Operation and first results of the NEXT-DEMO prototype using a 
silicon photomultiplier tracking array

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; G Martínez; T Miller; A Moiseenko; F Monrabal; M Monserrate; 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; J F C A Veloso; J A Villar; R Webb; J T White; N Yahlali

doi:10.1088/1748-0221/8/09/P09011

Journal of Instrumentation

Operation and first results of the NEXT-DEMO prototype using a silicon photomultiplier tracking array

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, G Martínez¹⁰, T Miller⁴, A Moiseenko⁶, F Monrabal¹, M Monserrate¹, 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, J F C A Veloso⁷, J A Villar³, R Webb¹⁴, J T White¹⁴ and N Yahlali¹

Published 20 September 2013 • © 2013 IOP Publishing Ltd and Sissa Medialab srl
Journal of Instrumentation, Volume 8, September 2013 Citation V Álvarez et al 2013 JINST 8 P09011 DOI 10.1088/1748-0221/8/09/P09011

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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), Universidad 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 Departamento de Mecánica de Medios Continuos y Teoría de Estructuras, Universitat 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 7 June 2013
Accepted 19 August 2013
Published 20 September 2013

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Abstract

NEXT-DEMO is a high-pressure xenon gas TPC which acts as a technological test-bed and demonstrator for the NEXT-100 neutrinoless double beta decay experiment. In its current configuration the apparatus fully implements the NEXT-100 design concept. This is an asymmetric TPC, with an energy plane made of photomultipliers and a tracking plane made of silicon photomultipliers (SiPM) coated with TPB. The detector in this new configuration has been used to reconstruct the characteristic signature of electrons in dense gas, demonstrating the ability to identify the MIP and ``blob'' regions. Moreover, the SiPM tracking plane allows for the definition of a large fiducial region in which an excellent energy resolution of 1.82% FWHM at 511 keV has been measured (a value which extrapolates to 0.83% at the xenon Q_ββ).

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