Electroluminescence TPCs at the thermal diffusion limit
The NEXT experiment aims at searching for the hypothetical neutrinoless double-beta decay from the Xe isotope using a high-purity xenon TPC. Efficient discrimination of the events through pattern recognition of the topology of primary ionisation tracks is a major requirement for the experiment. Howe...
| Autores: | , , , , , , , , , , , , , , , , , , , , , , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2019 |
| País: | España |
| Institución: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repositorio: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:digital.csic.es:10261/194662 |
| Acceso en línea: | http://hdl.handle.net/10261/194662 |
| Access Level: | acceso abierto |
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Electroluminescence TPCs at the thermal diffusion limitÁlvarez Puerta, VicenteBenlloch Rodríguez, José MaríaBotas, A.Cárcel, SaraCarrión, J. V. Díaz Medina, JoséFelkai, RyanKekic, MarijaLaing, AndrewLópez-March, NeusMartínez Pérez, AlbertoMartinez-Lema, G.Musti, M.Muñoz Vidal, JavierNebot Guinot, MiquelNovella, PauPalmeiro, BraisQuerol, MarcRenner, JoshuaRodríguez Samaniego, JavierRomo Luque, CarmenSimón, AnderSorel, MichelSimón, AnderYahlali, NadiaNEXT CollaborationThe NEXT experiment aims at searching for the hypothetical neutrinoless double-beta decay from the Xe isotope using a high-purity xenon TPC. Efficient discrimination of the events through pattern recognition of the topology of primary ionisation tracks is a major requirement for the experiment. However, it is limited by the diffusion of electrons. It is known that the addition of a small fraction of a molecular gas to xenon reduces electron diffusion. On the other hand, the electroluminescence (EL) yield drops and the achievable energy resolution may be compromised. We have studied the effect of adding several molecular gases to xenon (CO, CH and CF) on the EL yield and energy resolution obtained in a small prototype of driftless gas proportional scintillation counter. We have compared our results on the scintillation characteristics (EL yield and energy resolution) with a microscopic simulation, obtaining the diffusion coefficients in those conditions as well. Accordingly, electron diffusion may be reduced from about 10 mm/m for pure xenon down to 2.5 mm/m using additive concentrations of about 0.05%, 0.2% and 0.02% for CO, CH and CF, respectively. Our results show that CF admixtures present the highest EL yield in those conditions, but very poor energy resolution as a result of huge fluctuations observed in the EL formation. CH presents the best energy resolution despite the EL yield being the lowest. The results obtained with xenon admixtures are extrapolated to the operational conditions of the NEXT-100 TPC. CO and CH show potential as molecular additives in a large xenon TPC. While CO has some operational constraints, making it difficult to be used in a large TPC, CH shows the best performance and stability as molecular additive to be used in the NEXT-100 TPC, with an extrapolated energy resolution of 0.4% at 2.45 MeV for concentrations below 0.4%, which is only slightly worse than the one obtained for pure xenon. We demonstrate the possibility to have an electroluminescence TPC operating very close to the thermal diffusion limit without jeopardizing the TPC performance, if CO or CH are chosen as additives.[Figure not available: see fulltext.]Peer ReviewedInstitute of Physics PublishingEuropean CommissionMinisterio de Economía y Competitividad (España)Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]2019201920192019info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionhttp://hdl.handle.net/10261/194662reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE##PLACEHOLDER_PARENT_METADATA_VALUE##PLACEHOLDER_PARENT_METADATA_VALUE##PLACEHOLDER_PARENT_METADATA_VALUE#info:eu-repo/grantAgreement/EC/H2020/674896info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/FIS2014-53371-C4-1-Rinfo:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/SEV-2014-0398info:eu-repo/grantAgreement/EC/H2020/690575Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/1946622026-05-22T06:33:51Z |
| dc.title.none.fl_str_mv |
Electroluminescence TPCs at the thermal diffusion limit |
| title |
Electroluminescence TPCs at the thermal diffusion limit |
| spellingShingle |
Electroluminescence TPCs at the thermal diffusion limit Álvarez Puerta, Vicente |
| title_short |
Electroluminescence TPCs at the thermal diffusion limit |
| title_full |
Electroluminescence TPCs at the thermal diffusion limit |
| title_fullStr |
Electroluminescence TPCs at the thermal diffusion limit |
| title_full_unstemmed |
Electroluminescence TPCs at the thermal diffusion limit |
| title_sort |
Electroluminescence TPCs at the thermal diffusion limit |
| dc.creator.none.fl_str_mv |
Álvarez Puerta, Vicente Benlloch Rodríguez, José María Botas, A. Cárcel, Sara Carrión, J. V. Díaz Medina, José Felkai, Ryan Kekic, Marija Laing, Andrew López-March, Neus Martínez Pérez, Alberto Martinez-Lema, G. Musti, M. Muñoz Vidal, Javier Nebot Guinot, Miquel Novella, Pau Palmeiro, Brais Querol, Marc Renner, Joshua Rodríguez Samaniego, Javier Romo Luque, Carmen Simón, Ander Sorel, Michel Simón, Ander Yahlali, Nadia NEXT Collaboration |
