42 citations · 224 across the 17 of their papers we have counts for
18 papers
A Shortcut to Statistically Steady-State Turbulence with Flow Matching
Gianluca Galletti, Gerald Gutenbrunner, William Hornsby +5
Many nonlinear physical systems exhibit an initial transient phase in which perturbations grow before nonlinear interactions lead to a statistically steady state. While this satura…
Physics-Informed Neural Compression of High-Dimensional Plasma Data
Gianluca Galletti, Gerald Gutenbrunner, Sandeep S. Cranganore +6
High-fidelity scientific simulations are now producing unprecedented amounts of data, creating a storage and analysis bottleneck. A single simulation can generate tremendous data v…
GyroSwin: 5D Surrogates for Gyrokinetic Plasma Turbulence Simulations
Fabian Paischer, Gianluca Galletti, William Hornsby +5
Nuclear fusion plays a pivotal role in the quest for reliable and sustainable energy production. A major roadblock to viable fusion power is understanding plasma turbulence, which…
A Performance Analysis of Task Scheduling for UQ Workflows on HPC Systems
Chung Ming Loi, Anne Reinarz, Mikkel Lykkegaard +3
Uncertainty Quantification (UQ) workloads are becoming increasingly common in science and engineering. They involve the submission of thousands or even millions of similar tasks wi…
5D Neural Surrogates for Nonlinear Gyrokinetic Simulations of Plasma Turbulence
Gianluca Galletti, Fabian Paischer, Paul Setinek +5
Nuclear fusion plays a pivotal role in the quest for reliable and sustainable energy production. A major roadblock to achieving commercially viable fusion power is understanding pl…
Gaussian process surrogate models for the properties of micro-tearing modes in spherical tokamaks
William Hornsby, Ander Gray, James Buchanan +9
Spherical tokamaks (STs) have many desirable features that make them a suitable choice for fusion power plants. To understand their confinement properties, accurate calculation of…
Gaussian Process Regression models for the properties of micro-tearing modes in spherical tokamak
William Hornsby, Ander Gray, James Buchanan +9
Spherical tokamaks (STs) have many desirable features that make them an attractive choice for a future fusion power plant. Power plant viability is intrinsically related to plasma…
ReMKiT1D -- A framework for building reactive multi-fluid models of the tokamak Scrape-Off Layer with coupled electron kinetics in 1D
Stefan Mijin, Dominic Power, Ryan Holden +3
In this manuscript we present the recently developed flexible framework for building both fluid and electron kinetic models of the tokamak Scrape-Off Layer in 1D - ReMKiT1D (Reacti…
Electromagnetic gyrokinetic instabilities in STEP
Daniel Kennedy, Maurizio Giacomin, Francis J Casson +4
We present herein the results of a linear gyrokinetic analysis of electromagnetic microinstabilites in the conceptual high-, reactor-scale, tight-aspect-ratio tokamak STEP (Sphe…
Global gyrokinetic simulations of intrinsic rotation in ASDEX Upgrade Ohmic L-mode plasmas
W. A. Hornsby, C. Angioni, Z. X. Lu +6
Non-linear, radially global, turbulence simulations of ASDEX Upgrade (AUG) plasmas are performed and the nonlinear generated intrinsic flow shows agreement with the intrinsic flow…
On seed island generation and the non-linear self-consistent interaction of the tearing mode with electromagnetic gyro-kinetic turbulence
William Hornsby, Pierluigi Migliano, Rico Buchholz +4
The multi-scale interaction of self-consistently driven magnetic islands with electromagnetic turbulence is studied within the three dimensional, toroidal gyro-kinetic framework. I…
On the radial propagation of turbulence in gyro-kinetic toroidal systems
P. Migliano, R. Buchholz, S. R. Grosshauser +2
In this paper a conservation equation is derived for the radially dependent entropy in toroidal geometry using the local approximation of the gyro-kinetic framework. This equation…
The linear tearing instability in three dimensional, toroidal gyrokinetic simulations
William Hornsby, Pierluigi Migliano, Rico Bucholz +5
Linear gyro-kinetic simulations of the classical tearing mode in three-dimensional toroidal geometry were performed using the global gyro kinetic turbulence code, GKW . The results…
Nonlinear seed island generation by three-dimensional electromagnetic, gyrokinetic turbulence
William Hornsby, Pierluigi Migliano, Rico Buchholz +4
Turbulence is shown to be critical to the onset and evolution of the neoclassical tearing mode, affecting both its growth and rotation. The interaction is here studied for the firs…
Analysis of Lithium Driven Electron Density Peaking in FTU Liquid Lithium Limiter Experiments
G. Szepesi, M. Romanelli, F. Militello +7
The impact of lithium impurities on the microstability and turbulent transport characteristics in the core of a typical FTU Liquid Lithium Limiter (LLL)(Mazzitelli et al., Nucl. Fu…
Toroidal momentum transport in a tokamak caused by symmetry breaking parallel derivatives
Tobias Sung, Rico Buchholz, Francis Casson +5
A new mechanism for toroidal momentum transport in a tokamak is investigated using the gyro-kinetic model. First, an analytic model is developed through the use of the ballooning t…
Ion temperature gradient instability at sub-Larmor radius scales with non-zero ballooning angle
Pierluigi Migliano, Yann Camenen, Francis Casson +2
Linear gyro-kinetic stability calculations predict unstable toroidal Ion Temperature Gradient modes with normalised poloidal wave vectors well above one () for standard…
On the dynamics of vortex modes within magnetic islands
William Hornsby, Arthur Peeters, Mattia Siccinio +1
Recent work investigating the interaction of magnetic islands with micro-turbulence has uncovered the striking observation of large scale vortex modes forming within the island str…