Van Graves
A5012334594- Nuclear Physics and Applications
- Particle accelerators and beam dynamics
- Particle Detector Development and Performance
- Neutrino Physics Research
- Magnetic confinement fusion research
- Particle physics theoretical and experimental studies
- Superconducting Materials and Applications
- Fusion materials and technologies
- Astrophysics and Cosmic Phenomena
- Radiation Detection and Scintillator Technologies
- Atomic and Subatomic Physics Research
- Nuclear reactor physics and engineering
- Dark Matter and Cosmic Phenomena
- Muon and positron interactions and applications
- X-ray Diffraction in Crystallography
- Quantum, superfluid, helium dynamics
- Spacecraft and Cryogenic Technologies
- Particle Accelerators and Free-Electron Lasers
- Plasma Diagnostics and Applications
- Crystallography and Radiation Phenomena
- Advanced NMR Techniques and Applications
- Inorganic Fluorides and Related Compounds
- High-pressure geophysics and materials
- Rocket and propulsion systems research
- Advanced Condensed Matter Physics
Oak Ridge National Laboratory
2013-2023
Target (United States)
2022
Linear plasma generators are cost effective facilities to simulate divertor conditions of present and future fusion reactors. They used address important R&D gaps in the science material interactions towards viable facing components for Next generation have be able access expected on targets ITER devices. The steady-state linear device MPEX will this regime with electron temperatures 1–10 eV densities . resulting heat fluxes about 10 MW is designed deliver those a novel Radio Frequency...
This report, prepared for the Community Planning Study - Snowmass 2013 summarizes theoretical motivations and experimental efforts to search baryon number violation, focussing on nucleon decay neutron-antineutron oscillations. Present future experiments using large underground detectors, as well planned oscillation with free neutron beams are highlighted.
Part 2 of "Project X: Accelerator Reference Design, Physics Opportunities, Broader Impacts". In this Part, we outline the particle-physics program that can be achieved with Project X, a staged superconducting linac for intensity-frontier particle physics. Topics include neutrino physics, kaon muon electric dipole moments, neutron-antineutron oscillations, new light particles, hadron structure, spectroscopy, and lattice-QCD calculations. 1 is available as arXiv:1306.5022 [physics.acc-ph] 3...
CENTAUR has been selected as one of the eight initial instruments to be built at Second Target Station (STS) Spallation Neutron Source Oak Ridge National Laboratory. It is a small-angle neutron scattering (SANS) and wide-angle (WANS) instrument with diffraction spectroscopic capabilities. This will maximally leverage high brightness STS source, state-of-the-art optics, suite detectors deliver unprecedented capabilities that enable measurements over wide range length scales excellent...
The VERsatile DIffractometer will set a new standard for world-class magnetic diffractometer with versatility both powder and single crystal samples capability wide-angle polarization analysis. instrument utilize large single-frame bandwidth offer high-resolution at low momentum transfers excellent signal-to-noise ratio. A horizontal elliptical mirror concept interchangeable guide pieces provide high flexibility in beam divergence to allow mode, high-intensity polarized option. major science...
EXPANSE, an EXPanded Angle Neutron Spin Echo instrument, has been proposed and selected as one of the first suite instruments to be built at Second Target Station Spallation Source Oak Ridge National Laboratory. This instrument is designed address scientific problems that involve high-energy resolution (neV-μeV) dynamic processes in a wide range materials. The wide-angle detector banks EXPANSE provide coverage nearly two orders magnitude scattering wavenumbers, wavelength band affords...
CHESS is a new direct-geometry inelastic spectrometer, which planned for the Second Target Station (STS) at Spallation Neutron Source (SNS) in Oak Ridge. It will take full advantage of increased peak brilliance high-brightness STS coupled moderators and recent advances instrument design technology to achieve unprecedented performance scattering cold energy range. This paper presents conceptual that addresses key requirements technical solutions are derived directly from science case...
The properties of the neutrino provide a unique window on physics beyond that described by standard model. study subleading effects in oscillations, and race to discover CP-invariance violation lepton sector, has begun with recent discovery ${\ensuremath{\theta}}_{13}>0$. measured value ${\ensuremath{\theta}}_{13}$ is large, emphasizing need for facility at which systematic uncertainties can be reduced percent level. factory, intense beams are produced from decay muons, been shown outperform...
Materials engineering by neutron scattering (MENUS) at the second target station will be a transformational high-flux, versatile, multiscale materials diffraction beamline with unprecedented new capabilities for study of complex and structures. It support both fundamental applied research in broad range fields. MENUS combine long-wavelength flux unique detector coverage to enable real-time studies structural functional under external stimuli. The incorporated small angle transmission/imaging...
We describe an experiment designed as a proof-of-principle test for target system capable of converting 4-MW proton beam into high-intensity muon suitable incorporation either neutrino factory complex or collider. The is based on exposing free mercury jet to intense in the presence high-strength solenoidal magnetic field.
Understanding the science of plasma-material interactions (PMI) is essential for future development fusion facilities. The design divertors and first walls next generation long-pulse facilities, such as a Fusion Nuclear Science Facility (FNSF) or DEMO, requires significant PMI research development. In order to meet this need, new linear plasma facility, Materials Plasma Exposure Experiment (MPEX) proposed, which will produce divertor relevant conditions these device be capable handling low...
There will be 50 diagnostic systems installed on ITER. All have been implemented with great success experimental fusion reactors around the world. Despite this deep experience, implementation of ITER remains very challenging. Structural, nuclear and optical engineering challenges arise from loads that are at least an order magnitude higher last for much longer than any previous experiment. Complicating challenge is acceleration design process because delivered to must ready full power D-T...
The divertor-specific ITER Diagnostic Residual Gas Analyzer (DRGA) will provide essential information relating to DT fusion plasma performance. This includes pulse-resolving measurements of the fuel isotopic mix reaching pumping ducts, as well concentration helium generated ash reaction. In present baseline design, cluster sensors attached this diagnostic's differentially pumped analysis chamber assembly a radiation compatible version commercial quadrupole mass spectrometer, an optical gas...
We test a target concept devised for the purpose of producing copious secondary pions and capturing muon decay products. This experiment is designed to system neutrino factory or collider consists free flowing mercury stream embedded in high-field solenoid. Key components are described.
An optical diagnostic system is designed and constructed for imaging a free mercury jet interacting with high intensity proton beam in pulsed high-field solenoid magnet. The employs backilluminated, laser shadow photography technique. Object illumination image capture are transmitted through radiation-hard multimode fibers flexible coherent fibers. A retroreflected design allows the entire passive to fit inside bore of sequence synchronized short light pulses used freeze transient events,...
The design and operational testing of a mercury jet delivery system is presented. equipment part the Mercury Intense Target (MERIT) Experiment, which proof-of-principle experiment to be conducted at CERN in summer 2007 determine feasibility using an unconstrained as target Neutrino Factory or Muon Collider. Hg capable producing 1 cm diameter, 20 m/s inside high-field solenoid magnet. A high-speed optical diagnostic allows observation interaction with 24 GeV proton beam. Performance will...