A5009118658- Magnetic confinement fusion research
- Plasma Diagnostics and Applications
- Particle accelerators and beam dynamics
- Fusion materials and technologies
- Superconducting Materials and Applications
- Particle Accelerators and Free-Electron Lasers
- Spacecraft and Cryogenic Technologies
- Atomic and Molecular Physics
- Laser-Plasma Interactions and Diagnostics
- Engineering Applied Research
- Laser-induced spectroscopy and plasma
- Muon and positron interactions and applications
- Nuclear Materials and Properties
- Sensor Technology and Measurement Systems
- Radiation Detection and Scintillator Technologies
- History of Medical Practice
- Neurology and Historical Studies
- Gas Dynamics and Kinetic Theory
- Optical Systems and Laser Technology
- Healthcare Policy and Management
- Nuclear Physics and Applications
- Radiation Therapy and Dosimetry
- Magnetic Field Sensors Techniques
- Metal and Thin Film Mechanics
- GaN-based semiconductor devices and materials
Verus Research (United States)
2024
University of Tennessee at Knoxville
2016-2020
Lockheed Martin (United States)
2020
Oak Ridge National Laboratory
2016-2019
University of Illinois Urbana-Champaign
2018
Knoxville College
2018
American Academy of Neurology
2014
Beth Israel Deaconess Medical Center
2014
Geisinger Medical Center
2014
Rush University Medical Center
2014
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...
Plasma-facing materials in the divertor of a magnetic fusion reactor have to tolerate steady state plasma heat fluxes range 10 MW/m2 for ∼107 s, addition neutron fluences, which can damage plasma-facing high displacements per atom (dpa) ∼50 dpa. Materials solutions needed components are yet be developed and tested. The material exposure experiment (MPEX) is newly proposed linear device designed deliver necessary flux target testing, including capability expose priori neutron-damaged samples...
Proto-MPEX is a linear plasma device being used to study novel RF source concept for the planned Material Plasma Exposure eXperiment (MPEX), which will address plasma-materials interaction (PMI) nuclear fusion reactors. Plasmas are produced using large diameter helicon operating at frequency of 13.56 MHz power levels up 120 kW. In recent experiments has deuterium plasmas with densities ~6 × 1019 m–3 measured location 2 m downstream from antenna and 0.4 target. Previous production on have...
The Prototype Material Plasma Exposure eXperiment (Proto-MPEX) is being used to qualify the plasma source and heating systems for (MPEX). MPEX will address important urgent research needs on material interactions future fusion reactors. In MPEX, plasma-facing components (nonirradiated a priori neutron irradiated) be exposed conditions as they are expected in steady-state device enabled by superconducting magnets, able break into new ground assessing materials at an ion fluence level range of...
The Prototype Material Plasma Exposure eXperiment (Proto-MPEX) at Oak Ridge National Laboratory (ORNL) is a precursor linear plasma device to the (MPEX), which will study material interactions (PMIs) for future fusion reactors. This paper discuss initial steps performed towards completing power balance on Proto-MPEX quantify where energy lost from plasma, including relevant diagnostic package implemented. Machine operating parameters that improve Proto-MPEX’s performance may be identified,...
We present time-resolved measurements of an edge-to-core power transition in a light-ion (deuterium) helicon discharge the form infra-red camera imaging thin stainless steel target plate on Proto-Material Exposure eXperiment device. The images measure two-dimensional distribution deposition discharge. displays mode characterized by significant increase on-axis electron density and core coupling, suppression edge formation fast-wave radial eigenmode. Although self-consistent mechanism that...
High density (≥6 × 1019 m−3), low temperature (2–6 eV) helicon discharges in the Prototype Material Plasma Exposure eXperiment (Proto-MPEX) are analyzed with coupled multifluid plasma, kinetic neutrals code B2.5-Eirene. The interpretative analyses constrained by data from multiple diagnostics, including Langmuir probes, Mach filterscopes, infrared TV system, Thomson scattering, and baratrons. objectives of transport simulations include: investigation effects heating, fueling, plasma...
This paper reports on the observation of controlled underdense electron heating for high heat flux applications in Prototype Material Plasma Exposure eXperiment. The goal this experiment is to demonstrate source and concepts create a intensity plasma at material targets study plasma-material interactions similar conditions magnetic fusion divertors. A 80 kW helicon 13.56 MHz used density production 15 microwave 28 GHz heating. For densities ∼5 × 1018 m−3, temperature target location...
Linear plasma devices are cost-effective alternatives for testing materials under reactor-relevant divertor conditions. An intense radio-frequency (RF) source concept the Material Plasma Exposure eXperiment (MPEX) is development at Oak Ridge National Laboratory. The concept, Proto-MPEX, aims to produce high-density background deuterium helicon plasmas (ne>3×1019 m−3) that subsequently heated with additional RF and microwave systems deliver conditions studies on plasma-material interaction....
Plasma material interaction (PMI) studies are crucial to the successful development of future fusion reactors. Prototype Material Exposure eXperiment (Proto-MPEX) is a prototype design for MPEX, steady-state linear device being developed study PMI. The primary purpose Proto-MPEX developing plasma heating source concepts MPEX. A power accounting works identify machine operating parameters that could improve its performance, thereby increasing PMI research capabilities, potentially impacting...
Ion cyclotron heating (ICH) at a frequency in the 6- to 9-MHz range with electron 28- 105-GHz will be used Material Plasma Exposure eXperiment (MPEX) greatly increase energy of plasma stream produced by helicon source. ICH was chosen over substrate biasing produce energetic ions because it can more accurately reproduce plasma-material interactions fusion device. For instance, when target is tilted respect background magnetic field during ICH, presheath created so that redeposition phenomena...
The Prototype Material Plasma Exposure eXperiment (Proto-MPEX) is a linear device used to develop the source and heating concept for MPEX, an experiment study plasma-material interactions future fusion reactors. This article will highlight recent analysis results on Proto-MPEX using infrared (IR) camera, key tool imaging heat fluxes measured at material target. target are crucial understanding concepts. includes application of homography 3-D finite-element methods provide between-shot...
A plastic scintillator has found extensive application in the realm of high-energy physics and national security science. Many applications those fields often involve simultaneous production photons, neutrons, charged particles, which makes relative sensitivity information for these different radiation types important. In this study, we have adopted a multi-head detector comprised high gain phototubes, provides large dynamic range linearity. comparative study on sensitivities scintillators...
This report considers the recommendations of State Society Task Force (SSTF), which evaluated how relationship between American Academy Neurology (AAN) and neurologic societies individual states can foster care patients with diseases. The task force also role state neurosociety medical society interactions in supporting profession neurology. SSTF recommended that AAN expand current support services to neurosocieties additional development. Specific be considered by include online combined...