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

NEXT-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 res...

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Detalhes bibliográficos
Autores: NEXT 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
Formato: artículo
Estado:Versión enviada para evaluación y publicación
Fecha de publicación:2013
País:España
Recursos:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/127114
Acesso em linha:http://hdl.handle.net/10261/127114
Access Level:acceso abierto
Palavra-chave:Double-beta decay detectors
Time projection chambers
Descrição
Resumo:NEXT-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.

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