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Characterization of a medium size Xe/TMA TPC instrumented with microbulk Micromegas, using low-energy gamma-rays

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Characterization of a medium size Xe/TMA TPC instrumented with microbulk Micromegas, using low-energy gamma-rays

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dc.contributor.author	Álvarez Puerta, Vicente
dc.contributor.author	Cárcel García, Sara
dc.contributor.author	Cervera Villanueva, Anselmo
dc.contributor.author	Díaz Medina, José
dc.contributor.author	Ferrario, Paola
dc.contributor.author	Gil Ortiz, Alejandro
dc.contributor.author	Gómez Cadenas, Juan José
dc.contributor.author	Laing, Andrew
dc.contributor.author	Liubarsky, Igor
dc.contributor.author	Lorca Galindo, David
dc.contributor.author	Martín-Albo Simón, Justo
dc.contributor.author	Martínez Pérez, Alberto
dc.contributor.author	Monrabal Capilla, Francesc
dc.contributor.author	Muñoz Vidal, J.
dc.contributor.author	Nebot Guinot, Miquel
dc.contributor.author	Rodríguez Samaniego, Javier
dc.contributor.author	Serra Díaz-Cano, Luis
dc.contributor.author	Simón Estévez, Ander
dc.contributor.author	Sorel, Michel
dc.contributor.author	Yahlali Haddou, Nadia
dc.date.accessioned	2014-09-11T08:37:13Z
dc.date.available	2014-09-11T08:37:13Z
dc.date.issued	2014
dc.identifier.citation	Álvarez Puerta, Vicente Cárcel García, Sara Cervera Villanueva, Anselmo Díaz Medina, José Ferrario, Paola Gil Ortiz, Alejandro Gómez Cadenas, Juan José Laing, Andrew Liubarsky, Igor Lorca Galindo, David Martín-Albo Simón, Justo Martínez Pérez, Alberto Monrabal Capilla, Francesc Muñoz Vidal, J. Nebot Guinot, Miquel Rodríguez Samaniego, Javier Serra Díaz-Cano, Luis Simón Estévez, Ander Sorel, Michel Yahlali Haddou, Nadia 2014 Characterization of a medium size Xe/TMA TPC instrumented with microbulk Micromegas, using low-energy gamma-rays Journal Of Instrumentation 9 C04015-1 C04015-23
dc.identifier.uri	http://hdl.handle.net/10550/37740
dc.description.abstract	NEXT-MM is a general-purpose high pressure (10 bar, ~ 25 l active volume) Xenon-based TPC, read out in charge mode with an 0.8 cm × 0.8 cm-segmented 700 cm2 plane (1152 ch) of the latest microbulk-Micromegas technology. It has been recently commissioned at University of Zaragoza as part of the R&D of the NEXT 0νββ experiment, although the experiment's first stage is currently being built based on a SiPM/PMT-readout concept relying on electroluminescence. Around 2 million events were collected during the last months, stemming from the low energy γ-rays emitted by a 241Am source when interacting with the Xenon gas (Eγ = 26, 30, 59.5 keV). The localized nature of such events around atmospheric pressure, the long drift times, as well as the possibility to determine their production time from the associated α particle in coincidence, allow the extraction of primordial properties of the TPC filling gas, namely the drift velocity, diffusion and attachment coefficients. In this work we focus on the little explored combination of Xe and trimethylamine (TMA) for which, in particular, such properties are largely unknown. This gas mixture offers potential advantages over pure Xenon when aimed at Rare Event Searches, mainly due to its Penning characteristics, wave-length shifting properties and reduced diffusion, and it is being actively investigated by our collaboration. The chamber is currently operated at 2.7 bar, as an intermediate step towards the envisaged 10 bar. We report here its performance as well as a first implementation of the calibration procedures that have allowed the extension of the previously reported energy resolution to the whole readout plane (10.6% FWHM@30 keV).
dc.language.iso	eng
dc.relation.ispartof	Journal Of Instrumentation, 2014, vol. 9, p. C04015-1-C04015-23
dc.subject	Física nuclear
dc.title	Characterization of a medium size Xe/TMA TPC instrumented with microbulk Micromegas, using low-energy gamma-rays
dc.type	journal article	es_ES
dc.date.updated	2014-09-11T08:37:13Z
dc.identifier.doi	10.1088/1748-0221/9/04/C04015
dc.identifier.idgrec	097688
dc.rights.accessRights	open access	es_ES