A5012298360- Magnetic confinement fusion research
- Plasma Diagnostics and Applications
- Particle accelerators and beam dynamics
- Fusion materials and technologies
- Superconducting Materials and Applications
- Laser-Plasma Interactions and Diagnostics
- Metal and Thin Film Mechanics
- Laser-induced spectroscopy and plasma
- Muon and positron interactions and applications
- Advanced Sensor Technologies Research
- Electron and X-Ray Spectroscopy Techniques
- Engineering Applied Research
- Particle Accelerators and Free-Electron Lasers
- Nuclear Materials and Properties
- Advancements in Photolithography Techniques
- Atomic and Molecular Physics
- Ionosphere and magnetosphere dynamics
- Advanced X-ray Imaging Techniques
- Magnetic Field Sensors Techniques
Oak Ridge National Laboratory
2017-2024
University of Tennessee at Knoxville
2017-2021
University of Illinois Urbana-Champaign
2021
Pennsylvania State University
2021
Knoxville College
2018
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...
The Prototype-Material Plasma Exposure eXperiment (Proto-MPEX) linear plasma device is a test bed for exploring and developing source concepts to be employed in the future steady-state Material (MPEX) that will study plasma-material interactions nuclear fusion program. concept foresees using helicon supplemented with electron ion heating systems reach necessary conditions. In this paper, we discuss temperature measurements obtained from Doppler broadening of spectral lines argon particles....
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 Materials Plasma Exposure eXperiment (MPEX) is a linear plasma device that will address the plasma-material interaction (PMI) science for future fusion reactors and enable testing of plasma-facing components (PFCs). It designed as steady-state eventually delivering an ion fluence up to 10 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">31</sup> m xmlns:xlink="http://www.w3.org/1999/xlink">-2</sup> target. be handle neutron-activated...
The light-ion helicon plasma source of the Proto-MPEX linear device has been recently upgraded to enable pulsed (0.5–1 s) operation up 200 kW. main objective this work is report on plasma-induced surface heat fluxes incident window during high power (60–150 kW net power) for purpose design upcoming material exposure eXperiment (MPEX). IR imaging system and associated physics models extraction are presented. Experimental results demonstrate that control strike point via magnetic flux mapping...
The pulsed linear plasma device Prototype Material Plasma Exposure eXperiment (Proto-MPEX) uses a radio frequency (RF) helicon antenna with an aluminum nitride ceramic window for production. RF sheath created under the is sufficient to cause ion impact energies be greater than sputtering threshold of AlN material and impurities created. Here, we investigate on inner diameter its impurity production rates in Proto-MPEX. Three models—a 3D COMSOL finite element model Proto-MPEX region,...
The physics of ion cyclotron heating (ICH) relevant to the steady-state linear machine MPEX (Material Plasma Exposure eXperiment) has been explored in its predecessor, short-pulse device: Proto-MPEX. will utilize fundamental ICH increase heat flux at target and produce temperatures velocity distributions with improved fidelity those found a tokamak divertor region, comparison produced by substrate biasing. In experiments on Proto-MPEX described here, bulk up ∼ 15 eV have achieved 20 kW net...
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...
The Prototype Material Plasma Exposure eXperiment (Proto-MPEX) is a pulsed linear plasma device that uses radio frequency (RF) helicon antenna and ceramic window as the ionization source. Modeling performed within this work on operations predicts hot spots due to an RF-induced sheath. RF sheath potential leads physical sputtering of predominantly where sits around window. role oxygen in Proto-MPEX also investigated needed match experimental data. Experiments show reasonable agreement with...
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 sheared-flow-stabilized (SFS) Z-pinch concept is on a path to commercialization at Zap Energy. Recent experiments the Fusion Experiment (FuZE) and newly commissioned FuZE-Q devices are advancing state of art in pinch current, stable plasma duration, deuterium–deuterium fusion neutron production. SFS configuration offers promise compact device owing its simple geometry, unity beta, absence external magnetic field coils. In addition robust experimental program pushing performance toward...
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...
The Prototype Material Plasma Exposure eXperiment (Proto-MPEX) is a linear plasma device being used in source research and development (R&D) for the proposed MPEX. Once R&D completed, this can also be to perform plasma–material interaction studies. To these studies, new materials analysis particle probe (MAPP) has been constructed. MAPP’s components are sample holder manipulator custom vacuum chamber with ports facilitate surface chemistry diagnostics. overall design enables rapid...