Present Status and Future Perspectives of the NEXT Experiment

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

doi:10.1155/2014/907067

Cited by 66 publications

(59 citation statements)

References 38 publications

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“…The ββ0ν search will be carried out using NEXT-100 which will contain ∼ 100 kg of 136 Xe gas at 15 bar and is described in detail in refs. [4,5]. The first phase of the experiment, called NEW, and deploying 10 kg (and 20% of the sensors), is currently being commissioned at the Laboratorio Subterráneo de Canfranc.…”

Section: Jhep01(2016)104mentioning

confidence: 99%

First proof of topological signature in the high pressure xenon gas TPC with electroluminescence amplification for the NEXT experiment

Ferrario¹,

Laing²,

López-March³

et al. 2016

J. High Energ. Phys.

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Abstract:The NEXT experiment aims to observe the neutrinoless double beta decay of 136 Xe in a high-pressure xenon gas TPC using electroluminescence (EL) to amplify the signal from ionization. One of the main advantages of this technology is the possibility to reconstruct the topology of events with energies close to Q ββ . This paper presents the first demonstration that the topology provides extra handles to reject background events using data obtained with the NEXT-DEMO prototype.Single electrons resulting from the interactions of 22 Na 1275 keV gammas and electronpositron pairs produced by conversions of gammas from the 228 Th decay chain were used to represent the background and the signal in a double beta decay. These data were used to develop algorithms for the reconstruction of tracks and the identification of the energy deposited at the end-points, providing an extra background rejection factor of 24.3 ± 1.4 (stat.)%, while maintaining an efficiency of 66.7 ± 1.% for signal events.

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Section: Jhep01(2016)104mentioning

confidence: 99%

First proof of topological signature in the high pressure xenon gas TPC with electroluminescence amplification for the NEXT experiment

Ferrario¹,

Laing²,

López-March³

et al. 2016

J. High Energ. Phys.

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“…1. TPB is used as a wavelength shifter in noble gas detectors (NEXT [3], ArDM [4]) due to the short scintillation wavelengths of the noble gases (128 nm for Ar, 172 nm for Xe). It is used as a coating for the active surface of the photosensors and the internal walls of the detectors.…”

Section: Introductionmentioning

confidence: 99%

“…Several TPB coatings of different thicknesses (130 nm, 260 nm, 390 nm, 1600 nm) were deposited by vacuum evaporation on quartz substrates, following the protocol described in [6]. Each sample was exposed to controlled VUV light in a dedicated setup, which simulates the exposure conditions in the gaseous Xe electroluminescent TPC, called NEW, used in the NEXT experiment [3]. This TPC is presently being installed in the Canfranc Underground Laboratory (LSC) [7] for measuring the two-neutrino ββ decay mode (ββ2ν) of the 136Xe isotope.…”

Section: Introductionmentioning

confidence: 99%

Ageing studies of TPB in noble gas detectors for dark matter and neutrinoless ββ decay searches

Yahlali

Garcia

Díaz

et al. 2017

Spectrochimica Acta Part A: Molecular and Biomolecular Spectros

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Noble gases (Xe, Ar, Kr) are very attractive as detector media in Dark Matter search and neutrinoless double-beta decay experiments. However, the detection of their scintillation light (in the VUV spectral region) requires shifting the VUV light to visible light, where standard photosensors are more efficient. Tetraphenyl butadiene (TPB) is widely used as wavelength shifter, absorbing the VUV light and re-emitting in the blue region (~430 nm). TPB is an organic molecule that may degrade due to exposure to environmental agents and also to ultraviolet light. In this work, we present TPB ageing studies due to exposure to VUV light, aiming at quantifying the reduction of the absolute fluorescence yield of TPB coatings of several thicknesses (130 nm, 260 nm, 390 nm, 1600 nm), exposed to various doses of VUV light at 170 nm (similar to the Xe scintillation). In our setup, the VUV light is produced from a vacuum monochromator coupled to a deuterium lamp. The VUV exposure in our setup is compared to the exposure obtained in the electroluminescent gaseous Xe TPC of the NEXT-100 experiment for neutrinoless double-beta decay search.

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“…For class A-type neutrino mass models, the effective Majorana mass, hmi ee , is vanishing; thus observation of 0νββ decay rules out these classes of neutrino mass models. The sensitivities of the 0νββ experiments like KamLAND-ZEN [35,36], GERDA [37], CUORE [38,39], NEXT [40,41], and EXO-200 [42,43] have set strong bounds on effective Majorana mass, jhmi ee j, tabulated in Table VI. Recently, the strongest constraint has been obtained by KamLAND-ZEN [36].…”

Section: Type Of Texturementioning

confidence: 99%

Connecting Majorana phases to the geometric parameters of the Majorana unitarity triangle in a neutrino mass matrix model

Verma

Bhardwaj

2018

Phys. Rev. D

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We have investigated a possible connection between the Majorana phases and geometric parameters of Majorana unitarity triangle (MT) in two-texture zero neutrino mass matrix. Such analytical relations can, also, be obtained for other theoretical models viz. hybrid textures, neutrino mass matrix with vanishing minors and have profound implications for geometric description of CP violation. As an example, we have considered the two-texture zero neutrino mass model to obtain a relation between Majorana phases and MT parameters that may be probed in various lepton number violating processes. In particular, we find that Majorana phases depend on only one of the three interior angles of the MT in each class of two-texture zero neutrino mass matrix. We have also constructed the MT for class A, B, and C neutrino mass matrices. Nonvanishing areas and nontrivial orientations of these Majorana unitarity triangles indicate nonzero CP violation as a generic feature of this class of mass models.

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Present Status and Future Perspectives of the NEXT Experiment

Cited by 66 publications

References 38 publications

First proof of topological signature in the high pressure xenon gas TPC with electroluminescence amplification for the NEXT experiment

First proof of topological signature in the high pressure xenon gas TPC with electroluminescence amplification for the NEXT experiment

Ageing studies of TPB in noble gas detectors for dark matter and neutrinoless ββ decay searches

Connecting Majorana phases to the geometric parameters of the Majorana unitarity triangle in a neutrino mass matrix model

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