Micromegas with GEM preamplification for enhanced energy threshold in low-background gaseous time projection chambers [version 2; peer review: 2 approved]
Background 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-backg...
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F1000 Research Ltd
2025-03-01
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| Online Access: | https://open-research-europe.ec.europa.eu/articles/5-53/v2 |
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| author | Óscar Pérez Lázaro Igor García Irastorza Héctor Mirallas Sánchez Susana Cebrián Guajardo Theopisti Dafni Gloria Luzón Marco Juan Antonio García Pascual Juan Francisco Castel Pablo Javier Galán Lacarra David Díez Ibáñez Alfonso Ortiz de Solórzano Álvaro Ezquerro Sastre Luis Obis Aparicio María Jiménez Puyuelo Jorge Porrón Lafuente Cristina Margalejo Blasco |
| author_facet | Óscar Pérez Lázaro Igor García Irastorza Héctor Mirallas Sánchez Susana Cebrián Guajardo Theopisti Dafni Gloria Luzón Marco Juan Antonio García Pascual Juan Francisco Castel Pablo Javier Galán Lacarra David Díez Ibáñez Alfonso Ortiz de Solórzano Álvaro Ezquerro Sastre Luis Obis Aparicio María Jiménez Puyuelo Jorge Porrón Lafuente Cristina Margalejo Blasco |
| author_sort | Óscar Pérez Lázaro |
| collection | DOAJ |
| description | Background 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. |
| format | Article |
| id | doaj-art-c07679ca7c4e4cc498943206b693af8b |
| institution | Kabale University |
| issn | 2732-5121 |
| language | English |
| publishDate | 2025-03-01 |
| publisher | F1000 Research Ltd |
| record_format | Article |
| series | Open Research Europe |
| spelling | doaj-art-c07679ca7c4e4cc498943206b693af8b2025-08-20T03:43:00ZengF1000 Research LtdOpen Research Europe2732-51212025-03-01510.12688/openreseurope.19258.221540Micromegas with GEM preamplification for enhanced energy threshold in low-background gaseous time projection chambers [version 2; peer review: 2 approved]Óscar Pérez Lázaro0https://orcid.org/0009-0000-2498-0806Igor García Irastorza1https://orcid.org/0000-0003-1163-1687Héctor Mirallas Sánchez2Susana Cebrián Guajardo3https://orcid.org/0000-0002-6948-5101Theopisti Dafni4https://orcid.org/0000-0002-8921-910XGloria Luzón Marco5Juan Antonio García Pascual6Juan Francisco Castel Pablo7Javier Galán Lacarra8David Díez Ibáñez9Alfonso Ortiz de Solórzano10Álvaro Ezquerro Sastre11Luis Obis Aparicio12María Jiménez Puyuelo13Jorge Porrón Lafuente14https://orcid.org/0009-0005-0331-4800Cristina Margalejo Blasco15Center for Astroparticles and High Energy Physics (CAPA), University of Zaragoza, Zaragoza, Aragon, SpainCenter for Astroparticles and High Energy Physics (CAPA), University of Zaragoza, Zaragoza, Aragon, SpainCenter for Astroparticles and High Energy Physics (CAPA), University of Zaragoza, Zaragoza, Aragon, SpainCenter for Astroparticles and High Energy Physics (CAPA), University of Zaragoza, Zaragoza, Aragon, SpainCenter for Astroparticles and High Energy Physics (CAPA), University of Zaragoza, Zaragoza, Aragon, SpainCenter for Astroparticles and High Energy Physics (CAPA), University of Zaragoza, Zaragoza, Aragon, SpainCenter for Astroparticles and High Energy Physics (CAPA), University of Zaragoza, Zaragoza, Aragon, SpainCenter for Astroparticles and High Energy Physics (CAPA), University of Zaragoza, Zaragoza, Aragon, SpainCenter for Astroparticles and High Energy Physics (CAPA), University of Zaragoza, Zaragoza, Aragon, SpainCenter for Astroparticles and High Energy Physics (CAPA), University of Zaragoza, Zaragoza, Aragon, SpainCenter for Astroparticles and High Energy Physics (CAPA), University of Zaragoza, Zaragoza, Aragon, SpainCenter for Astroparticles and High Energy Physics (CAPA), University of Zaragoza, Zaragoza, Aragon, SpainCenter for Astroparticles and High Energy Physics (CAPA), University of Zaragoza, Zaragoza, Aragon, SpainCenter for Astroparticles and High Energy Physics (CAPA), University of Zaragoza, Zaragoza, Aragon, SpainCenter for Astroparticles and High Energy Physics (CAPA), University of Zaragoza, Zaragoza, Aragon, SpainCenter for Astroparticles and High Energy Physics (CAPA), University of Zaragoza, Zaragoza, Aragon, SpainBackground 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.https://open-research-europe.ec.europa.eu/articles/5-53/v2Dark Matter WIMPs Time Projection Chamber Micromegas Underground Science Low Background Techniqueseng |
| spellingShingle | Óscar Pérez Lázaro Igor García Irastorza Héctor Mirallas Sánchez Susana Cebrián Guajardo Theopisti Dafni Gloria Luzón Marco Juan Antonio García Pascual Juan Francisco Castel Pablo Javier Galán Lacarra David Díez Ibáñez Alfonso Ortiz de Solórzano Álvaro Ezquerro Sastre Luis Obis Aparicio María Jiménez Puyuelo Jorge Porrón Lafuente Cristina Margalejo Blasco Micromegas with GEM preamplification for enhanced energy threshold in low-background gaseous time projection chambers [version 2; peer review: 2 approved] Open Research Europe Dark Matter WIMPs Time Projection Chamber Micromegas Underground Science Low Background Techniques eng |
| title | Micromegas with GEM preamplification for enhanced energy threshold in low-background gaseous time projection chambers [version 2; peer review: 2 approved] |
| title_full | Micromegas with GEM preamplification for enhanced energy threshold in low-background gaseous time projection chambers [version 2; peer review: 2 approved] |
| title_fullStr | Micromegas with GEM preamplification for enhanced energy threshold in low-background gaseous time projection chambers [version 2; peer review: 2 approved] |
| title_full_unstemmed | Micromegas with GEM preamplification for enhanced energy threshold in low-background gaseous time projection chambers [version 2; peer review: 2 approved] |
| title_short | Micromegas with GEM preamplification for enhanced energy threshold in low-background gaseous time projection chambers [version 2; peer review: 2 approved] |
| title_sort | micromegas with gem preamplification for enhanced energy threshold in low background gaseous time projection chambers version 2 peer review 2 approved |
| topic | Dark Matter WIMPs Time Projection Chamber Micromegas Underground Science Low Background Techniques eng |
| url | https://open-research-europe.ec.europa.eu/articles/5-53/v2 |
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