A5102968849- Neutrino Physics Research
- Dark Matter and Cosmic Phenomena
- Particle physics theoretical and experimental studies
- Astrophysics and Cosmic Phenomena
- Atomic and Subatomic Physics Research
- Radiation Detection and Scintillator Technologies
- Particle Detector Development and Performance
- Quantum, superfluid, helium dynamics
- Climate Change Communication and Perception
- Nuclear Physics and Applications
- Cold Atom Physics and Bose-Einstein Condensates
- Disability Education and Employment
- Behavioral and Psychological Studies
- Advanced NMR Techniques and Applications
- Wind Energy Research and Development
- Pulsed Power Technology Applications
- Real-time simulation and control systems
- Byzantine Studies and History
- Virtual Reality Applications and Impacts
- Wind Turbine Control Systems
- Laser Design and Applications
- Welding Techniques and Residual Stresses
- Spectroscopy and Laser Applications
- X-ray Spectroscopy and Fluorescence Analysis
- Medieval Literature and History
Duke University
2020-2025
Occidental College
2009
Northrop Grumman (United States)
1982-1983
We report the first measurement of coherent elastic neutrino-nucleus scattering (CEvNS) on argon using a liquid detector at Oak Ridge National Laboratory Spallation Neutron Source. Two independent analyses prefer CEvNS over background-only null hypothesis with greater than $3\ensuremath{\sigma}$ significance. The measured cross section, averaged incident neutrino flux, is $(2.2\ifmmode\pm\else\textpm\fi{}0.7)\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}39}\text{ }\text{...
We measured the cross section of coherent elastic neutrino-nucleus scattering (CEvNS) using a CsI[Na] scintillating crystal in high flux neutrinos produced at Spallation Neutron Source Oak Ridge National Laboratory. New data collected before detector decommissioning have more than doubled dataset since first observation CEvNS, achieved with this detector. Systematic uncertainties also been reduced an updated quenching model, allowing for improved precision. With these analysis improvements,...
The COHERENT Collaboration searched for scalar dark matter particles produced at the Spallation Neutron Source with masses between 1 and 220 MeV/c^{2} using a CsI[Na] scintillation detector sensitive to nuclear recoils above 9 keV_{nr}. No evidence is found we thus place limits on allowed parameter space. With this low-threshold detector, are coherent elastic scattering nuclei. cross section process orders of magnitude higher than other processes historically used accelerator-based...
The COHERENT experiment is well poised to test sub-GeV dark matter models using low-energy recoil detectors sensitive coherent elastic neutrino-nucleus scattering (CEvNS) in the $\pi$-DAR neutrino beam produced by Spallation Neutron Source. We show how a planned 750-kg liquid argon scintillation detector would place leading limits on scalar light models, over two orders of magnitude mass, for particles through vector and leptophobic portals absence other effects beyond standard model....
The Spallation Neutron Source (SNS) at Oak Ridge National Laboratory is a pulsed source of neutrons and, as by-product this operation, an intense neutrinos via stopped-pion decay. COHERENT collaboration uses to investigate coherent elastic neutrino-nucleus scattering and other physics with suite detectors. This work includes description our geant4 simulation neutrino production the SNS flux calculation which informs studies. We estimate uncertainty $\ensuremath{\sim}10%$ level based on...
We report on the technical design and expected performance of a 592 kg heavy-water-Cherenkov detector to measure absolute neutrino flux from pion-decay-at-rest source at Spallation Neutron Source (SNS) Oak Ridge National Laboratory (ORNL). The will be located roughly 20 m SNS target with better than 5% statistical uncertainty in 2 years. This heavy-water serve as first module two-module system ultimately 2-3% both First Target Station planned Second SNS. significantly reduce dominant...
We report the first detection of coherent elastic neutrino-nucleus scattering (CEvNS) on germanium, measured at Spallation Neutron Source Oak Ridge National Laboratory. The Ge-Mini detector COHERENT collaboration employs large-mass, low-noise, high-purity germanium spectrometers, enabling excellent energy resolution, and an analysis threshold 1.5 keV electron-equivalent ionization energy. observe a on-beam excess 20.6$_{+7.1}^{-6.3}$ counts with total exposure 10.22 GWhkg we reject no-CEvNS...
Abstract We present results of several measurements CsI[Na] scintillation response to 3–60 keV energy nuclear recoils performed by the COHERENT collaboration using tagged neutron elastic scattering experiments and an endpoint technique. Earlier results, used estimate coherent neutrino-nucleus (CEvNS) event rate for first observation this process achieved at Spallation Neutron Source (SNS), have been reassessed. discuss corrections identified systematic effects update respective uncertainty...
