoangeli;Andrea Messina;Pietro Meloni;Stefano Piacentini;Daniele Pierluigi;Davide Pinci;Francesco Renga;Giovanna SavianoMembro del Collaboration Group
;Samuele Torelli
2024
Abstract
The CYGNO experiment aims to build a large ( O(10) m 3 ) directional detector for rare event searches, such as nuclear recoils (NRs) induced by dark matter (DM), such as weakly interactive massive particles (WIMPs). The detector concept comprises a time projection chamber (TPC), filled with a He:CF 4 60/40 scintillating gas mixture at room temperature and atmospheric pressure, equipped with an amplification stage made of a stack of three gas electron multipliers (GEMs) which are coupled to an optical readout. The latter consists in scientific CMOS (sCMOS) cameras and photomultipliers tubes (PMTs). The maximisation of the light yield of the amplification stage plays a major role in the determination of the energy threshold of the experiment. In this paper, we simulate the effect of the addition of a strong electric field below the last GEM plane on the GEM field structure and we experimentally test it by means of a 10 × 10 cm 2 readout area prototype. The experimental measurements analyse stacks of different GEMs and helium concentrations in the gas mixture combined with this extra electric field, studying their performances in terms of light yield, energy resolution and intrinsic diffusion. It is found that the use of this additional electric field permits large light yield increases without degrading intrinsic characteristics of the amplification stage with respect to the regular use of GEMs.| File | Dimensione | Formato | |
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