Elements of H-mode pedestal structure

RJ Groebner, S Saarelma - Plasma Physics and Controlled …, 2023 - iopscience.iop.org
This paper reviews current understanding of key physics elements that control the H-mode
pedestal structure, which exists at the boundary of magnetically confined plasmas. The …

[HTML][HTML] Reduced models for ETG transport in the tokamak pedestal

DR Hatch, C Michoski, D Kuang… - Physics of …, 2022 - pubs.aip.org
This paper reports on the development of reduced models for electron temperature gradient
(ETG) driven transport in the pedestal. Model development is enabled by a set of 61 …

[HTML][HTML] A survey of pedestal magnetic fluctuations using gyrokinetics and a global reduced model for microtearing stability

MT Curie, JL Larakers, DR Hatch, AO Nelson… - Physics of …, 2022 - pubs.aip.org
This article presents a global reduced model for slab-like microtearing modes (MTMs) in the
H-mode pedestal, which reproduces distinctive features of experimentally observed …

On electromagnetic turbulence and transport in STEP

M Giacomin, D Kennedy, FJ Casson… - Plasma Physics and …, 2024 - iopscience.iop.org
In this work, we present first-of-their-kind nonlinear local gyrokinetic (GK) simulations of
electromagnetic turbulence at mid-radius in the burning plasma phase of the conceptual …

[HTML][HTML] ETG turbulence in a tokamak pedestal

J Walker, DR Hatch - Physics of Plasmas, 2023 - pubs.aip.org
This paper explores the fundamental characteristics of electron-temperature-gradient (ETG)-
driven turbulence in the tokamak pedestal. The extreme gradients in the pedestal produce …

Gyrokinetic analysis of inter-edge localized mode transport mechanisms in a DIII-D pedestal

MR Halfmoon, DR Hatch, MT Kotschenreuther… - Physics of …, 2022 - pubs.aip.org
In this study, gyrokinetic simulations are used to study pedestal fluctuations for DIII-D
discharge 174082 using the GENE code. Nonlinear local simulations indicate that electron …

ETG turbulent transport in the Mega Ampere Spherical Tokamak (MAST) pedestal

PY Li, DR Hatch, B Chapman-Oplopoiou… - Nuclear …, 2023 - iopscience.iop.org
The results of a gyrokinetic analysis of turbulent transport driven by the electron temperature
gradient (ETG) in the MAST pedestal are presented. Local nonlinear simulations from the …

Modeling electron temperature profiles in the pedestal with simple formulas for ETG transport

DR Hatch, MT Kotschenreuther, PY Li… - Nuclear …, 2024 - iopscience.iop.org
This paper reports on the refinement (building on (Hatch DR et al 2022 Phys. Plasmas29
062501)) and application of simple formulas for electron heat transport from electron …

Micro-tearing mode dominated electron heat transport in DIII-D H-mode pedestal

J Chen, X Jian, DL Brower, SR Haskey, Z Yan… - Nuclear …, 2023 - iopscience.iop.org
A new, comprehensive set of evidence reveals that Micro-Tearing Modes (MTMs) dominate
pedestal electron heat transport in an H-mode experiment in the DIII-D tokamak. The …

Complex structure of turbulence across the ASDEX Upgrade pedestal

LA Leppin, T Görler, M Cavedon, MG Dunne… - Journal of Plasma …, 2023 - cambridge.org
The theoretical investigation of relevant turbulent transport mechanisms in H-mode
pedestals is a great scientific and numerical challenge. In this study, we address this …