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Kevin Henricus Annemarie Verhaegh

Cette personne a quitté l’EPFL

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Publications associées (39)

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Measurement of the 2D emission profiles of hydrogen and impurity ions in the TCV divertor

Basil Duval, Holger Reimerdes, Christian Gabriel Theiler, Kevin Henricus Annemarie Verhaegh, Mirko Wensing, Artur Perek

Plasma emission of hydrogen and impurities is measured with use of filtered camera imaging in TCV divertor. The measurement technique is discussed in detail including: selection choice of filters, the absolute calibration procedure and the tomographic inve ...

Elsevier2021

SOLPS-ITER simulations of the TCV divertor upgrade

Basil Duval, Holger Reimerdes, Christian Gabriel Theiler, Artur Perek, Marco Wischmeier, Davide Galassi, Kevin Henricus Annemarie Verhaegh, Mirko Wensing

The effect of the upcoming TCV divertor upgrade on the distribution of neutrals and the onset of detachment is studied using 2D transport code simulations. The divertor upgrade is centered around the installation of a gas baffle to form a divertor chamber ...

2019

Conduction-based model of the Scrape-Off Layer power sharing between inner and outer divertor in diverted low-density tokamak plasmas

Basil Duval, Marco Wischmeier, Benoît Labit, Nicola Vianello, Holger Reimerdes, Christian Gabriel Theiler, Umar Sheikh, Cedric Kar-Wai Tsui, Kevin Henricus Annemarie Verhaegh, Wouter Vijvers, Roberto Maurizio, Hugo De Oliveira, Mirko Wensing

A simple analytic model for the repartition of the Scrape-Off Layer (SOL) exhaust power between the inner and outer divertors in a diverted low-density tokamak plasma is introduced. Electron heat conduction is assumed to dominate the heat transport, from t ...

Elsevier2019

Stark broadening of Balmer lines with low and moderate quantum number in dense divertor plasmas

Basil Duval, Kevin Henricus Annemarie Verhaegh

A computer simulation technique is applied to the modelling of Balmer line shapes in dense divertor conditions. The spectral profile of lines with a high principal quantum number n is sensitive to Stark broadening and can be used as a density diagnostic. I ...

2018

Separating the roles of magnetic topology and neutral trapping in modifying the detachment threshold for TCV

Christian Gabriel Theiler, Kevin Henricus Annemarie Verhaegh, Mirko Wensing

Total flux expansion, a divertor magnetic topology design choice embodied in the Super-X divertor, is predicted through simple analytic models and SOLPS calculations to reduce the plasma and impurity density detachment thresholds as the outer divertor sepa ...

IOP PUBLISHING LTD2020

Development of a real-time algorithm for detection of the divertor detachment radiation front using multi-spectral imaging

Christian Gabriel Theiler, Kevin Henricus Annemarie Verhaegh, Wouter Vijvers, Artur Perek

In this paper we present a novel algorithm to extract the optical plasma boundary and radiation front for detached divertor plasmas. We show that reliable detection of the divertor leg and radiation front is possible using lightweight image processing tool ...

IOP Publishing Ltd2020

A locked mode indicator for disruption prediction on JET and ASDEX upgrade

Jérémie Gérard Laurent, Olivier Sauter, Ambrogio Fasoli, Henri Weisen, Richard Pitts, Jonathan Graves, Stefano Coda, Basil Duval, Timothy Goodman, Yves Martin, Yann Camenen, Jan Horacek, Javier García Hernández, Marco Wischmeier, Jean-Marc Moret, Mikhail Maslov, Patrick Blanchard, Alessandro Pau, David Pfefferlé, Davide Galassi, Federico Alberto Alfredo Felici, Roland Behn, Antonio José Pereira de Figueiredo, Jonathan Marc Philippe Faustin, Liang Yao, Dalziel Joseph Wilson, Cristian Sommariva, Benoît Labit, Hamish William Patten, Samuel Lanthaler, Holger Reimerdes, Laurie Porte, Christian Gabriel Theiler, Alberto Bottino, Marc Gruber, Alexander Karpushov, Emiliano Fable, Ben McMillan, Andrea Scarabosio, Federico Nespoli, Kevin Henricus Annemarie Verhaegh, Antoine Pierre Emmanuel Alexis Merle, Umar Sheikh, Wouter Vijvers, Matteo Fontana, Yanis Andrebe, Cristian Galperti, Haomin Sun, Joan Decker, Cedric Kar-Wai Tsui, Doohyun Kim, Nicola Vianello, Pedro Andres Molina Cabrera, Anna Teplukhina, Thomas Binderup Jensen, Zhouji Huang, Jose Vicente Sanchez Mut, Attila Bencze, Dávid Wágner, Claudio Marini, Himank Anand, Dahye Choi, Hoang Bao Le, Miguel Filipe Silva Füglister, Anton Malygin, Mélanie Preynas, Mateusz Gospodarczyk

