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Description and commissioning of NEXT-MM prototype: first results from operation in a Xenon-Trimethylamine gas mixture

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Description and commissioning of NEXT-MM prototype: first results from operation in a Xenon-Trimethylamine gas mixture

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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

Aquest document és un/a article, creat/da en: 2014

A technical description of NEXT-MM and its commissioning and first performance is reported. Having an active volume of similar to 35 cm drift x 28 cm diameter, it constitutes the largest Micromegas-read TPC operated in Xenon ever constructed, made by a sectorial arrangement of the 4 largest single wafers manufactured with the Microbulk technique to date. It is equipped with a suitably pixelized readout and with a sufficiently large sensitive volume (similar to 23 l) so as to contain long (similar to 20 cm) electron tracks. First results obtained at 1 bar for Xenon and Trymethylamine (Xe-(2%) TMA) mixture are presented. The TPC can accurately reconstruct extended background tracks. An encouraging full-width half-maximum of 11.6% was obtained for similar to 29 keV gammas without resorting to any data post-processing.

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