The impact of edge radial electric fields on edge–scrape-off layer coupling in the TJ-II stellarator

G Grenfell, BP Van Milligen, U Losada, T Estrada… - Nuclear …, 2019 - iopscience.iop.org
In this letter, we investigate the impact of edge radial electric fields (E r) on turbulence
propagation and the coupling between the plasma edge and the scrape-off layer (SOL) …

New diagnostic tools for transport measurements in the scrape-off layer (SOL) of medium-size tokamaks

BS Schneider, C Ionita, S Costea… - Plasma Physics and …, 2019 - iopscience.iop.org
We present a new diagnostic tool for the determination of various plasma parameters in the
edge region of medium-size tokamaks (MST) and stellarators (specifically Wendelstein 7-X) …

The localization of low order rational surfaces based on the intermittence parameter in the TJ-II stellarator

BP Van Milligen, BA Carreras, L García… - Nuclear …, 2020 - iopscience.iop.org
This work intends to show that the multifractal concept of intermittence can be fruitfully
applied to the identification of the radial location of low order rational surfaces inside a …

Applicability of transfer entropy for the calculation of effective diffusivity in heat transport

JH Nicolau, L García, BA Carreras… - Physics of Plasmas, 2018 - pubs.aip.org
A method has been proposed to study heat transport in magnetically confinement plasmas,
based on the transfer entropy (TE). In this work, we study this method by introducing …

The impact of radial electric fields and plasma rotation on intermittence in TJ-II

BP van Milligen, BA Carreras, L García… - Plasma Physics and …, 2022 - iopscience.iop.org
This work explores the impact of an imposed radial electric field on the intermittence
parameter in magnetically confined plasmas. The intermittence is sensitive to both the …

Identification and characterization of topological structures of turbulence in magnetic confined plasmas

L García, BA Carreras - Plasma Physics and Controlled Fusion, 2020 - iopscience.iop.org
Transport in turbulent magnetic plasmas is closely related to the flow topological structures.
These are mainly filamentary vortices linked to the magnetic filed lines and zonal flows …

Anomalous Cross-Field Transport in Edge Plasma

S Krasheninnikov, A Smolyakov, A Kukushkin… - On the Edge of Magnetic …, 2020 - Springer
So-called “anomalous” plasma transport due to micro-and meso-scale fluctuations of
electromagnetic fields caused by different plasma instabilities is one of the backbones of …

TJ-II: Influence of magnetic configuration on filament dynamics

D Carralero, I Voldiner, G Grenfell, B van Milligen… - wiki.fusion.ciemat.es
SOL transport in tokamaks is generally thought to be dominated by the macroscopic
convective cells usually known as “filaments” or “blobs”. These filaments propagate …

[PDF][PDF] New diagnostic tools for transport measurements in the Scrape-Off Layer (SOL) of Medium-Size Tokamaks

C Ionita-Schrittwieser - scipub.euro-fusion.org
We present a new diagnostic tool for the determination of various plasma parameters in the
edge region of Medium-Size Tokamaks (MST) and stellarators (specifically Wendelstein 7-X) …

[PDF][PDF] Detection of filamentary structrures using transfer entropy in TJ-II and W7-X

JH Nicolau, L García, BA Carreras, BP van Milligen… - lac913.epfl.ch
Due to the geometry of the magnetic field in magnetically confined plasmas, there are
regions where the field lines are closed. In these regions, called rational surfaces, turbulent …