The aim of this paper is to present a signal processing algorithm that, applied to the raw Locked Mode signal, allows us to obtain a disruption indicator in principle exploitable on different tokamaks. A common definition of such an indicator for different ...

2019

Progress toward divertor detachment on TCV within H-mode operating parameters

Basil Duval, Holger Reimerdes, Benoît Labit, Christian Gabriel Theiler, Alexander Karpushov, Antoine Pierre Emmanuel Alexis Merle, Umar Sheikh, Artur Perek, Cedric Kar-Wai Tsui, Kevin Henricus Annemarie Verhaegh, Wouter Vijvers, Roberto Maurizio, Curdin Tobias Wüthrich

Recent experiments on Tokamak à Configuration Variable have made significant progress toward partial detachment of the outer divertor in neutral beam heated H-mode plasmas in conventional and alternative divertor configurations. The heating power required ...

2019

Modification of SOL profiles and fluctuations with line-average density and divertor flux expansion in TCV

Holger Reimerdes, Benoît Labit, Christian Gabriel Theiler, Nicola Vianello, Cedric Kar-Wai Tsui, Kevin Henricus Annemarie Verhaegh, Wouter Vijvers

A set of Ohmic density ramp experiments addressing the role of parallel connection length in modifying scrape off layer (SOL) properties has been performed on the TCV tokamak. The parallel connection length has been modified by varying the poloidal flux ex ...

IOP Publishing Ltd2017

Experimental Studies of the Snowflake Divertor in TCV

Basil Duval, Holger Reimerdes, Benoît Labit, Christian Gabriel Theiler, Umar Sheikh, Federico Nespoli, Cedric Kar-Wai Tsui, Kevin Henricus Annemarie Verhaegh, Wouter Vijvers

To address the risk that, in a fusion reactor, the conventional single-null divertor (SND) configuration may not be able to handle the power exhaust, alternative divertor configurations, such as the Snowflake divertor (SFD), are investigated in TCV. The ex ...

Elsevier Science Bv2017

ELM-induced cold pulse propagation in ASDEX Upgrade

Olivier Sauter, Richard Pitts, Stefano Coda, Basil Duval, Timothy Goodman, Yves Martin, Yann Camenen, Jan Horacek, Javier García Hernández, Duccio Testa, Marco Wischmeier, Jean-Marc Moret, Patrick Blanchard, Alessandro Pau, Federico Alberto Alfredo Felici, Roland Behn, Antonio José Pereira de Figueiredo, Cristian Sommariva, Benoît Labit, Holger Reimerdes, Laurie Porte, Christian Gabriel Theiler, Marc Gruber, Alexander Karpushov, Emiliano Fable, Ben McMillan, Federico Nespoli, Kevin Henricus Annemarie Verhaegh, Antoine Pierre Emmanuel Alexis Merle, Umar Sheikh, Matteo Fontana, Yanis Andrebe, Cristian Galperti, Joan Decker, Dávid Wágner, Cedric Kar-Wai Tsui, Doohyun Kim, Nicola Vianello, Pedro Andres Molina Cabrera, Anna Teplukhina, Thomas Binderup Jensen, Zhouji Huang, Attila Bencze, Claudio Marini, Wouter Vijvers, Himank Anand, Dahye Choi, Hoang Bao Le, Anton Malygin, Mélanie Preynas

In ASDEX Upgrade, the propagation of cold pulses induced by type-I edge localized modes (ELMs) is studied using electron cyclotron emission measurements, in a dataset of plasmas with moderate triangularity. It is found that the edge safety factor or the pl ...

