Publications related to Preliminary Confinement Studies during ECRH in TCV

Shaping effects on scrape-off layer plasma turbulence: A rigorous validation of three-dimensional simulations against TCV measurements

Paolo Ricci, Fabio Riva, Cedric Kar-Wai Tsui

The effect of plasma shaping on scrape-off layer (SOL) plasma turbulence is investigated through a rigorous validation exercise. Two- and three-dimensional simulations of the SOL plasma dynamics in three TCV limited discharges are carried out with the GBS ...

2020

H-mode grade confinement in L-mode edge plasmas at negative triangularity on DIII-D

Olivier Sauter, Alessandro Marinoni

Plasmas with a negative triangularity shape have been created on the DIII-D tokamak that, despite maintaining standard L-mode edge radial profiles, reach volume averaged pressure levels typical of H-mode scenarios. Within the auxiliary power available for ...

2019

Effects of collisionality and T e /T i on fluctuations in positive and negative δ tokamak plasmas

Olivier Sauter, Ambrogio Fasoli, Stefano Coda, Stephan Brunner, Laurie Porte, Gabriele Merlo, Matteo Fontana, Ajay Chandrarajan Jayalekshmi

The effects of negative triangularity () on confinement and fluctuations in plasmas covering a large range of parameters were investigated on the tokamak à configuration variable (TCV). The conditions explored in this paper include discharges where neutral ...

2019

Turbulent transport in TCV plasmas with positive and negative triangularity

Stefano Coda, Laurie Porte, Gabriele Merlo, Matteo Fontana

Local gyrokinetic simulations with the GENE code are used to investigate the turbulent transport for different levels of neutral beam injection heating power in the Tokamak a Configuration Variable (TCV) for plasmas with both positive and negative edge tri ...

2019

Realistic multi-machine tokamak profile simulations and numerical ramp-down optimization using the RAPTOR code

Anna Teplukhina

Predictive modelling of plasma profiles is an essential part of ongoing research in tokamak plasmas, required for a successful realization of future fusion reactors. This thesis focuses on upgrading the RAPTOR code to extend the area of its applicability f ...

EPFL2018

The effect of triangularity on fluctuations in a tokamak plasma

Olivier Sauter, Stefano Coda, Laurie Porte

The effects of plasma shaping, in particular triangularity (d), on temperature fluctuations in the tokamak a configuration variable have been studied using the correlation electron cyclotron emission system. It has been found that, in ohmic discharges with ...

2018

Dependence of the L-Mode scrape-off layer power fall-off length on the upper triangularity in TCV

Stefano Coda, Holger Reimerdes, Benoît Labit, Christian Gabriel Theiler, Antoine Pierre Emmanuel Alexis Merle, Roberto Maurizio, Bernhard Sieglin

This paper reports on experimental observations on TCV with a scan in upper triangularity

{\delta }_{\mathrm{up}}

, including negative triangularity, focusing on the power fall-off length

{\lambda }_{{\rm{q}}}

in L-Mode. The upper triangularity is scann ...

2018

Experimental study of plasma turbulence in the TCV tokamak

Zhouji Huang

This thesis presents an experimental investigation of electron density fluctuations in the TCV tokamak, primarily with the tangential phase contrast imaging (TPCI) diagnostic. The focus is to study the small-scale broadband turbulence in the plasma, which ...

EPFL2017

Pedestal properties of H-modes with negative triangularity using the EPED-CH model

Olivier Sauter, Antoine Pierre Emmanuel Alexis Merle

The EPED model has been designed to predict the pedestal height and width from a minimal set of parameters and using the stability of the pedestal region for global MHD peeling-ballooning (P-B) modes as well as local kinetic ballooning modes (KBMs). This a ...

IOPscience2017

Geometric formulas for system codes including the effect of negative triangularity

Olivier Sauter

Formulas for the volume, poloidal and toroidal surfaces, poloidal length, plasma current, and hence average poloidal field, are determined using global parameters of tokamak plasmas. Previous formulas did not include systematically the effect of triangular ...

Elsevier2016

Preliminary Confinement Studies during ECRH in TCV

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Shaping effects on scrape-off layer plasma turbulence: A rigorous validation of three-dimensional simulations against TCV measurements

H-mode grade confinement in L-mode edge plasmas at negative triangularity on DIII-D

Effects of collisionality and T e /T i on fluctuations in positive and negative δ tokamak plasmas

Turbulent transport in TCV plasmas with positive and negative triangularity

Realistic multi-machine tokamak profile simulations and numerical ramp-down optimization using the RAPTOR code

The effect of triangularity on fluctuations in a tokamak plasma

Dependence of the L-Mode scrape-off layer power fall-off length on the upper triangularity in TCV

Experimental study of plasma turbulence in the TCV tokamak

Pedestal properties of H-modes with negative triangularity using the EPED-CH model

Geometric formulas for system codes including the effect of negative triangularity

Realistic multi-machine tokamak profile simulations and numerical ramp-down optimization using the RAPTOR code

Pedestal properties of H-modes with negative triangularity using the EPED-CH model

The effect of triangularity on fluctuations in a tokamak plasma

Turbulent transport in TCV plasmas with positive and negative triangularity

Experimental study of plasma turbulence in the TCV tokamak

Shaping effects on scrape-off layer plasma turbulence: A rigorous validation of three-dimensional simulations against TCV measurements

Effects of collisionality and T e /T i on fluctuations in positive and negative δ tokamak plasmas

H-mode grade confinement in L-mode edge plasmas at negative triangularity on DIII-D

Dependence of the L-Mode scrape-off layer power fall-off length on the upper triangularity in TCV

Geometric formulas for system codes including the effect of negative triangularity