81 citations · 153 across the 12 of their papers we have counts for
12 papers
Single Gaussian Process Method for Arbitrary Tokamak Regimes with a Statistical Analysis
Jarrod Leddy, Sandeep Madireddy, Eric Howell +1
Gaussian Process Regression (GPR) is a Bayesian method for inferring profiles based on input data. The technique is increasing in popularity in the fusion community due to its many…
The deteriorating effect of plasma density fluctuations on microwave beam quality
Alf Köhn, Max E. Austin, Michael W. Brookman +13
Turbulent plasma edge density fluctuations can broaden a traversing microwave beam degrading its quality. This can be a problem for scenarios relying on a high spatial localization…
Generation of synthetic magnetized plasma turbulence by representation as a stochastic process
Jarrod Leddy, Chris Bowman, Kieran Gibson +1
Plasma turbulence simulations are often computationally expensive with delicate numerical stability. Yet, long simulations are needed to generate uncorrelated turbulence data for s…
Resolving ECRH deposition broadening due to edge turbulence in DIII-D by heat deposition measurement
Michael W Brookman, Matthew B Thomas, Jarrod Leddy +7
Interaction between microwave power, used for local heating and mode control, and density fluctuations can produce a broadening of the injected beam, as confirmed in experiment and…
Resolving ECRH deposition broadening due to edge turbulence in DIII-D by 3D full-wave simulations
Matthew B Thomas, Michael W Brookman, Max E Austin +5
Edge plasma density fluctuations are shown to have a significant effect on the electron cyclotron resonance heating (ECRH) beam in the DIII-D tokamak. Experimental measurements of…
Intrinsic suppression of turbulence in linear plasma devices
Jarrod Leddy, Ben Dudson
Plasma turbulence is the dominant transport mechanism for heat and particles in magnetized plasmas in linear devices and tokamaks, so the study of turbulence is important in limiti…
Perturbing microwave beams by plasma density fluctuations
Alf Köhn, Eberhard Holzhauer, Jarrod Leddy +2
The propagation of microwaves across a turbulent plasma density layer is investigated with full-wave simulations. To properly represent a fusion edge-plasma, drift-wave turbulence…
Overview of recent physics results from MAST
A Kirk, J Adamek, RJ Akers +160
New results from MAST are presented that focus on validating models in order to extrapolate to future devices. Measurements during start-up experiments have shown how the bulk ion…
Hermes: Global plasma edge fluid turbulence simulations
Ben Dudson, Jarrod Leddy
The transport of heat and particles in the relatively collisional edge regions of magnetically confined plasmas is a scientifically challenging and technologically important proble…
Influence of plasma turbulence on microwave propagation
Alf Köhn, Eberhard Holzhauer, Jarrod Leddy +2
It is not fully understood how electromagnetic waves propagate through plasma density fluctuations when the size of the fluctuations is comparable with the wavelength of the incide…
A novel flexible field-aligned coordinate system for tokamak edge plasma simulation
Jarrod Leddy, Ben Dudson, Michele Romanelli +2
Tokamak plasmas are confined by a magnetic field that limits the particle and heat transport perpendicular to the field. Parallel to the field the ionised particles can move freely…
On the validity of drift-reduced fluid models for tokamak plasma simulation
Jarrod Leddy, Ben Dudson, Michele Romanelli
Drift-reduced plasma fluid models are commonly used in plasma physics for analytics and simulations; however, the validity of such models must be verified for the regions of parame…