2019

SOLPS-ITER validation with TCV L-mode discharges

Basil Duval, Patrick Blanchard, Holger Reimerdes, Christian Gabriel Theiler, Marco Wischmeier, Cedric Kar-Wai Tsui, Kevin Henricus Annemarie Verhaegh, Mirko Wensing, Marcelo Baquero Ruiz, Artur Perek, Hugo De Oliveira, Filippo Bagnato, Lorenzo Martinelli, Sophie Danielle Angelica Gorno, Claudia Colandrea

This work presents a quantitative test of SOLPS-ITER simulations against tokamak a configuration variable (TCV) L-mode experiments. These simulations account for drifts, currents, kinetic neutrals, and carbon impurities providing the most complete edge tra ...

2021

The role of plasma-molecule interactions on power and particle balance during detachment on the TCV tokamak

Basil Duval, Christian Gabriel Theiler, Kevin Henricus Annemarie Verhaegh, Mirko Wensing, Artur Perek

This paper shows experimental results from the TCV tokamak that indicate plasma-molecule interactions involving D2+

IOP Publishing Ltd2021

TCV experiments towards the development of a plasma exhaust solution

Basil Duval, Benoît Labit, Nicola Vianello, Christian Gabriel Theiler, Holger Reimerdes, Umar Sheikh, Cedric Kar-Wai Tsui, Kevin Henricus Annemarie Verhaegh, Wouter Vijvers, Roberto Maurizio

IOP Publishing Ltd2017

Identification of the primary processes that lead to the drop in divertor target ion current at detachment in TCV

Kevin Henricus Annemarie Verhaegh, Mirko Wensing

Using SOLPS-ITER, we model a TCV conventional divertor discharge density ramp to understand the role of various processes in the loss of target ion current. We find that recombination is not a strong contributor to the rollover of the target ion current at ...

2018

Overview of the TCV tokamak program: scientific progress and facility upgrades

Olivier Sauter, Ambrogio Fasoli, Basil Duval, Henri Weisen, Timothy Goodman, Jonathan Graves, Stefano Coda, Yves Martin, Jean-Marc Moret, Stefano Alberti, Ivo Furno, Duccio Testa, Minh Quang Tran, Paolo Ricci, Patrick Blanchard, Yann Camenen, Jan Horacek, Holger Reimerdes, Marco Wischmeier, Benoît Labit, Nicola Vianello, Jean-Philippe Hogge, Christian Gabriel Theiler, Federico Nespoli, Alessandro Pau, Federico Alberto Alfredo Felici, Laurie Porte, Alexander Karpushov, Antoine Pierre Emmanuel Alexis Merle, Joan Decker, Xavier Llobet, Fabio Riva, Umar Sheikh, Cristian Galperti, Cedric Kar-Wai Tsui, Christian Schlatter, Kevin Henricus Annemarie Verhaegh, Wouter Vijvers, Anna Teplukhina, Yanis Andrebe, Roberto Maurizio, Zhouji Huang, Rémy Jacquier, Claudio Marini, Mengdi Kong, Hoang Bao Le, Oulfa Chellaï, Himank Anand, Falk Hans Braunmüller, Francesco Carpanese, Josef Kamleitner, Pedro Andres Molina Cabrera, Joyeeta Sinha

IOP Publishing Ltd2017

Validation of the ICRF antenna coupling code RAPLICASOL against TOPICA and experiments

