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

V Álvarez; F I G Borges; S Cárcel; J Castel; S Cebrián; A Cervera; C A N Conde; T Dafni; T H V T Dias; J Díaz; M Egorov; R Esteve; P Evtoukhovitch; L M P Fernandes; P Ferrario; A L Ferreira; E D C Freitas; V M Gehman; A Gil; A Goldschmidt; H Gómez; J J Gómez-Cadenas; D González-Díaz; R M Gutiérrez; J Hauptman; J A Hernando Morata; D C Herrera; F J Iguaz; I G Irastorza; M A Jinete; L Labarga; A Laing; I Liubarsky; J A M Lopes; D Lorca; M Losada; G Luzón; A Marí; J Martín-Albo; A Martínez; T Miller; A Moiseenko; F Monrabal; C M B Monteiro; F J Mora; L M Moutinho; J Muñoz Vidal; H Natal da Luz; G Navarro; M Nebot-Guinot; D Nygren; C A B Oliveira; R Palma; J Pérez; J L Pérez Aparicio; J Renner; L Ripoll; A Rodríguez; J Rodríguez; F P Santos; J M F dos Santos; L Seguí; L Serra; D Shuman; A Simón; C Sofka; M Sorel; J F Toledo; A Tomás; J Torrent; Z Tsamalaidze; D Vázquez; J F C A Veloso; J A Villar; R Webb; J T White; N Yahlali

doi:10.1088/1748-0221/8/04/P04002

Journal of Instrumentation

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

V Álvarez¹, F I G Borges², S Cárcel¹, J Castel³, S Cebrián³, A Cervera¹, C A N Conde², T Dafni³, T H V T Dias², J Díaz¹, M Egorov⁴, R Esteve⁵, P Evtoukhovitch⁶, L M P Fernandes², P Ferrario¹, A L Ferreira⁷, E D C Freitas², V M Gehman⁴, A Gil¹, A Goldschmidt⁴, H Gómez³, J J Gómez-Cadenas¹, D González-Díaz³, R M Gutiérrez⁸, J Hauptman⁹, J A Hernando Morata¹⁰, D C Herrera³, F J Iguaz³, I G Irastorza³, M A Jinete⁸, L Labarga¹¹, A Laing¹, I Liubarsky¹, J A M Lopes², D Lorca¹, M Losada⁸, G Luzón³, A Marí⁵, J Martín-Albo¹, A Martínez¹, T Miller⁴, A Moiseenko⁶, F Monrabal¹, C M B Monteiro², F J Mora⁵, L M Moutinho⁷, J Muñoz Vidal¹, H Natal da Luz², G Navarro⁸, M Nebot-Guinot¹, D Nygren⁴, C A B Oliveira⁴, R Palma¹², J Pérez¹¹, J L Pérez Aparicio¹², J Renner⁴, L Ripoll¹³, A Rodríguez³, J Rodríguez¹, F P Santos², J M F dos Santos², L Seguí³, L Serra¹, D Shuman⁴, A Simón¹, C Sofka¹⁴, M Sorel¹, J F Toledo⁴, A Tomás³, J Torrent¹³, Z Tsamalaidze⁶, D Vázquez¹⁰, J F C A Veloso⁷, J A Villar³, R Webb¹⁴, J T White¹⁴ and N Yahlali¹

Published 3 April 2013 • © 2013 IOP Publishing Ltd and Sissa Medialab srl
Journal of Instrumentation, Volume 8, April 2013 Citation V Álvarez et al 2013 JINST 8 P04002 DOI 10.1088/1748-0221/8/04/P04002

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¹ Instituto de Física Corpuscular (IFIC), CSIC & Universitat de València, Calle Catedrático José Beltrán, 2, 46980 Paterna, Valencia, Spain

² Departamento de Fisica, Universidade de Coimbra, Rua Larga, 3004-516 Coimbra, Portugal

³ Lab. de Física Nuclear y Astropartículas, Universidad de Zaragoza, Calle Pedro Cerbuna, 12, 50009 Zaragoza, Spain

⁴ Lawrence Berkeley National Laboratory (LBNL), 1 Cyclotron Road, Berkeley, California 94720, USA

⁵ Instituto de Instrumentación para Imagen Molecular (I3M), Universitat Politècnica de València, Camino de Vera, s/n, Edificio 8B, 46022 Valencia, Spain

⁶ Joint Institute for Nuclear Research (JINR), Joliot-Curie 6, 141980 Dubna, Russia

⁷ Institute of Nanostructures, Nanomodelling and Nanofabrication (i3N), Universidade de Aveiro, Campus de Santiago, 3810-193 Aveiro, Portugal

⁸ Centro de Investigaciones, Universidad Antonio Nariño, Carretera 3 este No. 47A-15, Bogotá, Colombia

⁹ Department of Physics and Astronomy, Iowa State University, 12 Physics Hall, Ames, Iowa 50011-3160, USA

¹⁰ Instituto Gallego de Física de Altas Energías (IGFAE), Univ. de Santiago de Compostela, Campus sur, Rúa Xosé María Suárez Núñez, s/n, 15782 Santiago de Compostela, Spain

¹¹ Departamento de Física Teórica, Universidad Autónoma de Madrid, Ciudad Universitaria de Cantoblanco, 28049 Madrid, Spain

¹² Dpto. de Mecánica de Medios Continuos y Teoría de Estructuras, Univ. Politècnica de València, Camino de Vera, s/n, 46071 Valencia, Spain

¹³ Escola Politècnica Superior, Universitat de Girona, Av. Montilivi, s/n, 17071 Girona, Spain

¹⁴ Department of Physics and Astronomy, Texas A&M University, College Station, Texas 77843-4242, USA

Dates

Received 14 February 2013
Accepted 8 March 2013
Published 3 April 2013

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Abstract

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 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 2.5 MeV 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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