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Initial results of NEXT-DEMO, a large-scale prototype of the NEXT-100 experiment

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Initial results of NEXT-DEMO, a large-scale prototype of the NEXT-100 experiment

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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; Simón Estévez, Ander; Sorel, Michel; Yahlali Haddou, Nadia

Aquest document és un/a article, creat/da en: 2013

Este documento está disponible también en : 10.1088/1748-0221/8/04/P04002

NEXT-DEMO is a large scale prototype and demonstrator of the NEXT-100 High Pressure Xenon Gas TPC, which will search for the neutrinoless double beta decay of Xe-136 using 100-150 kg of enriched xenon gas. The apparatus was built to prove the expected performance of NEXT-100, namely, energy resolution better than 1% FWHM at 2.5 MeV and event topological reconstruction. In this paper we describe the operation and initial results of the detector. A resolution of 1.7% FWHM at 511 keV (0.77% FWHM at 2.5 MeV) is obtained in the full fiducial volume of the detector. A topological analysis shows that electrons are identified by the characteristic blob energy deposit associated to the Bragg peak in 98.5% of the cases, with a rate of misidentification (two blobs) of 0.14%.

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