A5073230220- Magnetic confinement fusion research
- Transportation Planning and Optimization
- Fusion materials and technologies
- Particle accelerators and beam dynamics
- Transportation and Mobility Innovations
- Urban Transport and Accessibility
- Traffic control and management
- Superconducting Materials and Applications
- Plasma Diagnostics and Applications
- Ionosphere and magnetosphere dynamics
- Maritime Ports and Logistics
- Laser-Plasma Interactions and Diagnostics
- Traffic Prediction and Management Techniques
- Urban and Freight Transport Logistics
- Data Management and Algorithms
- Maritime Transport Emissions and Efficiency
- Complex Network Analysis Techniques
- Evacuation and Crowd Dynamics
- Supply Chain Resilience and Risk Management
- Infrastructure Resilience and Vulnerability Analysis
- Traffic and Road Safety
- Vehicle Routing Optimization Methods
- Advanced Manufacturing and Logistics Optimization
- Nuclear reactor physics and engineering
- Risk and Safety Analysis
The University of Sydney
2015-2024
University of Technology Sydney
2023
Emerald Group Publishing (United Kingdom)
2022
New Jersey City University
2017
Princeton Plasma Physics Laboratory
2007-2016
Imperial College London
2005-2014
Transport for London
2004-2014
University of Minnesota
2011
Princeton University
1999-2010
University of London
2008
While the results of early work on density limit in tokamaks from ORMAK and DITE groups have been useful over years, recent experiments requirements for extrapolation to future prompted a new look at this subject. There are many physical processes which attainable densities tokamak plasmas. These include: (1) radiation low Z impurities, convection, charge exchange other losses plasma edge; (2) or high impurities core; (3) deterioration particle confinement (4) inadequate fuelling, often...
A new tokamak confinement regime has been observed on the Tokamak Fusion Test Reactor (TFTR) where particle and ion thermal diffusivities drop precipitously by a factor of \ensuremath{\sim}40 to neoclassical level for particles much less than value ions in region with reversed shear. This enhanced shear mode allows central electron density rise from 0.45 \ifmmode\times\else\texttimes\fi{} ${10}^{20}$ ${\mathrm{m}}^{\ensuremath{-}3}$ \ensuremath{\sim}1.2 ${T}_{i}\ensuremath{\sim}24$ keV...
Strong magnetohydrodynamic activity has been observed in PDX neutral-beam-heated discharges. It occurs for ${\ensuremath{\beta}}_{T}q>~0.045$ and is associated with a significant loss of fast ions drop neutron emission. As much as 20%-40% the beam heating power may be lost. The instability repetitive bursts oscillations \ensuremath{\le} 1 msec duration at 1-6-msec intervals. dubbed "fishbone instability" from its characteristic signature on Mirnov coils.
Deuterium neutral beams with energies up to 110 keV were injected into TFTR (Tokamak Fusion Test Reactor) plasmas at low magnetic field such that the beam injection velocities comparable Alfv\'en velocity. Excitation of toroidal eigenmodes was observed by Mirnov coils and emission spectroscopy.
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 ${10}^{16}$...
Abstract The spherical tokamak (ST) is a leading candidate for Fusion Nuclear Science Facility (FNSF) due to its compact size and modular configuration. National Spherical Torus eXperiment (NSTX) MA-class ST facility in the US actively developing physics basis an ST-based FNSF. In plasma transport research, experiments exhibit strong (nearly inverse) scaling of normalized confinement with collisionality, if this trend holds at low high fusion neutron fluences could be achievable very...
Dissipation of plasma toroidal angular momentum is observed in the National Spherical Torus Experiment due to applied nonaxisymmetric magnetic fields and their plasma-induced increase by resonant field amplification resistive wall mode destabilization. The measured decrease profile compared calculations nonresonant drag torque based on theory neoclassical viscosity. Quantitative agreement between experiment found when effect toroidally trapped particles included.
Turbulent fluctuations in plasmas with reversed magnetic shear have been investigated on the Tokamak Fusion Test Reactor. Under intense auxiliary heating, these are observed to bifurcate into two states different transport properties. In state better confinement, it has found that level of is very small throughout most region negative shear. By contrast, lower confinement characterized by large bursts which suggest a competition between driving and suppression turbulence. These results...
Neutral-beam--heated plasmas in TFTR show evidence of substantial non-Ohmically driven toroidal current, even for balanced beam momentum input. The observations are inconsistent with calculations including only Ohmic and beam-driven currents, presently can be matched by models the neoclassical bootstrap current.
The reliability of road networks depends directly on their vulnerability to disruptive incidents, ranging in severity from minor disruptions terrorist attacks. This paper presents a game theoretic approach the analysis network vulnerability. posits predefined disruption, attack or failure scenarios and then considers how use so as minimize maximum expected loss event one these coming fruition. A mixed route strategy is adopted, meaning that determined by worst scenario probabilities....