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Browsing by Author "Azevedo, C.D.R."

Now showing items 1-19 of 19

Background rejection in NEXT using deep neural networks

Renner, J.; Farbin, A.; Muñoz Vidal, J.; Benlloch-Rodríguez, J.M.; Botas, A.; Ferrario, P.; Gómez-Cadenas, J.J.; Álvarez, V.; Azevedo, C.D.R.; Borges, F.I.G.; Cárcel, S.; Carrión, J.V.; Esteve Bosch, Raul; Herrero Bosch, Vicente; Mora Mas, Francisco José; Toledo Alarcón, José Francisco (IOP Publishing, 2017-01)

[EN] We investigate the potential of using deep learning techniques to reject background events in searches for neutrinoless double beta decay with high pressure xenon time projection chambers capable of detailed track ...
Demonstration of background rejection using deep convolutional neural networks in the NEXT experiment

Kekic, M.; Adams, C.; Woodruff, K.; Renner, J.; Church, E.; Del Tutto, M.; Hernando Morata, J. A.; Gomez-Cadenas, J. J.; Álvarez-Puerta, Vicente; Arazi, L.; Arnquist, I.J.; Azevedo, C. D. R.; Bailey, K.; Ballester Merelo, Francisco José; Benlloch-Rodriguez, J. M.; Esteve Bosch, Raul; Herrero Bosch, Vicente; Mora Mas, Francisco José; Rodriguez-Samaniego, Javier; Toledo Alarcón, José Francisco (Springer-Verlag, 2021-01-28)

[EN] Convolutional neural networks (CNNs) are widely used state-of-the-art computer vision tools that are becoming increasingly popular in high-energy physics. In this paper, we attempt to understand the potential of CNNs ...
Demonstration of event position reconstruction based on diffusion in the NEXT-white detector

Haefner, J.; Navarro, K.E.; Guenette, R.; Jones, B.J.P.; Tripathi, Animesh; Adams, C.; Almazán, H.; Álvarez-Puerta, Vicente; Aparicio, B.; Aranburu, A. I.; Arazi, L.; Arnquist, I.J.; Auria-Luna, F; Ayet, S.; Azevedo, C.D.R.; Ballester, F.; Esteve, R.; Mora, F.J.; Rodríguez, J.; Herrero, V. (Springer-Verlag, 2024-05-21)

[EN] Noble element time projection chambers are a leading technology for rare event detection in physics, such as for dark matter and neutrinoless double beta decay searches. Time projection chambers typically assign event ...
Demonstration of Single-Barium-Ion Sensitivity for Neutrinoless Double-Beta Decay Using Single-Molecule Fluorescence Imaging

McDonald, A.D.; Jones, B.J.P.; Nygren, D.R.; Adams, C.; Álvarez-Puerta, Vicente; Azevedo, C.D.R.; Benlloch-Rodríguez, J.M.; Borges, F.I.G.M.; Botas, A.; Cárcel García, Sara; Carrión Burguete, José Vicente; Cebrian, S.; Conde, C.A.N.; Diaz, J.; Esteve Bosch, Raul; Herrero Bosch, Vicente; Mora Mas, Francisco José; Toledo Alarcón, José Francisco (American Physical Society, 2018-03-26)

[EN] A new method to tag the barium daughter in the double-beta decay of Xe-136 is reported. Using the technique of single molecule fluorescent imaging (SMFI), individual barium dication (Ba++) resolution at a transparent ...
Demonstration of the event identification capabilities of the NEXT-White detector

Ferrario, Paola; Benlloch-Rodríguez, J.M.; Díaz López, G.; Hernando Morata, J.A.; Kekic, M.; Renner, J.; Usón, A.; Gómez-Cadenas, J.J.; Adams, C.; Álvarez-Puerta, Vicente; Arazi, L.; Arnquist, I.J.; Azevedo, C.D.R.; Bailey, K.; Ballester Merelo, Francisco José; Esteve Bosch, Raul; Herrero Bosch, Vicente; Mora Mas, Francisco José; Rodriguez-Samaniego, Javier; Toledo Alarcón, José Francisco (Springer-Verlag, 2019-10-04)

[EN] In experiments searching for neutrinoless double-beta decay, the possibility of identifying the two emitted electrons is a powerful tool in rejecting background events and therefore improving the overall sensitivity ...
Dependence of polytetrafluoroethylene reflectance on thickness at visible and ultraviolet wavelengths in air

