A5105348321- Particle accelerators and beam dynamics
- Magnetic confinement fusion research
- Fusion materials and technologies
- Plasma Diagnostics and Applications
- Laser-Plasma Interactions and Diagnostics
- Plasma Applications and Diagnostics
- Ionosphere and magnetosphere dynamics
- Electrohydrodynamics and Fluid Dynamics
- Diamond and Carbon-based Materials Research
- Cold Atom Physics and Bose-Einstein Condensates
- Carbon dioxide utilization in catalysis
- Atomic and Subatomic Physics Research
- Full-Duplex Wireless Communications
- Superconducting Materials and Applications
- Advanced materials and composites
- High voltage insulation and dielectric phenomena
- Nuclear Physics and Applications
- Dust and Plasma Wave Phenomena
- Advanced Materials Characterization Techniques
- Quantum Information and Cryptography
- Quantum Electrodynamics and Casimir Effect
- Cold Fusion and Nuclear Reactions
- Particle Accelerators and Free-Electron Lasers
- Solar and Space Plasma Dynamics
- Metal and Thin Film Mechanics
Busek (United States)
2025
University of Alabama
2024
Daresbury Laboratory
2006
Princeton Plasma Physics Laboratory
1992-1998
Princeton University
1994-1998
Troitsk Institute for Innovation and Fusion Research
1994
Advanced Science Research Center
1994
Massachusetts Institute of Technology
1994
Plasma Technology (United States)
1994
Fusion Academy
1994
Peak fusion power production of 6.2\ifmmode\pm\else\textpm\fi{}0.4 MW has been achieved in TFTR plasmas heated by deuterium and tritium neutral beams at a total 29.5 MW. These have an inferred central alpha particle density 1.2\ifmmode\times\else\texttimes\fi{}${10}^{17}$ ${\mathrm{m}}^{\mathrm{\ensuremath{-}}3}$ without the appearance either disruptive magnetohydrodynamics events or detectable changes Alfv\'en wave activity. The measured loss rate energetic particles agreed with...
The Tokamak Fusion Test Reactor (TFTR) (R. J. Hawryluk, to be published in Rev. Mod. Phys.) experiments on high-temperature plasmas, that culminated the study of deuterium–tritium D–T plasmas containing significant populations energetic alpha particles, spanned over two decades from conception completion. During design TFTR, key physics issues were magnetohydrodynamic (MHD) equilibrium and stability, plasma energy transport, impurity effects, reactivity. Energetic particle was given less...
The Tomamak Fusion Test reactor has performed initial high-power experiments with the plasma fueled nominally equal densities of deuterium and tritium. Compared to pure plasmas, energy stored in electron ions increased by \ensuremath{\sim}20%. These increases indicate improvements confinement associated use tritium possibly heating electrons \ensuremath{\alpha} particles created D-T fusion reactions.
The Tokamak Fusion Test Reactor (TFTR) is a large tokamak which has performed experiments with 50:50 deuterium - tritium fuelled plasmas. Since 1993, TFTR produced about 1090 D T plasmas using 100 grams of and producing 1.6 GJ fusion energy. These have significant populations 3.5 MeV alphas (the charged product). research focused on alpha particle confinement, driven modes, heating studies. Maximum power production aided these studies, requiring simultaneously operation at high input energy...
Two surface wave plasma columns, generated by microwave power in argon at gas pressures of 0.05 torr to 330 torr, interact the same discharge tube form standing waves. Radial electric field Er and azimuthal magnetic Hϕ outside are measured be 90° out phase with respect axial position decay exponentially radial distance from axis. Maximum light emission occurs maximum Hϕ, minimum Er. Electron temperature density low double probes inserted into a null Measured electron densities compare well...
In this study, the authors investigate erosive effects of iodine plasma on molybdenum. By exposing molybdenum samples to three different test cases vapor, plasma, and argon enhancement erosion was characterized. A roughly exponential behavior with respect temperature found in at hollow cathode conditions rates as high 70.1 ± 7.7 μm/h. Despite an oxygen content <1%, evidence oxidation all cases. Behavior consistent preferential based grain orientation
Experiments in the Tokamak Fusion Test Reactor (TFTR) [Phys. Plasmas 2, 2176 (1995)] have explored several novel regimes of improved tokamak confinement deuterium–tritium (D–T) plasmas, including plasmas with reduced or reversed magnetic shear core and high-current increased outer region (high li). New techniques also been developed to enhance these by modifying plasma-limiter interaction through situ deposition lithium. In reversed-shear transitions enhanced observed at plasma currents up...
A summary is presented of recent alpha-particle experiments on the tokamak fusion test reactor. Alpha particles are generally well confined in MHD-quiescent discharges, and alpha heating electrons has been observed. The theoretically predicted toroidicity-induced Alfvén eigenmode seen discharges power, but only plasmas with weak magnetic shear.
Routine tritium operation in TFTR has permitted investigations of alpha particle physics parameter ranges resembling those a reactor core. ICRF wave DT plasma and the influence isotopic mass on supershot confinement have also been studied. Continued progress made optimizing fusion power production TFTR, using extended machine capability Li wall conditioning. Performance is currently limited by MHD stability. A new reversed magnetic shear regime being investigated with reduced core transport...
Three campaigns, prior to July 1994, attempted increase the fusion power in DT plasmas on Tokamak Fusion Test Reactor (TFTR). The first campaign was dedicated obtaining >5 MW of while avoiding MHD events similar JET X-event. second aimed at producing maximum irrespective proximity limits, and achieved 9 limited by a disruption. third increased energy confinement time using lithium pellet conditioning raising ratio alpha heating beam heating.
During the D-T campaign on TFTR, safe and successful operation has been demonstrated with tritium fuel enabling a broad range of physics studies. Transport studies have focused formation internal transport barriers in enhanced reversed shear regime. Current profile modification employed to study MHD stability both high ℓi discharges. Several important alpha topics studied including confinement loss particles quiescent active discharges effect alpha-particle heating destabilization TAE modes....
The use of ICRF heating in plasmas containing a mixture deuterium and tritium has been explored on the TFTR tokamak. A detailed exploration at second harmonic cyclotron resonance carried out. Effective central demonstrated even competition with additional edge absorption mechanisms. new regime effective via enhanced mode conversion to an ion Bernstein wave (IBW) demonstrated. This allows both off axis electron current drive. interaction waves alpha particles investigated. threshold for...
Design problems and procedures associated with microwave plasma sources are applied to cylindrical plasmas inside coaxial cavities. The experimental performance of these cavities is presented. Measurements electron density temperature for several inert gases, different tube diameters pressures presented compared positive column discharge theories. Results show that densities in excess 10 the 12th/cu cm easily produced from S band energy. potential ion engines evaluated.
Two Superconducting RF modules of the ELBE type have been ordered from Accel Instruments GmbH for use on Energy Recovery Linac Prototype (ERLP) being built at Daresbury Laboratory. One structure is to be used as a booster module, with an energy gain 8 MeV, and other act recovery linac operating electron beam up 35 MeV. High power couplers capable handling 10 kW CW are required provide successful operation ERLP. Once received four including windows will conditioned tested FZR Dresden; this...
Measurements of electron density and electric field strength have been made in an argon plasma contained a resonant microwave cavity at 2.45 GHz. Spatial measurements density, n sub e, are correlated with fluorescence observations the discharge. e were Stark broadening compared 3 calculated from measured conductivity. Additional as function pressure mixtures oxygen presented for pressures 10 Torr to 1 atm. flowing gases static systems presented. In addition, limitations these identified.