| author |
Álvarez Puerta, Vicente |
| author_facet |
Álvarez Puerta, Vicente Benlloch Rodríguez, José María Botas, A. Cárcel, Sara Carrión, J. V. Díaz Medina, José Felkai, Ryan Kekic, Marija Laing, Andrew López-March, Neus Martínez Pérez, Alberto Martinez-Lema, G. Musti, M. Muñoz Vidal, Javier Nebot Guinot, Miquel Novella, Pau Palmeiro, Brais Querol, Marc Renner, Joshua Rodríguez Samaniego, Javier Romo Luque, Carmen Simón, Ander Sorel, Michel Yahlali, Nadia NEXT Collaboration |
| author_role |
author |
| author2 |
Benlloch Rodríguez, José María Botas, A. Cárcel, Sara Carrión, J. V. Díaz Medina, José Felkai, Ryan Kekic, Marija Laing, Andrew López-March, Neus Martínez Pérez, Alberto Martinez-Lema, G. Musti, M. Muñoz Vidal, Javier Nebot Guinot, Miquel Novella, Pau Palmeiro, Brais Querol, Marc Renner, Joshua Rodríguez Samaniego, Javier Romo Luque, Carmen Simón, Ander Sorel, Michel Yahlali, Nadia NEXT Collaboration |
| author2_role |
author author author author author author author author author author author author author author author author author author author author author author author author |
| dc.contributor.none.fl_str_mv |
European Commission Ministerio de Economía y Competitividad (España) Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72] |
| description |
The NEXT experiment aims at searching for the hypothetical neutrinoless double-beta decay from the Xe isotope using a high-purity xenon TPC. Efficient discrimination of the events through pattern recognition of the topology of primary ionisation tracks is a major requirement for the experiment. However, it is limited by the diffusion of electrons. It is known that the addition of a small fraction of a molecular gas to xenon reduces electron diffusion. On the other hand, the electroluminescence (EL) yield drops and the achievable energy resolution may be compromised. We have studied the effect of adding several molecular gases to xenon (CO, CH and CF) on the EL yield and energy resolution obtained in a small prototype of driftless gas proportional scintillation counter. We have compared our results on the scintillation characteristics (EL yield and energy resolution) with a microscopic simulation, obtaining the diffusion coefficients in those conditions as well. Accordingly, electron diffusion may be reduced from about 10 mm/m for pure xenon down to 2.5 mm/m using additive concentrations of about 0.05%, 0.2% and 0.02% for CO, CH and CF, respectively. Our results show that CF admixtures present the highest EL yield in those conditions, but very poor energy resolution as a result of huge fluctuations observed in the EL formation. CH presents the best energy resolution despite the EL yield being the lowest. The results obtained with xenon admixtures are extrapolated to the operational conditions of the NEXT-100 TPC. CO and CH show potential as molecular additives in a large xenon TPC. While CO has some operational constraints, making it difficult to be used in a large TPC, CH shows the best performance and stability as molecular additive to be used in the NEXT-100 TPC, with an extrapolated energy resolution of 0.4% at 2.45 MeV for concentrations below 0.4%, which is only slightly worse than the one obtained for pure xenon. We demonstrate the possibility to have an electroluminescence TPC operating very close to the thermal diffusion limit without jeopardizing the TPC performance, if CO or CH are chosen as additives.[Figure not available: see fulltext.] |
| publishDate |
2019 |
| dc.date.none.fl_str_mv |
2019 2019 2019 2019 |
| dc.type.none.fl_str_mv |
info:eu-repo/semantics/article http://purl.org/coar/resource_type/c_6501 Publisher's version info:eu-repo/semantics/publishedVersion |
| format |
article |
| status_str |
publishedVersion |
| dc.identifier.none.fl_str_mv |
http://hdl.handle.net/10261/194662 |
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http://hdl.handle.net/10261/194662 |
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Inglés |
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Inglés |
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#PLACEHOLDER_PARENT_METADATA_VALUE# #PLACEHOLDER_PARENT_METADATA_VALUE# #PLACEHOLDER_PARENT_METADATA_VALUE# #PLACEHOLDER_PARENT_METADATA_VALUE# info:eu-repo/grantAgreement/EC/H2020/674896 info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/FIS2014-53371-C4-1-R info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/SEV-2014-0398 info:eu-repo/grantAgreement/EC/H2020/690575 Sí |
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info:eu-repo/semantics/openAccess |
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openAccess |
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Institute of Physics Publishing |
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Institute of Physics Publishing |
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reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC instname:Consejo Superior de Investigaciones Científicas (CSIC) |
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