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Searching for WIMPs with TREX-DM: achievements and challenges by Castel, Juan F.; Cebrián, Susana; Dafni, Theopisti; Díez-Ibáñez, David; Ezquerro, Álvaro; Galán, Javier; García, Juan Antonio; Irastorza, Igor G.; Jiménez, María; Luzón, Gloria; Margalejo, Cristina; de Mira, Ángel; Mirallas, Hector; Obis, Luis; de Solórzano, Alfonso Ortiz; Pérez, Oscar; Ruz, Jaime; Vogel, Julia is a scholarly article available to read on EtoBox.

What is Searching for WIMPs with TREX-DM: achievements and challenges about?

The TREX-DM detector, a low background chamber with microbulk Micromegas readout, was commissioned in the underground laboratory of Canfranc (LSC) in 2018. Since then, data taking campaigns have been carried out with Argon and Neon mixtures, at different pressures from 1 to 4 bar. By achieving a low energy threshold of 1 keV$_{ee}$ and a background level of 80 counts keV$^{-1}$ Kg$^{-1}$ day$^{-1}$ in the region from 1 to 7 keV$_{ee}$, the experiment demonstrates its potential to search for low-mass WIMPs. Two of the most important challenges currently faced are the reduction of both, background level and energy threshold. With respect to the energy threshold, recently a new readout plane is being developed, based on the combination of Micromegas and GEM technologies, aiming to have a pre-amplification stage that would permit very low energy thresholds, close to the single-electron ionization energy. With respect to the background reduction, apart from studies to identify and minimize contamination population, a high sensitivity alpha detector is being developed in order to allow a proper material selection for the TREX-DM detector components. Both challenges, together with the opt

Author

Castel, Juan F.; Cebrián, Susana; Dafni, Theopisti; Díez-Ibáñez, David; Ezquerro, Álvaro; Galán, Javier; García, Juan Antonio; Irastorza, Igor G.; Jiménez, María; Luzón, Gloria; Margalejo, Cristina; de Mira, Ángel; Mirallas, Hector; Obis, Luis; de Solórzano, Alfonso Ortiz; Pérez, Oscar; Ruz, Jaime; Vogel, Julia

Published

2023

Language

EN