Ghosh, S.; Haefner, J.; Martín-Albo, J.; Guenette, R.; Li, X.; Loya Villalpando, A.A.; Burch, C.; Adams, C.; Álvarez-Puerta, Vicente; Arazi, L.; Arnquist, I.J.; Azevedo, C.D.R.; Bailey, K.; Ballester Merelo, Francisco José; Benlloch-Rodríguez, J.M.; Esteve Bosch, Raul; Herrero Bosch, Vicente; Mora Mas, Francisco José; Rodriguez-Samaniego, Javier; Toledo Alarcón, José Francisco (IOP Publishing, 2020-11-23)

[EN] Polytetrafluoroethylene (PTFE) is an excellent diffuse reflector widely used in light collection systems for particle physics experiments. However, the reflectance of PTFE is a function of its thickness. In this work, ...
Electroluminescence TPCs at the thermal diffusion limit

Henriques, C. A. O.; Monteiro, C. M. B.; Gonzalez-Diaz, D.; Azevedo, C. D. R.; Freitas, E. D. C.; Mano, R. D. P.; Jorge, M. R.; Fernandes, A. F. M.; Gomez-Cadenas, J. J.; Fernandes, L. M. P.; Álvarez-Puerta, Vicente; Ballester Merelo, Francisco José; Esteve Bosch, Raul; Herrero Bosch, Vicente; Mora Mas, Francisco José; Rodriguez-Samaniego, Javier; Toledo Alarcón, José Francisco (Springer-Verlag, 2019-01-03)

[EN] The NEXT experiment aims at searching for the hypothetical neutrinoless double-beta decay from the 136Xe isotope using a high-purity xenon TPC. Efficient discrimination of the events through pattern recognition of the ...
First proof of topological signature in the high pressure xenon gas TPC with electroluminescence amplification for the NEXT experiment

Ferrario, P.; Laing, A.; Lopez-March, N.; Gomez-Cadenas, J. J.; Álvarez-Puerta, Vicente; Azevedo, C. D. R.; Borges, F.I.G.; Carcel, S.; Cebrian, S.; Cervera, A.; C.A.N. Conde; Dafni, T.; Diaz, J.; Diesburg, M.; Esteve Bosch, Raul; Mora Mas, Francisco José; Pérez-Aparicio, José L.; Querol, M.; Rodriguez-Samaniego, Javier; Toledo Alarcón, José Francisco (Springer-Verlag, 2016-01-19)

[EN] The NEXT experiment aims to observe the neutrinoless double beta decay of 136Xe in a high-pressure xenon gas TPC using electroluminescence (EL) to amplify the signal from ionization. One of the main advantages of this ...
Low-diffusion Xe-He gas mixtures for rare-event detection: electroluminescence yield

Fernandes, A.F.M.; Henriques, C.A.O.; Mano, R.D.P.; González-Díaz, D.; Azevedo, C.D.R.; Silva, P.A.O.C.; Gómez-Cadenas, J.J.; Freitas, E.D.C.; Fernandes, L.M.P.; Monteiro, C.M.B.; Adams, C.; Álvarez-Puerta, Vicente; Arazi, L.; Arnquist, I.J.; Bailey, K.; Ballester Merelo, Francisco José; Esteve Bosch, Raul; Herrero Bosch, Vicente; Mora Mas, Francisco José; Rodriguez-Samaniego, Javier; Toledo Alarcón, José Francisco (Springer-Verlag, 2020-04-06)

[EN] High pressure xenon Time Projection Chambers (TPC) based on secondary scintillation (electroluminescence) signal amplification are being proposed for rare event detection such as directional dark matter, double electron ...
Microscopic simulation of xenon-based optical TPCs in the presence of molecular additives

Azevedo, C.D.R.; Gonzalez-Diaz, D.; Biagi, S. F.; Oliveira, C. A. B.; Henriques, C. A. O.; Escada, J.; Monrabal, F.; Gomez-Cadenas, J. J.; Álvarez-Puerta, Vicente; Alvarez, V.; Esteve Bosch, Raul; Herrero Bosch, Vicente; Mora Mas, Francisco José; Querol-Segura, Marc; Rodriguez-Samaniego, Javier; Toledo Alarcón, José Francisco (Elsevier, 2018)

