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

Ferrario, P.; Laing, A.; López-March, N.; Gómez-Cadenas, J.J.; Álvarez, V.; Azevedo, C.D.R.; Borges, F.I.G.M.; Cárcel, S.; Cebrián, S.; Conde, C.A.N.; Dafní, T.; Díaz, Julio Pérez; Diesburg, M.; Esteve, R.; Fernandes, L. M. P.; Ferreira, A. L.; Freitas, E.D.C.; Gehman, V. M.; Goldschmidt, A.; González-Díaz, D.; Gutiérrez, Rafael; Hauptman, J. M.; Henriques, C. A. O.; Morata, J. A. Hernando; Irastorza, I. G.; Labarga, L.; Lebrun, P.; Liubarsky, I.; Lorca, D.; Losada, M.; Luzón, G.; Marí, A.; Martín-Albo, J.; Martínez-Lema, G.; Martínez, A.; Miller, T.; Monrabal, F.; Monserrate, M.; Monteiro, C. M. B.; Mora, Francisco; Moutinho, L.M.; Vidal, J. Muñoz; Nebot-Guinot, M.; Novella, P.; Nygren, D. R.; Para, A.; Pérez, Javier Laso; Pérez-Aparicio, José L.; Querol, M.; Renner, J.; Ripoll, L.; Rodriguez, J.; Santos, F.P.; Santos, J. M. F. dos; Serra, Llorenç; Shuman, D.; Simón, A.; Sofka, C.; Sorel, M.; Toledo, J.F.; Torrent, J.; Tsamalaidze, Z.; Veloso, J.F.C.A.; Villar, J.A.; Webb, R.; White, J. T.; Yahlali, N.; Yepes-Ramírez, H.

doi:10.48550/arxiv.1507.05902

Cited by 5 publications

(10 citation statements)

References 13 publications

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“…A series of detectors have proven the performance of the HPXeTPC technology in the key parameters required for the observation of 0νββ decay. The NEXT concept was initially tested in small scale, surface-operated detectors [19][20][21][22][23]. This phase was followed by the underground operation at the LSC of NEXT-White [24], a radiopure detector of ∼ 3.5 kg of active xenon mass at 10 bar.…”

Section: Present Statusmentioning

confidence: 99%

Sensitivity of a tonne-scale NEXT detector for neutrinoless double beta decay searches

Adams¹,

Álvarez²,

Arazi³

et al. 2020

Preprint

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The Neutrino Experiment with a Xenon TPC (NEXT) searches for the neutrinoless double beta (0νββ) decay of 136 Xe using high-pressure xenon gas TPCs with electroluminescent amplification. A scaled-up version of this technology with ∼ 1 tonne of enriched xenon could reach, in a few years of operation, a sensitivity to the half-life of 0νββ decay better than 10 27 years, improving the current limits by at least one order of magnitude. This prediction is based on a well-understood background model dominated by radiogenic sources. The detector concept presented here represents a first step on a compelling path towards sensitivity to the parameter space defined by the inverted hierarchy, and beyond.

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Section: Present Statusmentioning

confidence: 99%

Sensitivity of a tonne-scale NEXT detector for neutrinoless double beta decay searches

Adams¹,

Álvarez²,

Arazi³

et al. 2020

Preprint

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“…The helium percentage-by-mass ranged between 0 to 5% and the number of 137 Xe created were counted for each run. A control simulation set was generated using a mixture of the same enriched xenon with 4 He. This helium isotope does not capture neutrons and, as such, its admixture is expected to have no effect on the number of 137 Xe produced.…”

Section: Xe Production From Internal Neutronsmentioning

confidence: 99%

“…where N 137 is the number of 137 Xe produced in the simulations, E 136 is the level of enrichment in the 136 isotope, P Xe is the proportion of the gas mixture taken up by xenon, and m a is the mass in the active volume of the detector. Figure 3-left shows the results for mixtures with 4 He and 3 He. No statistically relevant change in the normalized number of activations for any proportion of 4 He is found.…”

Section: Xe Production From Internal Neutronsmentioning

confidence: 99%

“…The NEXT program has developed the technology of high-pressure xenon gas Time Projection Chambers (TPCs) with electroluminescent amplification (HPXeTPC) for neutrinoless double beta decay searches [1,2]. The possibility to achieve sub-1% FWHM energy resolution and to topologically identify signal-like events was proven in small scale prototypes [3,4] and has since been tested underground at demonstrator-scale with the NEXT-White (NEW) detector [5][6][7][8]. The subsequent stage of the project will deploy 100 kg of 136 Xe as NEXT-100, currently under construction at Laboratorio Subterráneo de Canfranc (LSC), Spain, with the goal of setting a competitive limit on the 136 Xe 0νββ half life with the world's lowest background index in xenon.…”

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Mitigation of Backgrounds from Cosmogenic $^{137}$Xe in Xenon Gas Experiments using $^{3}$He Neutron Capture

Rogers,

Jones,

Laing

et al. 2020

Preprint

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136 Xe is used as the target medium for many experiments searching for 0νββ. Despite underground operation, cosmic muons that reach the laboratory can produce spallation neutrons causing activation of detector materials. A potential background that is difficult to veto using muon tagging comes in the form of 137 Xe created by the capture of neutrons on 136 Xe. This isotope decays via beta decay with a half-life of 3.8 minutes and a Q β of ∼4.16 MeV. This work proposes and explores the concept of adding a small percentage of 3 He to xenon as a means to capture thermal neutrons and reduce the number of activations in the detector volume. When using this technique we find the contamination from 137 Xe activation can be reduced to negligible levels in tonne and multi-tonne scale high pressure gas xenon neutrinoless double beta decay experiments running at any depth in an underground laboratory.

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“…At a different level, algorithms that can follow the real path of the electron in the gas will help identifying the end-points of the electron path improving our blob identification, but the behaviour of such algorithms is also closely related with the position resolution. A more detailed explanation of the topological signature and a description and experimental results of the first efforts of the NEXT Collaboration in that direction can be found in [2].…”

Section: Introduction and Topological Signaturementioning

confidence: 99%

An homeopathic cure to pure Xenon large diffusion

et al. 2016

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The NEXT neutrinoless double beta decay (β β 0ν) experiment will use a highpressure gas electroluminescence-based TPC to search for the decay of Xe-136. One of the main advantages of this technology is the possibility to reconstruct the topology of events with energies close to Q β β . The rejection potential associated to the topology reconstruction is limited by our capacity to properly reconstruct the original path of the electrons in the gas. This reconstruction is limited by different factors that include the geometry of the detector, the density of the sensors in the tracking plane and the separation among them, etc. Ultimately, the resolution is limited by the physics of electron diffusion in the gas. In this paper we present a series of molecular additives that can be used in Xenon gas at very low partial pressure to reduce both longitudinal and transverse diffusion. We will show the results of different Monte-Carlo simulations of electron transport in the gas mixtures from wich we have extracted the value of some important parameters like diffusion, drift velocity and light yields. These results show that there is a series of candidates that can reduce diffusion without affecting the energy resolution of the detector and they should be studied experimentally. A comparison with preliminary results from such an ongoing experimental effort is given.

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

Cited by 5 publications

References 13 publications

Sensitivity of a tonne-scale NEXT detector for neutrinoless double beta decay searches

Sensitivity of a tonne-scale NEXT detector for neutrinoless double beta decay searches

Mitigation of Backgrounds from Cosmogenic $^{137}$Xe in Xenon Gas Experiments using $^{3}$He Neutron Capture

An homeopathic cure to pure Xenon large diffusion

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