A5021293930- Magnetic confinement fusion research
- Plasma Diagnostics and Applications
- Particle accelerators and beam dynamics
- Granular flow and fluidized beds
- Drug Solubulity and Delivery Systems
- Mineral Processing and Grinding
- Laser-Plasma Interactions and Diagnostics
- Fusion materials and technologies
- Superconducting Materials and Applications
- Ionosphere and magnetosphere dynamics
- Atomic and Subatomic Physics Research
- Powder Metallurgy Techniques and Materials
- Protein purification and stability
- Nuclear Physics and Applications
- Crystallization and Solubility Studies
- Semiconductor materials and devices
- Fault Detection and Control Systems
- Atomic and Molecular Physics
- Spectroscopy and Chemometric Analyses
- Nuclear reactor physics and engineering
- Laser Design and Applications
- Metal and Thin Film Mechanics
- Advanced Statistical Process Monitoring
- Superconducting and THz Device Technology
- Innovative Microfluidic and Catalytic Techniques Innovation
UCB Pharma (Belgium)
2019-2023
Ghent University
2016-2021
Laboratoire Réactions et Génie des Procédés
2019
Université de Lorraine
2014
University of Maryland, College Park
1978-1990
AT&T (United States)
1989-1990
Princeton Plasma Physics Laboratory
1979-1989
Oak Ridge National Laboratory
1985-1989
Princeton University
1979-1987
United States Department of Energy
1987
Neutral-beam heating of plasmas in the Tokamak Fusion Test Reactor at low preinjection densities [${n}_{e}$(0)\ensuremath{\simeq}${10}^{19}$ ${\mathrm{m}}^{\mathrm{\ensuremath{-}}3}$] were characterized by ${T}_{e}$(0)=6.5 keV, ${T}_{i}$(0)=20 ${n}_{e}$(0)=7\ifmmode\times\else\texttimes\fi{}${10}^{19}$ ${\mathrm{m}}^{\mathrm{\ensuremath{-}}3}$, ${\ensuremath{\tau}}_{E}$=170 msec, ${\ensuremath{\beta}}_{\mathrm{theta}}$=2, and a d(d,n${)}^{3}$He neutron emission rate ${10}^{16}$...
Experimental results from high-power neutral-beam-injection experiments on the Princeton Large Torus tokamak are reported. At highest beam powers (2.4 MW) and lowest plasma densities [${n}_{e}(0)=5\ifmmode\times\else\texttimes\fi{}{10}^{13}$ ${\mathrm{cm}}^{\ensuremath{-}3}$], ion temperatures of 6.5 keV achieved. The collisionality ${{\ensuremath{\nu}}_{i}}^{*}$ drops below 0.1 over much radial profile. Electron heating $\frac{\ensuremath{\Delta}{T}_{e}}{{T}_{e}}\ensuremath{\approx}50%$ has...
The synchrotron radiation emitted from the adiabatic toroidal compressor (ATC) tokamak plasma along a major radius was measured over band of frequencies ($35 \mathrm{GHz}<f<450 \mathrm{GHz}$ with resolution $\frac{f}{\ensuremath{\Delta}f}\ensuremath{\approx}2$ and rise time $\ensuremath{\tau}<10$ \ensuremath{\mu}sec) that included electron cyclotron frequency its first few harmonics. is at least 50% polarized...
The TFTR tokamak has reached its original machine design specifications (Ip=2.5 MA and BT=5.2 T). Recently, the D degrees neutral beam heating power been increased to 6.3 MW. By operating at low plasma current (Ip approximately=0.8 MA) density (ne approximately=1*1019 m-3), high ion temperatures (9+or-2 keV) rotation speeds (7*105 m/s) have achieved during injection. At opposite extreme, pellet injection into plasmas used increase line-average 8*1019 m-3 central 1.6*1020 m-3. This wide range...
Absorber foils have been installed in the TFTR X-Ray Imaging System to permit measurement of electron temperature (Te) along 10–30 chords, spaced at 5–12.5 cm, with a time resolution less than 100 μs. The technique uses ratio X-ray fluxes transmitted through two different foils, which depends mainly on Te. Simulations show that strong impurity line radiation can distort this ratio. Good accuracy is obtained simple beryllium filters, provided corrections are incorporated analysis, taking...
New long-pulse ion sources have been employed to extend the neutral beam pulse on TFTR from 0.5 sec 2.0 sec. This made it possible study long-term evolution of supershots at constant current and perform experiments in which plasma was ramped up during heating pulse. Experiments were conducted with co counter injection as well nearly balanced deuterium beams a total power 20 MW. The best results, i.e., central temperatures Tio > 25 keV neo τE values 3 × 1020 m-3, obtained injection. toroidal...
Electron heat transport on TFTR and other tokamaks is several orders of magnitude larger than neoclassical calculations predict. Despite considerable effort, there still no clear theoretical understanding this anomalous transport. The electron temperature profile, Te(r), has shown a marked consistency many machines for wide range plasma parameters heating profiles. This could be an important clue as to the process responsible enhanced thermal In first section paper result presented that...
In July 1984, a Fourier transform spectrometer employing fast-scanning Michelson interferometer began operating on TFTR. This diagnostic system can measure the electron cyclotron emission spectrum 72 times per s with time resolution of 11 ms and spectral 3.6 GHz. The initial range is 75–540 GHz, which adequate for measuring first three harmonics at present TFTR magnetic field levels. be extended easily to 75–1080 GHz in order accommodate increases toroidal or study superthermal ECE. measured...
A grating polychromator and Fourier transform spectrometer have been used to study the electron cyclotron radiation emitted by PLT plasma. Results are presented which illustrate power of these diagnostics in following spatial temporal changes plasma temperature. Specifically, data showing heating during neutral beam injection, fluctuations associated with sawteeth, m = 2 oscillations, minor disruptions as well affected from runaway electrons presented. detailed comparison temperature...
The paper presents a study of impurity transport in ohmically heated TFTR plasmas by computer modelling VUV line emissions from impurities injected using the laser blow-off technique. results are sensitive to uncertainties ionization and recombination rates used and, therefore, only spatially averaged diffusion coefficient parameterized convective velocity can be measured. Measurements these parameters presented for deuterium helium discharges with Ip = 0.8−2.5 MA, e (0.6-6.0) × 1019 m−3...