[EN] We introduce a simulation framework for the transport of high and low energy electrons in xenon-based optical time projection chambers (OTPCs). The simulation relies on elementary cross sections (electron-atom and ...
Mitigation of backgrounds from cosmogenic Xe-137 in xenon gas experiments using He-3 neutron capture

Rogers, L.; Jones, B. J. P.; Laing, A.; Pingulkar, S.; Smithers, B.; Woodruff, K.; Adams, C.; Álvarez-Puerta, Vicente; Arazi, L.; Arnquist, I. J.; Azevedo, C. D. R.; Bailey, K.; Ballester Merelo, Francisco José; Benlloch-Rodríguez, J. M.; Borges, F. I. G. M.; Esteve Bosch, Raul; Herrero Bosch, Vicente; Mora Mas, Francisco José; Rodriguez-Samaniego, Javier; Toledo Alarcón, José Francisco (IOP Publishing, 2020-07)

[EN] Xe-136 is used as the target medium for many experiments searching for 0 nu beta beta. Despite underground operation, cosmic muons that reach the laboratory can produce spallation neutrons causing activation of detector ...
Neutral Bremsstrahlung Emission in Xenon Unveiled

Henriques, C.A.O.; Amedo, P.; Teixeira, J. M. R.; González-Díaz, D.; Azevedo, C.D.R.; Para, A.; Martín-Albo,J.; Saa Hernandez, A.; Gómez-Cadenas, J. J.; Nygren, D. R.; Monteiro, C.M.B.; Adams, C.; Álvarez, V.; Arazi, L.; Arnquist, I.J.; Lopez-March, N.; Ballester Merelo, Francisco José; Rodríguez, J.; Esteve Bosch, Raul; Herrero Bosch, Vicente; Mora Mas, Francisco José; Toledo Alarcón, José Francisco (American Physical Society, 2022-04-07)

[EN] We present evidence of non-excimer-based secondary scintillation in gaseous xenon, obtained using both the NEXT-White time projection chamber (TPC) and a dedicated setup. Detailed comparison with first-principle ...
Radio Frequency and DC High Voltage Breakdown of High Pressure Helium, Argon, and Xenon

Woodruff, K.; Baeza-Rubio, J.; Huerta, D.; Jones, B. J. P.; McDonald, A. D.; Norman, L.; Nygren, D. R.; Adams, C.; Álvarez-Puerta, Vicente; Arazi, L.; Arnquist, I. J.; Azevedo, C. D. R.; Bailey, K.; Ballester Merelo, Francisco José; Benlloch-Rodriguez, J. M.; Esteve Bosch, Raul; Herrero Bosch, Vicente; Mora Mas, Francisco José; Rodriguez-Samaniego, Javier; Toledo Alarcón, José Francisco (IOP Publishing, 2020-04)

[EN] Motivated by the possibility of guiding daughter ions from double beta decay events to single-ion sensors for barium tagging, the NEXT collaboration is developing a program of R&D to test radio frequency (RF) carpets ...
Radiogenic backgrounds in the NEXT double beta decay experiment

Novella, P.; Palmeiro, B.; Sorel, M.; Usón, A.; Ferrario, P.; Gómez-Cadenas, J. J.; Adams, C.; Álvarez-Puerta, Vicente; Arazi, L.; Arnquist, I.J.; Azevedo, C.D.R.; Bailey, K.; Ballester Merelo, Francisco José; Benlloch-Rodríguez, J. M.; Borges, F. I. G. M.; Esteve Bosch, Raul; Herrero Bosch, Vicente; Mora Mas, Francisco José; Rodriguez-Samaniego, Javier; Toledo Alarcón, José Francisco (Springer-Verlag, 2019-10-04)

[EN] Natural radioactivity represents one of the main backgrounds in the search for neutrinoless double beta decay. Within the NEXT physics program, the radioactivity- induced backgrounds are measured with the NEXT-White ...
Radiopurity assessment of the energy readout for the NEXT double beta decay experiment

