72 citations · 653 across the 40 of their papers we have counts for
37 papers · 1 filter
Fluorescence Imaging of Individual Ions and Molecules in Pressurized Noble Gases for Barium Tagging in Xe
NEXT Collaboration, N. Byrnes, E. Dey +112
The imaging of individual Ba ions in high pressure xenon gas is one possible way to attain background-free sensitivity to neutrinoless double beta decay and hence establish…
Development of a novel, windowless, amorphous selenium based photodetector for use in liquid noble detectors
M. Rooks, S. Abbaszadeh, J. Asaadi +6
Detection of the vacuum ultraviolet (VUV) scintillation light produced by liquid noble elements is a central challenge in order to fully exploit the available timing, topological,…
Neutral Bremsstrahlung emission in xenon unveiled
C. A. O. Henriques, P. Amedo, J. M. R. Teixeira +90
We present evidence of non-excimer-based secondary scintillation in gaseous xenon, obtained using both the NEXT-White TPC and a dedicated setup. Detailed comparison with first-prin…
Development of a Pulsed VUV Light Source With Adjustable Intensity
A. D. McDonald, M. Febbraro, J. Asaadi +1
This paper describes the development of a pulsed light source using the discharge from an electrode in a medium of various noble gases. This source can be used to aid in the charac…
The Dynamics of Ions on Phased Radio-frequency Carpets in High Pressure Gases and Application for Barium Tagging in Xenon Gas Time Projection Chambers
NEXT Collaboration, B. J. P. Jones, A. Raymond +107
Radio-frequency (RF) carpets with ultra-fine pitches are examined for ion transport in gases at atmospheric pressures and above. We develop new analytic and computational methods f…
Dielectric Strength of Noble and Quenched Gases for High Pressure Time Projection Chambers
L. Norman, K. Silva, B. J. P. Jones +3
Dielectric breakdown strength is one of the critical performance metrics for gases and mixtures used in large, high pressure gas time projection chambers. In this paper we experime…
Boosting background suppression in the NEXT experiment through Richardson-Lucy deconvolution
A. Simón, Y. Ifergan, A. B. Redwine +100
Next-generation neutrinoless double beta decay experiments aim for half-life sensitivities of ~ yr, requiring suppressing backgrounds to <1 count/tonne/yr. For this, any e…
Demonstration of background rejection using deep convolutional neural networks in the NEXT experiment
NEXT Collaboration, M. Kekic, C. Adams +88
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…
Dependence of polytetrafluoroethylene reflectance on thickness at visible and ultraviolet wavelengths in air
S. Ghosh, J. Haefner, J. Martín-Albo +88
Polytetrafluoroethylene (PTFE) is an excellent diffuse reflector widely used in light collection systems for particle physics experiments. However, the reflectance of PTFE is a fun…
Barium Selective Chemosensing by Diazacrown Ether Naphthalimide Turn-on Fluorophores for Single Ion Barium Tagging
P. Thapa, N. K. Byrnes, A. A. Denisenko +9
Single molecule fluorescence detection of barium is investigated for enhancing the sensitivity and robustness of a neutrinoless double beta decay () search in Xe, the…
Sensitivity of a tonne-scale NEXT detector for neutrinoless double beta decay searches
NEXT Collaboration, C. Adams, V. Álvarez +96
The Neutrino Experiment with a Xenon TPC (NEXT) searches for the neutrinoless double-beta decay of Xe-136 using high-pressure xenon gas TPCs with electroluminescent amplification.…
A multi-stop time-of-flight spectrometer for the measurement of positron annihilation-induced electrons in coincidence with the Doppler-shifted annihilation gamma photon
V. A. Chirayath, R. W. Gladen, A. D. McDonald +12
Here we describe an advanced multi functional, variable-energy positron beam system capable of measuring the energies of multiple positron-induced electrons in coincidence with the…
Mitigation of Backgrounds from Cosmogenic Xe in Xenon Gas Experiments using He Neutron Capture
L. Rogers, B. J. P. Jones, A. Laing +89
\Xe{136} is used as the target medium for many experiments searching for \bbnonu. Despite underground operation, cosmic muons that reach the laboratory can produce spallation neutr…
Barium Tagging with Selective, Dry-Functional, Single Molecule Sensitive On-Off Fluorophores for the NEXT Experiment
N. K. Byrnes, A. A. Denisenko, F. W. Foss +5
In the search for neutrinoless double beta decay, understanding and reducing backgrounds is crucial for success. An advance that could drive backgrounds to negligible levels would…
Radio Frequency and DC High Voltage Breakdown of High Pressure Helium, Argon, and Xenon
K. Woodruff, J. Baeza-Rubio, D. Huerta +91
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…
Low-diffusion Xe-He gas mixtures for rare-event detection: Electroluminescence Yield
A. F. M. Fernandes, C. A. O. Henriques, R. D. P. Mano +88
High pressure xenon Time Projection Chambers (TPC) based on secondary scintillation (electroluminescence) signal amplification are being proposed for rare event detection such as d…
Radiogenic backgrounds in the NEXT double beta decay experiment
NEXT Collaboration, P. Novella, B. Palmeiro +88
Natural radioactivity represents one of the main backgrounds in the search for neutrinoless double beta decay. Within the NEXT physics program, the radioactivity-induced background…
Demonstration of the event identification capabilities of the NEXT-White detector
NEXT Collaboration, P. Ferrario, J. M. Benlloch-Rodríguez +88
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 therefor…
Energy calibration of the NEXT-White detector with 1% resolution near Q of Xe
J. Renner, G. Díaz López, P. Ferrario +87
Excellent energy resolution is one of the primary advantages of electroluminescent high pressure xenon TPCs, and searches for rare physics events such as neutrinoless double-beta d…
Barium Chemosensors with Dry-Phase Fluorescence for Neutrinoless Double Beta Decay
P. Thapa, I. Arnquist, N. Byrnes +6
The nature of the neutrino is one of the major open questions in experimental nuclear and particle physics. The most sensitive known method to establish the Majorana nature of the…
Electron Drift and Longitudinal Diffusion in High Pressure Xenon-Helium Gas Mixtures
A. D. McDonald, K. Woodruff, B. Al Atoum +83
We report new measurements of the drift velocity and longitudinal diffusion coefficients of electrons in pure xenon gas and in xenon-helium gas mixtures at 1-9 bar and electric fie…
Progress toward Barium Tagging in High Pressure Xenon Gas with Single Molecule Fluorescence Imaging
N. Byrnes, F. W. Foss, B. J. P Jones +4
We present an update on the development of techniques to adapt Single Molecule Fluorescent Imaging for the tagging of individual barium ions in high pressure xenon gas detectors, w…
Study of the loss of Xenon Scintillation in Xenon-Trimethylamine Mixtures
A. M. F. Trindade, J. Escada, A. F. V. Cortez +75
This work investigates the capability of TMA ((CH3)3N) molecules to shift the wavelength of Xe VUV emission (160-188 nm) to a longer, more manageable, wavelength (260-350 nm). Ligh…
Initial results on energy resolution of the NEXT-White detector
J. Renner, P. Ferrario, G. Martínez-Lema +77
One of the major goals of the NEXT-White (NEW) detector is to demonstrate the energy resolution that an electroluminescent high pressure xenon TPC can achieve for high energy track…