000162232 001__ 162232
000162232 005__ 20251017144631.0
000162232 0247_ $$2doi$$a10.12688/openreseurope.19258.2
000162232 0248_ $$2sideral$$a144770
000162232 037__ $$aART-2025-144770
000162232 041__ $$aeng
000162232 100__ $$0(orcid)0000-0003-3532-7540$$aCastel Pablo, Juan Francisco$$uUniversidad de Zaragoza
000162232 245__ $$aMicromegas with GEM preamplification for enhanced energy threshold in low-background gaseous time projection chambers
000162232 260__ $$c2025
000162232 5060_ $$aAccess copy available to the general public$$fUnrestricted
000162232 5203_ $$aBackground We develop the concept of a Micromegas readout plane with an additional GEM preamplification stage placed a few millimetres above it to increase the maximum effective gain of the combined readout. Methods We implement it and test it in realistic conditions for its application to low-background dark matter searches like the TREX-DM experiment. For this, we use a Micromegas of Microbulk type, built with radiopure materials. Results We report on GEM effective extra gain factors of about 90, 50 and 20 in 1, 4 and 10 bar of Ar-1%iC4H10. These results are obtained in a small test chamber allowing for systematic scanning of voltages and pressures. In addition, a TREX-DM full-scale set-up has also been built and tested, featuring a replica of the fully-patterned TREX-DM Microbulk readout. Conclusions The results here obtained show promise to lower the threshold of the experiment down to 50 eV ee , corresponding to substantially enhanced sensitivity to low-mass WIMPs.
000162232 536__ $$9info:eu-repo/grantAgreement/EC/H2020/101026819/EU/Low background techniques on particle detectors for Rare Event Searches/LOBRES$$9This project has received funding from the European Union’s Horizon 2020 research and innovation program under grant agreement No H2020 101026819-LOBRES$$9info:eu-repo/grantAgreement/EC/H2020/788781/EU/Towards the detection of the axion with the International Axion Observatory/IAXOplus$$9This project has received funding from the European Union’s Horizon 2020 research and innovation program under grant agreement No H2020 788781-IAXOplus$$9info:eu-repo/grantAgreement/ES/MICINN/PID2019-108122GB-C31$$9info:eu-repo/grantAgreement/ES/MICINN/PID2022-137268NB-C51
000162232 540__ $$9info:eu-repo/semantics/openAccess$$aby$$uhttps://creativecommons.org/licenses/by/4.0/deed.es
000162232 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/publishedVersion
000162232 700__ $$0(orcid)0000-0002-6948-5101$$aCebrián Guajardo, Susana$$uUniversidad de Zaragoza
000162232 700__ $$0(orcid)0000-0002-8921-910X$$aDafni, Theopisti$$uUniversidad de Zaragoza
000162232 700__ $$aDíez Ibáñez, David$$uUniversidad de Zaragoza
000162232 700__ $$0(orcid)0000-0001-7529-9834$$aGalán Lacarra, Javier
000162232 700__ $$0(orcid)0000-0002-7399-7353$$aGarcía Pascual, Juan Antonio$$uUniversidad de Zaragoza
000162232 700__ $$0(orcid)0009-0001-8374-6128$$aEzquerro Sastre, Álvaro$$uUniversidad de Zaragoza
000162232 700__ $$0(orcid)0000-0003-1163-1687$$aGarcía Irastorza, Igor$$uUniversidad de Zaragoza
000162232 700__ $$0(orcid)0000-0002-5352-1884$$aLuzón Marco, Gloria$$uUniversidad de Zaragoza
000162232 700__ $$0(orcid)0000-0001-6213-5590$$aMargalejo Blasco, Cristina$$uUniversidad de Zaragoza
000162232 700__ $$0(orcid)0000-0002-9951-8680$$aMirallas Sánchez, Héctor$$uUniversidad de Zaragoza
000162232 700__ $$0(orcid)0000-0002-7990-2060$$aObis Aparicio, Luis
000162232 700__ $$0(orcid)0000-0001-8278-6032$$aOrtiz de Solórzano, Alfonso$$uUniversidad de Zaragoza
000162232 700__ $$aPérez Lázaro, Óscar$$uUniversidad de Zaragoza
000162232 700__ $$aPorrón Lafuente, Jorge$$uUniversidad de Zaragoza
000162232 700__ $$0(orcid)0009-0005-7060-5341$$aJiménez Puyuelo, María$$uUniversidad de Zaragoza
000162232 7102_ $$12004$$2X$$aUniversidad de Zaragoza$$bDpto. Física Teórica$$cProy. investigación HCA
000162232 7102_ $$12004$$2390$$aUniversidad de Zaragoza$$bDpto. Física Teórica$$cÁrea Física Atóm.Molec.y Nucl.
000162232 773__ $$g5 (2025), 53$$tOpen Research Europe$$x2732-5121
000162232 8564_ $$s3920284$$uhttps://zaguan.unizar.es/record/162232/files/texto_completo.pdf$$yVersión publicada
000162232 8564_ $$s1720040$$uhttps://zaguan.unizar.es/record/162232/files/texto_completo.jpg?subformat=icon$$xicon$$yVersión publicada
000162232 909CO $$ooai:zaguan.unizar.es:162232$$particulos$$pdriver
000162232 951__ $$a2025-10-17-14:26:24
000162232 980__ $$aARTICLE