Cebrian, S.; Perez, J.; Bandac, I.; Labarga, L.; Álvarez-Puerta, Vicente; Azevedo, C. D. R.; Benlloch-Rodriguez, J. M.; Borges, F. I. G. M.; Botas, A.; Carcel, S.; Carrión, J.V.; Conde, C. A. N.; Diaz, J.; Diesburg, M.; Escada, J.; Esteve Bosch, Raul; Herrero Bosch, Vicente; Mora Mas, Francisco José; Querol-Segura, Marc; Rodriguez-Samaniego, Javier; Toledo Alarcón, José Francisco (IOP Publishing, 2017-08-21)

[EN] The "Neutrino Experiment with a Xenon Time-Projection Chamber" (NEXT) experiment intends to investigate the neutrinoless double beta decay of 136Xe, and therefore requires a severe suppression of potential backgrounds. ...
Secondary scintillation yield of xenon with sub-percent levels of CO2 additive for rare-event detection

HENRIQUES, C.A.; Freitas, E.D.C.; Azevedo, C.D.R.; González-Díaz, D.; Mano, R.D.P.; Jorge, M.R.; Fernandes, L.M.P.; Monteiro, C.M.B.; Gómez-Cadenas, J.J.; Álvarez-Puerta, Vicente; Benlloch-Rodríguez, J.M.; Borges, F.I.G.M.; Botas, A.; Cárcel García, Sara; Carrión Burguete, José Vicente; Esteve Bosch, Raul; Herrero Bosch, Vicente; Mora Mas, Francisco José; Querol-Segura, Marc; Rodriguez-Samaniego, Javier; Toledo Alarcón, José Francisco (Elsevier, 2017-10-10)

[EN] Xe-CO2 mixtures are important alternatives to pure xenon in Time Projection Chambers (TPC) based on secondary scintillation (electroluminescence) signal amplification with applications in the important field of rare ...
Sensitivity of a tonne-scale NEXT detector for neutrinoless double-beta decay searches

Adams, C.; Alvarez, V.; Arazi, L.; Arnquist, I.J.; Azevedo, C.D.R.; Bailey, K.; Ballester Merelo, Francisco José; Benlloch-Rodriguez, J. M.; Borges, F. I. G. M.; Byrnes, N.; Carcel, S.; Carrión, J.V.; Cebrian, S.; Church, E.; Conde, C. A. N.; Esteve Bosch, Raul; Herrero Bosch, Vicente; Mora Mas, Francisco José; Toledo Alarcón, José Francisco (Springer-Verlag, 2021-08-30)

[EN] The Neutrino Experiment with a Xenon TPC (NEXT) searches for the neutrinoless double-beta (0 nu beta beta) decay of Xe-136 using high-pressure xenon gas TPCs with electroluminescent amplification. A scaled-up version ...
Sensitivity of NEXT-100 to neutrinoless double beta decay

Martín-Albo, J.; Muñoz Vidal, J.; Ferrario, P.; Nebot-Guinot, M.; Gomez-Cadenas, J. J.; Álvarez-Puerta, Vicente; Azevedo, C.D.R.; Borges, F.I.G.; Carcel, S.; Esteve Bosch, Raul; Herrero Bosch, Vicente; Mora Mas, Francisco José; Querol, M.; Rodriguez-Samaniego, Javier; Toledo Alarcón, José Francisco (Springer-Verlag, 2016-05-26)

[EN] NEXT-100 is an electroluminescent high-pressure xenon gas time projection chamber that will search for the neutrinoless double beta (0¿ßß) decay of 136Xe. The detector possesses two features of great value for 0¿ßß ...
Sensitivity of the NEXT experiment to 124-Xe double electron capture

Martinez-Lema, G.; Martinez-Vara, M.; Sorel, M.; Adams, C.; Álvarez-Puerta, Vicente; Arazi, L.; Arnquist, I.J.; Azevedo, C. D. R.; Bailey, K.; Ballester Merelo, Francisco José; Benlloch-Rodriguez, J. M.; Borges, F. I. G. M.; Byrnes, N.; Carcel, S.; Carrión, J. V.; Esteve Bosch, Raul; Herrero Bosch, Vicente; Mora Mas, Francisco José; Rodriguez-Samaniego, Javier; Toledo Alarcón, José Francisco (Springer-Verlag, 2021-02-24)

[EN] Double electron capture by proton-rich nuclei is a second-order nuclear process analogous to double beta decay. Despite their similarities, the decay signature is quite di erent, potentially providing a new channel ...