Background assessment for the TREX Dark Matter experiment

Abstract

TREX-DM is conceived to look for low-mass Weakly Interacting Massive Particles (WIMPs) using a gas Time Projection Chamber equipped with micromegas readout planes at the Canfranc Underground Laboratory. The detector can hold in the active volume 20 l of pressurized gas up to 10 bar, corresponding to 0.30 kg of Ar or 0.16 kg of Ne. The micromegas are read with a self-triggered acquisition, allowing for thresholds below 0.4 keV (electron equivalent). A low background level in the lowest energy region is another essential requirement. To assess the expected background, all the relevant sources have been considered, including the measured fluxes of gamma radiation, muons and neutrons at the Canfranc Laboratory, together with the activity of most of the components used in the detector and ancillary systems, obtained in a complete assay program. The background contributions have been simulated by means of a dedicated application based on Geant4 and a custom-made code for the detector response. The background model developed for the detector presently installed in Canfranc points to levels from 1 to 10 counts keV-1 kg-1 d-1 in the region of interest, making TREX-DM competitive in the search for low-mass WIMPs. A roadmap to further decrease it down to 0.1 counts keV-1 kg-1 d-1 is underway.

Final version, as accepted in Eur. Phys. J. C

References in corpus (47)

• Results from 730 kg days of the CRESST-II Dark Matter Search
• Implication of neutrino backgrounds on the reach of next generation dark matter direct detection experiments
• Final model independent result of DAMA/LIBRA-phase1
• Search for Low-Mass WIMPs with SuperCDMS
• Dark matter direct-detection experiments
• CoGeNT: A Search for Low-Mass Dark Matter using p-type Point Contact Germanium Detectors
• WIMP-Search Results from the Second CDMSlite Run
• Results on light dark matter particles with a low-threshold CRESST-II detector
• Low-Mass Dark Matter Search with CDMSlite
• Results from the first use of low radioactivity argon in a dark matter search
• Search for low-mass WIMPs in a 0.6 kg day exposure of the DAMIC experiment at SNOLAB
• The Majorana Demonstrator Radioassay Program
• Radiogenic and Muon-Induced Backgrounds in the LUX Dark Matter Detector
• The background in the neutrinoless double beta decay experiment GERDA
• Radiopurity of Micromegas readout planes
• Background model for the NaI(Tl) crystals in COSINE-100
• Improved EDELWEISS-III sensitivity for low-mass WIMPs using a profile likelihood approach
• Material radioassay and selection for the XENON1T dark matter experiment
• Background studies for the EDELWEISS dark matter experiment
• ACTIVIA: Calculation of Isotope Production Cross-sections and Yields
• Radiogenic Neutron Yield Calculations for Low-Background Experiments
• Limits on light WIMPs with a 1 kg-scale germanium detector at 160 eVee physics threshold at the China Jinping Underground Laboratory
• Cosmogenic Production as a Background in Searching for Rare Physics Processes
• Optimizing EDELWEISS detectors for low-mass WIMP searches
• Cosmogenic Activation of Materials Used in Rare Event Search Experiments
• Investigation of radioactivity-induced backgrounds in EXO-200
• Radiopurity control in the NEXT-100 double beta decay experiment: procedures and initial measurements
• Assessment of backgrounds of the ANAIS experiment for dark matter direct detection
• Cosmogenic activation of xenon and copper
• Understanding NaI(Tl) crystal background for dark matter searches
• Micromegas-TPC operation at high pressure in xenon-trimethylamine mixtures
• Cosmogenic production of tritium in dark matter detectors
• Calculation of neutron background for underground experiments
• Radiopurity assessment of the tracking readout for the NEXT double beta decay experiment
• TREX-DM: a low-background Micromegas-based TPC for low-mass WIMP detection
• Cosmogenic activation of materials
• Trace radioactive impurities in final construction materials for EXO-200
• Neutron background at the Canfranc Underground Laboratory and its contribution to the IGEX-DM dark matter experiment
• Radioactivity Backgrounds in ZEPLIN-III
• Gaseous time projection chambers for rare event detection: Results from the T-REX project. I. Double beta decay
• A Database for Storing the Results of Material Radiopurity Measurements
• The BiPo-3 detector for the measurement of ultra low natural radioactivities of thin materials
• Radiopurity assessment of the energy readout for the NEXT double beta decay experiment
• Gaseous time projection chambers for rare event detection: Results from the T-REX project. II. Dark matter
• High Energy Activation Data Library (HEAD-2009)
• Radon Daughter Plate-out Measurements at SNOLAB for Polyethylene and Copper
• Radon and material radiopurity assessment for the NEXT double beta decay experiment

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• The TREX-DM experiment at the Canfranc Underground Laboratory
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• Microbulk Micromegas in non-flammable mixtures of argon and neon at high pressure
• Long term measurement of the ${}^{222}$Rn concentration in the Canfranc Underground Laboratory
• The role of small scale experiments in the direct detection of dark matter
• AlphaCAMM, a Micromegas-based camera for high-sensitivity screening of alpha surface contamination
• Small scale direct dark matter search experiments
• Micromegas with GEM preamplification for enhanced energy threshold in low-background gaseous time projection chambers
• State of the Art in Direct Dark Matter Detectors: Technologies, Performance, and Future Directions
• Low-energy threshold demonstration for dark matter searches in TREX-DM with an ${}^{37}$Ar source produced at CNA HiSPANoS