A5084210138- Nuclear Physics and Applications
- Radiation Detection and Scintillator Technologies
- Nuclear reactor physics and engineering
- Atomic and Subatomic Physics Research
- Particle accelerators and beam dynamics
- Quantum, superfluid, helium dynamics
- Advanced NMR Techniques and Applications
- Radiation Therapy and Dosimetry
- Nuclear Materials and Properties
- High-pressure geophysics and materials
- Neutrino Physics Research
- Graphite, nuclear technology, radiation studies
- Fusion materials and technologies
- Magnetic confinement fusion research
- Muon and positron interactions and applications
- Solid-state spectroscopy and crystallography
- Engineering Applied Research
- Hydrogen Storage and Materials
- Dark Matter and Cosmic Phenomena
- Mesoporous Materials and Catalysis
- Zeolite Catalysis and Synthesis
- Acoustic Wave Resonator Technologies
- Aerogels and thermal insulation
- Particle physics theoretical and experimental studies
- Pulsed Power Technology Applications
European Spallation Source
2016-2024
Los Alamos National Laboratory
2005-2019
University of Tennessee at Knoxville
2015
Graz University of Technology
1995
The violation of Baryon Number, $\mathcal{B}$, is an essential ingredient for the preferential creation matter over antimatter needed to account observed baryon asymmetry in universe. However, such a process has yet be experimentally observed. HIBEAM/NNBAR %experiment program proposed two-stage experiment at European Spallation Source (ESS) search number violation. will include high-sensitivity searches processes that violate by one or two units: free neutron-antineutron oscillation...
Interaction of molecular hydrogen with the surface ortho–para conversion catalyst.
The European Spallation Source being constructed in Lund, Sweden will provide the user community with a neutron source of unprecedented brightness. By 2025, suite 15 instruments be served by high-brightness moderator system placed above spallation target. ESS infrastructure, consisting proton linac, target station, and instrument halls, allows for implementation second below We propose to develop high-intensity able (1) deliver larger total cold flux, (2) high intensities at longer...
A key aim of the HighNESS project for European Spallation Source is to enable cutting-edge particle physics experiments. This volume presents a conceptual design report NNBAR experiment. would exploit new cold lower moderator make first search in over thirty years free neutrons converting anti-neutrons. The observation such baryon-number-violating signature be fundamental significance and tackle open questions modern physics, including origin matter-antimatter asymmetry. shows beamline,...
We present recent developments of improved modelling methods for simulating neutron transport in reflector materials interest source applications. These include to be used as traditional reflectors around the moderator, such beryllium, and also novel materials, nanodiamond particles, a very-cold neutrons beam extraction area scattering instrument. Of particular is inclusion physical effects that are not modelled standard thermal libraries Monte-Carlo simulations, extinction beryllium...
The European Spallation Source (ESS), presently under construction in Lund, Sweden, is a multidisciplinary international laboratory that, once completed at full specifications, will operate the world's most powerful pulsed neutron source. Supported by 3 M Euro Research and Innovation Action within Union Horizon 2020 program, design study (HighNESS) now underway to develop second source located below spallation target. Compared first source, which above target designed for high cold thermal...
The physics model of a next-generation spallation-driven high-current ultracold neutron (UCN) source capable delivering an extracted UCN rate around an-order-of-magnitude higher than the strongest proposed sources, and three-orders-of-magnitude existing is presented. This UCN-current-optimized would dramatically improve cutting-edge measurements that are currently statistically limited. A novel "Inverse Geometry" design used with 40 L superfluid $^4$He (He-II), which acts as converter cold...
The European Spallation Source, currently under construction in Lund, Sweden, is a multidisciplinary international laboratory. Once completed to full specifications, it will operate the world’s most powerful pulsed neutron source. Supported by 3 million Euro Research and Innovation Action within EU Horizon 2020 program, design study (HighNESS) has been develop second source located below spallation target. Compared first source, designed for high cold thermal brightness, new optimized...
The Target/Moderator/Reflector (TMR) system at the Low Energy Neutron Source has a flexible design in order to accommodate research into performance of neutron moderators general and small-scale accelerator-driven sources particular. Since producing its first cold beam April 2005, LENS TMR undergone number changes, been used investigate novel moderator ideas. In this paper we summarize impact some these changes on as well recent results from inhomogeneous that combines traditional moderating...
Novel beam-intercepting materials and targetry concepts are essential to improve the performance, reliability operation lifetimes of next generation multi-megawatt (multi-MW) accelerator target facilities. The components must sustain an order-of-magnitude increase in particle beam intensities beyond current state-of-the-art. With conventional already limiting scope experiments, it is crucial investigate novel materials, technologies that will satisfy requirements maximize physics benefits...
In this paper we present results of combining ring-polymer molecular dynamics with the LEAPR and THEMR modules NJOY to generate thermal neutron scattering libraries for liquid para-hydrogen ortho-deuterium. We methodology show that it produces are in good agreement data from both recent available measurements previous theoretical studies. also some simple benchmark Monte-Carlo simulations compared other libraries.
Beryllium reflectors are used at spallation neutron sources in order to enhance the low-energy flux of neutrons emanating from surface a cold and thermal moderator. The design such moderator/reflector system is typically carried out using detailed Monte-Carlo simulations, where beryllium reflector assumed behave as poly-crystalline material. In reality, however, inhomogeneities could lead discrepancies between performance actual when compared modeled system. dependence total cross-section...