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Low-energy threshold demonstration for dark matter searches in TREX-DM with an $^{37}$Ar source produced at CNA HiSPANoS

Fuente: arXiv

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Bibliographic Details
Main Authors:	Castel, J., Cebrián, S., Dafni, T., Díez-Ibáñez, D., Ezquerro, A., Fernández, B., Galán, J., García, J. A., Guerrero, C., Irastorza, I. G., Luzón, G., Margalejo, C., Mirallas, H., Obis, L., de Solórzano, A. Ortiz, Pérez, O., Porrón, J., Puyuelo, M. J., Quintana, A.
Format:	Preprint
Published:	2025
Subjects:	Instrumentation and Detectors High Energy Physics - Experiment
Online Access:	Acceder al recurso
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_version_	1866918483563905024
author	Castel, J. Cebrián, S. Dafni, T. Díez-Ibáñez, D. Ezquerro, A. Fernández, B. Galán, J. García, J. A. Guerrero, C. Irastorza, I. G. Luzón, G. Margalejo, C. Mirallas, H. Obis, L. de Solórzano, A. Ortiz Pérez, O. Porrón, J. Puyuelo, M. J. Quintana, A.
author_facet	Castel, J. Cebrián, S. Dafni, T. Díez-Ibáñez, D. Ezquerro, A. Fernández, B. Galán, J. García, J. A. Guerrero, C. Irastorza, I. G. Luzón, G. Margalejo, C. Mirallas, H. Obis, L. de Solórzano, A. Ortiz Pérez, O. Porrón, J. Puyuelo, M. J. Quintana, A.
contents	We report on the successful implementation of an $^{37}$Ar calibration source in the TREX-DM detector, a high-pressure time projection chamber designed for low-mass dark matter searches. The $^{37}$Ar source was produced through fast neutron activation of CaO powder at the HiSPANoS facility of Centro Nacional de Aceleradores (CNA) in Spain, yielding $O(1)$ kBq of activity. Using a novel combined GEM-Micromegas readout system, we successfully detected both characteristic emissions from $^{37}$Ar decay (2.82 keV and 270 eV) and achieved unprecedented energy threshold performance in TREX-DM, approaching the single-electron ionization energy of argon.
format	Preprint
id	arxiv_https___arxiv_org_abs_2510_05877
institution	arXiv
publishDate	2025
record_format	arxiv
spellingShingle	Low-energy threshold demonstration for dark matter searches in TREX-DM with an $^{37}$Ar source produced at CNA HiSPANoS Castel, J. Cebrián, S. Dafni, T. Díez-Ibáñez, D. Ezquerro, A. Fernández, B. Galán, J. García, J. A. Guerrero, C. Irastorza, I. G. Luzón, G. Margalejo, C. Mirallas, H. Obis, L. de Solórzano, A. Ortiz Pérez, O. Porrón, J. Puyuelo, M. J. Quintana, A. Instrumentation and Detectors High Energy Physics - Experiment We report on the successful implementation of an $^{37}$Ar calibration source in the TREX-DM detector, a high-pressure time projection chamber designed for low-mass dark matter searches. The $^{37}$Ar source was produced through fast neutron activation of CaO powder at the HiSPANoS facility of Centro Nacional de Aceleradores (CNA) in Spain, yielding $O(1)$ kBq of activity. Using a novel combined GEM-Micromegas readout system, we successfully detected both characteristic emissions from $^{37}$Ar decay (2.82 keV and 270 eV) and achieved unprecedented energy threshold performance in TREX-DM, approaching the single-electron ionization energy of argon.
title	Low-energy threshold demonstration for dark matter searches in TREX-DM with an $^{37}$Ar source produced at CNA HiSPANoS
topic	Instrumentation and Detectors High Energy Physics - Experiment
url	https://arxiv.org/abs/2510.05877