We present the analysis and results of first dataset collected with MARS neutron detector deployed at Oak Ridge National Laboratory Spallation Neutron Source (SNS) for purpose monitoring characterizing beam-related (BRN) background COHERENT collaboration. was positioned next to COH-CsI coherent elastic neutrino-nucleus scattering in SNS basement corridor. This is location closest proximity target thus, highest neutrino flux, but it also well shielded from BRN flux by infill concrete gravel....
The Spallation Neutron Source (SNS) at Oak Ridge National Laboratory is a pulsed source of neutrons and, as byproduct this operation, an intense neutrinos via stopped-pion decay. COHERENT collaboration uses to investigate coherent elastic neutrino-nucleus scattering and other physics with suite detectors. This work includes description our Geant4 simulation neutrino production the SNS flux calculation which informs studies. We estimate uncertainty about 10% based on validation against...
This report summarizes the current status of neutrino physics and broad exciting future prospects identified for Neutrino Frontier as part 2021 Snowmass Process.
We present results of several measurements CsI[Na] scintillation response to 3-60 keV energy nuclear recoils performed by the COHERENT collaboration using tagged neutron elastic scattering experiments and an endpoint technique. Earlier results, used estimate coherent neutrino-nucleus (CEvNS) event rate for first observation this process achieved at Spallation Neutron Source (SNS), have been reassessed. discuss corrections identified systematic effects update respective uncertainty values....
This project focuses on the exploration of an architectural visualisation virtual reality (VR) prototyping and creative thinking process with use consumer accessible electroencephalogram (EEG). Architectural engaging interactive user experience is area which requires careful considerations during design construction VR content, aims to promote intuitive simulated environment. study involves collaboration between several architecture designers researchers, forms a multidisciplinary research...
An excimer laser is described with a gain volume of 20 cm3 and capable repetition rates on the order 10 Hz using simple pulse-charge circuit gas flow loop. With mixtures typical XeCl species, maximum single-pulse output energies 15 mJ are obtained at charge voltages 30 kV run times hours for single fill.
We report on the preparation of and calibration measurements with a $^{83\mathrm{m}}$Kr source for CENNS-10 liquid argon detector. atoms generated in decay $^{83}$Rb were introduced into detector via injection Ar circulation loop. Scintillation light arising from 9.4 keV 32.1 conversion electrons volume then observed. This allows characterization low-energy response is applicable to other low-energy-threshold detectors. The energy resolution was measured be 9$\%$ at total 41.5 keV. performed...
The COHERENT collaboration searched for scalar dark matter particles produced at the Spallation Neutron Source with masses between 1 and 220~MeV/c$^2$ using a CsI[Na] scintillation detector sensitive to nuclear recoils above 9~keV$_\text{nr}$. No evidence is found we thus place limits on allowed parameter space. With this low-threshold detector, are coherent elastic scattering nuclei. cross section process orders of magnitude higher than other processes historically used accelerator-based...
The Snowmass Community Survey was designed by the Early Career (SEC) Core Initiative team between April 2020 and June 2021, released to community on 28, 2021. It aims be a comprehensive assessment of state high-energy particle astrophysics (HEPA) community, if not field, though process is largely based within United States. Among other topics, some central foci were gather demographic, career, physics outlook, workplace culture data large segment community. With nearly $1500$ total...
The Snowmass 2021 strategic planning process provided an essential opportunity for the United States high energy physics and astroparticle (HEPA) community to come together discuss upcoming goals experiments. As this forward-looking perspective on field often reaches far enough into future surpass timescale of a single career, consideration next generation physicists is crucial. Early Career (SEC) organization aimed unite group, with purpose both educating newest while informing senior their...
Description of the data release 10.13139/OLCF/1969085 (https://doi.ccs.ornl.gov/ui/doi/426) from measurements CsI[Na] response to low energy nuclear recoils by COHERENT collaboration. The corresponds results published in "D. Akimov et al 2022 JINST 17 P10034". We share form raw ADC waveforms, provide benchmark values, and plots enhance transparency reproducibility our results. This document describes contents as well guidance on use data.
A simple, multichannel surface switch has been developed suitable for pulse generators commonly used TEA laser excitation. Switch voltages over the range 15–35 kV were successfully tested. Low energy, auxiliary discharge triggering was found to increase arc channel number density under some circumstances.