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The NEXT-100 experiment for neutrinoless double beta decay searches (Conceptual Design Report) | | NEXT Collaboration
; V. Álvarez
; M. Ball
; M. Batallé
; J. Bayarri
; F.I.G. Borges
; S. Cárcel
; J.M. Carmona
; J. Castel
; J.M. Catalá
; S. Cebrián
; A. Cervera-Villanueva
; D. Chan
; C.A.N. Conde
; T. Dafni
; T.H.V.T. Dias
; J. Díaz
; R. Esteve
; P. Evtoukhovitch
; L.M.P. Fernandes
; P. Ferrario
; E. Ferrer-Ribas
; A.L. Ferreira
; E.D.C. Freitas
; A. Gil
; I. Giomataris
; A. Goldschmidt
; E. Gómez
; H. Gómez
; J.J. Gómez-Cadenas
; K. Gónzález
; R.M. Gutiérrez
; J.A. Hernando-Morata
; D.C. Herrera
; V. Herrero
; F. Iguaz
; I.G. Irastorza
; V. Kalinnikov
; A. Kustov
; I. Liubarsky
; J.A.M. Lopes
; D. Lorca
; M. Losada
; G. Luzón
; J. Martín-Albo
; A. Méndez
; T. Miller
; A. Moisenko
; J.P. Mols
; F. Monrabal
; C.M.B. Monteiro
; J.M. Monzó
; F.J. Mora
; J. Muñoz-Vidal
; H. Natal da Luz
; G. Navarro
; M. Nebot
; D. Nygren
; C.A.B. Oliveira
; R. Palma
; J.L. Pérez-Aparicio
; J. Renner
; L. Ripoll
; A. Rodríguez
; J. Rodríguez
; F.P. Santos
; J.M.F. dos Santos
; L. Seguí
; L. Serra
; C. Sofka
; M. Sorel
; H. Spieler
; J.F. Toledo
; A. Tomás
; Z. Tsamalaidze
; D. Vázquez
; E. Velicheva
; J.F.C.A. Veloso
; J.A. Villar
; R. Webb
; T. Weber
; J. White
; N. Yahlali
; | | Date: |
18 Jun 2011 | | Abstract: | We propose an EASY (Electroluminescent ApparatuS of high Yield) and SOFT
(Separated Optimized FuncTion) time-projection chamber for the NEXT experiment,
that will search for neutrinoless double beta decay (bb0nu) in Xe-136. Our
experiment must be competitive with the new generation of bb0nu searches
already in operation or in construction. This requires a detector with very
good energy resolution (<1%), very low background con- tamination (1E-4
counts/(keV ullet kg ullet y)) and large target mass. In addition, it needs
to be operational as soon as possible. The design described here optimizes
energy resolution thanks to the use of proportional electroluminescent
amplification (EL); it is compact, as the Xe gas is under high pressure; and it
allows the measurement of the topological signature of the event to further
reduce the background contamination. The SOFT design uses different sensors for
tracking and calorimetry. We propose the use of SiPMs (MPPCs) coated with a
suitable wavelength shifter for the tracking, and the use of radiopure
photomultipliers for the measurement of the energy and the primary
scintillation needed to estimate the t0. This design provides the best possible
energy resolution compared with other NEXT designs based on avalanche gain
devices. The baseline design is an Asymmetric Neutrino Gas EL apparatus
(ANGEL), which was already outlined in the NEXT LOI. ANGEL is conceived to be
easy to fabricate. It requires very little R&D and most of the proposed
solutions have already been tested in the NEXT-1 prototypes. Therefore, the
detector can be ready by 2013. In this Conceptual Design Report (CDR) we
discuss first the physics case, present a full design of the detector, describe
the NEXT-1 EL prototypes and their initial results, and outline a project to
build a detector with 100 kg of enriched xenon to be installed in the Canfranc
Underground Laboratory in 2013. | | Source: | arXiv, 1106.3630 | | Services: | Forum | Review | PDF | Favorites | |
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