Philipp Ulbl
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View article: Turbulence and transport in spectrally accelerated full-<i>f</i> gyrokinetic simulations
Turbulence and transport in spectrally accelerated full-<i>f</i> gyrokinetic simulations Open
We investigate edge and scrape-off layer (SOL) turbulence and transport using the spectrally accelerated full- f gyrokinetic (GK) code GENE-X , recently introduced in Frei et al (2025 Comput. Phys. Commun. 316 109817). Extending previous w…
View article: On the mechanism of Pedestal Relaxation Events -- Insights gained by turbulence simulations with GRILLIX
On the mechanism of Pedestal Relaxation Events -- Insights gained by turbulence simulations with GRILLIX Open
Pedestal Relaxation Events (PREs) appear in I-mode discharges close to the I-H transition. Although they show certain similarities with Edge Localised Modes (ELMs), i.e. periodic energy ejections, the underlying mechanism seems to be very …
View article: Simulations of edge and SOL turbulence in diverted negative and positive triangularity plasmas
Simulations of edge and SOL turbulence in diverted negative and positive triangularity plasmas Open
Optimizing the performance of magnetic confinement fusion devices is critical to achieving an attractive fusion reactor design. Negative triangularity (NT) scenarios have been shown to achieve excellent levels of energy confinement, while …
View article: Turbulence and Transport in Spectrally Accelerated full-f Gyrokinetic Simulations
Turbulence and Transport in Spectrally Accelerated full-f Gyrokinetic Simulations Open
We investigate edge and scrape-off layer (SOL) turbulence and transport using the spectrally accelerated full-f gyrokinetic (GK) code GENE-X, recently introduced in [B. J. Frei et al., arXiv:2411.09232 (2024)]. Extending previous work on t…
View article: Simulations of edge and SOL turbulence in diverted negative and positive triangularity plasmas
Simulations of edge and SOL turbulence in diverted negative and positive triangularity plasmas Open
Optimizing the performance of magnetic confinement fusion devices is critical to achieving an attractive fusion reactor design. Negative triangularity (NT) scenarios have been shown to achieve excellent levels of energy confinement, while …
View article: Spectrally Accelerated Edge and Scrape-Off Layer Gyrokinetic Turbulence Simulations
Spectrally Accelerated Edge and Scrape-Off Layer Gyrokinetic Turbulence Simulations Open
This paper presents the first gyrokinetic (GK) simulations of edge and scrape-off layer (SOL) turbulence accelerated by a velocity-space spectral approach in the full-f GK code GENE-X. Building upon the original grid velocity-space discret…
View article: Tokamak edge-SOL turbulence in H-mode conditions simulated with a global, electromagnetic, transcollisional drift-fluid model
Tokamak edge-SOL turbulence in H-mode conditions simulated with a global, electromagnetic, transcollisional drift-fluid model Open
The design of commercially feasible magnetic confinement fusion reactors strongly relies on the reduced turbulent transport in the plasma edge during operation in the high confinement mode (H-mode). We present first global turbulence simul…
View article: Tokamak edge-SOL turbulence in H-mode conditions simulated with a global, electromagnetic, transcollisional drift-fluid model
Tokamak edge-SOL turbulence in H-mode conditions simulated with a global, electromagnetic, transcollisional drift-fluid model Open
The design of commercially feasible magnetic confinement fusion reactors strongly relies on the reduced turbulent transport in the plasma edge during operation in the high confinement mode (H-mode). We present first global turbulence simul…
View article: Reduced model for H-mode sustainment in unfavorable <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:mi>∇</mml:mi> <mml:mtext>B</mml:mtext> </mml:mrow> </mml:math> drift configuration in ASDEX Upgrade
Reduced model for H-mode sustainment in unfavorable drift configuration in ASDEX Upgrade Open
A recently developed reduced model of H-mode sustainment based on interchange-drift-Alfvén turbulence description in the vicinity of the separatrix matching experimental observations in ASDEX Upgrade has been extended to experiments with t…
View article: Reduced model for H-mode sustainment in unfavorable $\mathbf{ \nabla B}$ drift configuration in ASDEX Upgrade
Reduced model for H-mode sustainment in unfavorable $\mathbf{ \nabla B}$ drift configuration in ASDEX Upgrade Open
A recently developed reduced model of H-mode sustainment based on interchange-drift-Alfvén turbulence description in the vicinity of the separatrix matching experimental observations in ASDEX Upgrade has been extended to experiments with t…
View article: Kinetic study of the bifurcation of resonant magnetic perturbations for edge localized mode suppression in ASDEX Upgrade
Kinetic study of the bifurcation of resonant magnetic perturbations for edge localized mode suppression in ASDEX Upgrade Open
The correlation between the bifurcation of resonant magnetic perturbations (RMPs) to the unshielded state and edge localized mode (ELM) suppression in ASDEX Upgrade is studied using a kinetic plasma response model numerically and analytica…
View article: TCV-X21-GENEX: influence of collisions on the validation of global gyrokinetic simulations
TCV-X21-GENEX: influence of collisions on the validation of global gyrokinetic simulations Open
This repository contains the data that supports the findings of the study that is published in P. Ulbl et al., Phys. Plasmas 30, 052507 (2023). Three global electromagnetic gyrokinetic simulations of the TCV-X21 case have been performed. A…
View article: TCV-X21-GENEX: influence of collisions on the validation of global gyrokinetic simulations
TCV-X21-GENEX: influence of collisions on the validation of global gyrokinetic simulations Open
This repository contains the data that supports the findings of the study that is published in P. Ulbl et al., Phys. Plasmas 30, 052507 (2023). Three global electromagnetic gyrokinetic simulations of the TCV-X21 case have been performed. A…
View article: Influence of collisions on the validation of global gyrokinetic simulations in the edge and scrape-off layer of TCV
Influence of collisions on the validation of global gyrokinetic simulations in the edge and scrape-off layer of TCV Open
Understanding and predicting turbulent transport in the edge and scrape-off-layer (SOL) of magnetic confinement fusion devices is crucial for developing feasible fusion power plants. In this work, we present the latest improvements to the …
View article: Filamentary transport in global edge-SOL simulations of ASDEX Upgrade
Filamentary transport in global edge-SOL simulations of ASDEX Upgrade Open
The understanding and the predictive capability for turbulence in the plasma edge and scrape-off layer (SOL) are crucial for the development of magnetic confinement fusion reactors. To this end, we characterise turbulent transport across t…
View article: Full-<i>f</i> electromagnetic gyrokinetic turbulence simulations of the edge and scrape-off layer of ASDEX Upgrade with GENE-X
Full-<i>f</i> electromagnetic gyrokinetic turbulence simulations of the edge and scrape-off layer of ASDEX Upgrade with GENE-X Open
Understanding and predicting turbulence in the edge and scrape-off layer (SOL) is critical for the optimization of magnetic confinement fusion devices. While there has been progress along these lines, especially with the help of fluid code…