LIME -- a gas TPC prototype for directional Dark Matter search for the CYGNO experiment
Fernando Domingues Amaro, Elisabetta Baracchini, Luigi Benussi,, Stefano Bianco, Cesidio Capoccia, Michele Caponero, Danilo Santos Cardoso,, Gianluca Cavoto, Andr\'e Cortez, Igor Abritta Costa, Emiliano Dan\'e, Giorgio, Dho, Flaminia Di Giambattista, Emanuele Di Marco

TL;DR
The paper presents the development and testing of the LIME gaseous TPC prototype for the CYGNO experiment, aiming at directional dark matter detection with optical readout, including performance evaluation, simulations, and background characterization.
Contribution
It introduces the 50 L LIME prototype, details its performance, simulation models, and background analysis, advancing the development of the CYGNO directional dark matter detector.
Findings
LIME demonstrated stable operation and good energy resolution underground.
Simulations closely matched experimental data, validating detector response models.
Background measurements inform future detector optimization and sensitivity.
Abstract
The CYGNO experiment aims at the development of a large gaseous TPC with GEM-based amplification and an optical readout by means of PMTs and scientific CMOS cameras for 3D tracking down to O(keV) energies, for the directional detection of rare events such as low mass Dark Matter and solar neutrino interactions. The largest prototype built so far towards the realisation of the CYGNO experiment demonstrator is the 50 L active volume LIME, with 4 PMTs and a single sCMOS imaging a 3333 cm\textsuperscript{2} area for 50 cm drift, that has been installed in underground Laboratori Nazionali del Gran Sasso in February 2022. We will illustrate LIME performances as evaluated overground in Laboratori Nazionali di Frascati by means of radioactive X-ray sources, and in particular the detector stability, energy response and energy resolution. We will discuss the MC simulation developed to…
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Taxonomy
TopicsRadiation Detection and Scintillator Technologies · Particle Detector Development and Performance · Nuclear Physics and Applications
