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Title

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

AuthorsNEXT Collaboration; Álvarez Puerta, Vicente ; Cárcel, 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, Justo ; Martínez Pérez, Alberto ; Monrabal, Francesc ; Muñoz Vidal, Javier; Nebot Guinot, Miquel ; Rodríguez Samaniego, Javier ; Serra, Luis ; Sorel, Michel ; Simón, Ander ; Yahlali, Nadia
KeywordsDouble-beta decay detectors
Time projection chambers
Issue DateApr-2013
PublisherInstitute of Physics Publishing
CitationJournal of Instrumentation 08: P04002 - 25 (2013)
AbstractNEXT-DEMO is a large-scale prototype of the NEXT-100 detector, an electroluminescent time projection chamber that will search for the neutrinoless double beta decay of Xe-136 using 100-150 kg of enriched xenon gas. NEXT-DEMO was built to prove the expected performance of NEXT-100, namely, energy resolution better than 1% FWHM at 2.5MeV and event topological reconstruction. In this paper we describe the prototype and its initial results. A resolution of 1.75% FWHM at 511 keV (which extrapolates to 0.8% FWHM at 2.5 MeV) was obtained at 10 bar pressure using a gamma-ray calibration source. Also, a basic study of the event topology along the longitudinal coordinate is presented, proving that it is possible to identify the distinct dE/dx of electron tracks in high-pressure xenon using an electroluminescence TPC.
Publisher version (URL)http://dx.doi.org/10.1088/1748-0221/8/04/P04002
URIhttp://hdl.handle.net/10261/127114
DOI10.1088/1748-0221/8/04/P04002
ISSN1748-0221
E-ISSN1748-0221
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