Telmo David Ribeiro Da Costa, Pedro Filipe Varela Saraiva, Olivier Sauter, Stefano Coda, Basil Duval, Timothy Goodman, Patrick Blanchard, Richard Pitts, Yves Martin, Javier García Hernández, Bruno Marchand, Duccio Testa, Jean-Marc Moret, Alessandro Pau, Federico Alberto Alfredo Felici, Roland Behn, Benoît Labit, Jan Horacek, Yann Camenen, Holger Reimerdes, Laurie Porte, Christian Gabriel Theiler, Marco Wischmeier, Marc Gruber, Alexander Karpushov, Antonio José Pereira de Figueiredo, Alberto Bottino, Emiliano Fable, Patrycja Nowak-Sliwinska, Doohyun Kim, Federico Nespoli, Antoine Pierre Emmanuel Alexis Merle, Andrea Scarabosio, Umar Sheikh, Wouter Vijvers, Matteo Fontana, Yanis Andrebe, Cristian Galperti, Haomin Sun, Joan Decker, Zhouji Huang, Ben McMillan, Cedric Kar-Wai Tsui, Diego Carnevale, Janir Nuno Ramos Antunes Da Cruz, Nicola Vianello, Cristian Sommariva, Pedro Andres Molina Cabrera, Anna Teplukhina, Hoang Bao Le, Kevin Henricus Annemarie Verhaegh, Jennifer Kaitlyn Olsen, Jose Vicente Sanchez Mut, Dávid Wágner, Jose Felix Vega Stavro, Lorenzo Anton-Louis Talà, Claudio Marini, Pamela Solange Valdés Undurraga, Wei Zhang, Lenke Horváth, Attila Bencze, Himank Anand, Dahye Choi, Andrea Salmi, Raffaele Tito D'Agnolo, Erwan Fabrice Koch, Hugo Antoine Georges Arnichand, Thomas Binderup Jensen, Allan Svejstrup Nielsen, Michael Oliver Reinke, Pierre Jacquot, Stefano Mattei, Daniel Molina Romero, Ana Susnjara, Anton Malygin, Mélanie Preynas, Thomas Riedl, Mateusz Gospodarczyk, Pascal Morel, Wen Bin Chng

In this paper we validate the finite element code RAPLICASOL, which models radiofrequency wave propagation in edge plasmas near ICRF antennas, against calculations with the TOPICA code. We compare the output of both codes for the ASDEX Upgrade 2-strap ante ...

IOP Publishing Ltd2019

Dynamics of detachment in TCV with N2 seeding and flux expansion

Basil Duval, Benoît Labit, Holger Reimerdes, Christian Gabriel Theiler, Cedric Kar-Wai Tsui, Roberto Maurizio, Kevin Henricus Annemarie Verhaegh

2018

Physics research on the TCV tokamak facility: from conventional to alternative scenarios and beyond

Léa Fadil, Olivier Sauter, Ambrogio Fasoli, Stefano Coda, Basil Duval, Henri Weisen, Timothy Goodman, Yves Martin, Stefano Alberti, Yann Camenen, Jan Horacek, Javier García Hernández, Duccio Testa, Marco Wischmeier, Jean-Marc Moret, Ivo Furno, Nicola Vianello, Federico Nespoli, Minh Quang Tran, Patrick Blanchard, Alessandro Pau, Davide Galassi, Benoît Labit, Paolo Ricci, Jean-Philippe Hogge, Jonathan Graves, Holger Reimerdes, Laurie Porte, Christian Gabriel Theiler, Federico Alberto Alfredo Felici, Alexander Karpushov, Antoine Pierre Emmanuel Alexis Merle, Cedric Kar-Wai Tsui, Christian Schlatter, Kevin Henricus Annemarie Verhaegh, Umar Sheikh, Wouter Vijvers, Xavier Llobet, Anna Teplukhina, Matteo Fontana, Yanis Andrebe, Cristian Galperti, Joan Decker, Zhouji Huang, Artur Perek, Marcelo Baquero Ruiz, Alberto Mariani, Matteo Vallar, Justin Richard Ball, Mengdi Kong, Hugo De Oliveira, Claudio Marini, Rémy Jacquier, Pedro Andres Molina Cabrera, Filippo Bagnato, Roberto Maurizio, Oulfa Chellaï, Himank Anand, Mirko Wensing, Francesco Carpanese, Aylwin Iantchenko, Dahye Choi, Federico Pesamosca, Hugo Antoine Georges Arnichand, Arsène Stéphane Tema Biwole, Lorenzo Stipani, Anna Ngoc Minh Trang Vu, Joyeeta Sinha, Nicola Offeddu, Joshua Nathaniel Hawke

IOP Publishing Ltd2019