Publications by Dávid Wágner

High-resolution repeat topography of drifting ice floes in the Arctic Ocean from terrestrial laser scanning

Snow and ice topography impact and are impacted by fluxes of mass, energy, and momentum in Arctic sea ice. We measured the topography on approximately a 0.5 km2 drifting parcel of Arctic sea ice on 42 separate days from 18 October 2019 to 9 May 2020 via Te ...

2024

Temporospatial variability of snow's thermal conductivity on Arctic sea ice

Dávid Wágner

Snow significantly impacts the seasonal growth of Arctic sea ice due to its thermally insulating properties. Various measurements and parameterizations of thermal properties exist, but an assessment of the entire seasonal evolution of thermal conductivity ...

2023

Overview of physics studies on ASDEX Upgrade

Basil Duval, Timothy Goodman, Richard Pitts, Olivier Sauter, Stefano Coda, Alberto Bottino, Marco Wischmeier, Andrea Scarabosio, Hartmut Zohm, Laurie Porte, Yann Camenen, Thomas Binderup Jensen, Benoît Labit, Emiliano Fable, Alessandro Bortolon, Federico Alberto Alfredo Felici, Fang Liu, Dávid Wágner, Antoine Pierre Emmanuel Alexis Merle, Emanuele Poli, Nicola Vianello, Giovanni Tardini, Cristian Sommariva, Alessandro Pau, Otto Asunta, Haomin Sun, Xiao Wang, Gergely Papp, Bernhard Sieglin

The ASDEX Upgrade (AUG) programme, jointly run with the EUROfusion MST1 task force, continues to significantly enhance the physics base of ITER and DEMO. Here, the full tungsten wall is a key asset for extrapolating to future devices. The high overall heat ...

IOP Publishing Ltd2019

Evolution of nitrogen concentration and ammonia production in N-2-seeded H-mode discharges at ASDEX Upgrade

Basil Duval, Timothy Goodman, Richard Pitts, Olivier Sauter, Stefano Coda, Alberto Bottino, Marco Wischmeier, Andrea Scarabosio, Hartmut Zohm, Laurie Porte, Yann Camenen, Thomas Binderup Jensen, Emiliano Fable, Federico Alberto Alfredo Felici, Dávid Wágner, Doohyun Kim, Antoine Pierre Emmanuel Alexis Merle, Emanuele Poli, Nicola Vianello, Giovanni Tardini, Donghyun Kim, Cristian Sommariva, Otto Asunta, Haomin Sun, Xiao Wang, Gergely Papp, Bernhard Sieglin

Ammonia formation was studied in a series of dedicated nitrogen seeded H-mode discharges at ASDEX Upgrade. The evolution of ammonia formation was investigated with a reference phase before the seeding, and a long, stable flat-top nitrogen-seeded phase. It ...

IOP Publishing Ltd2019

ELM-induced cold pulse propagation in ASDEX Upgrade

Patrick Blanchard, Roland Behn, Basil Duval, Timothy Goodman, Yves Martin, Jean-Marc Moret, Richard Pitts, Olivier Sauter, Holger Reimerdes, Stefano Coda, Marco Wischmeier, Jan Horacek, Alexander Karpushov, Laurie Porte, Yanis Andrebe, Yann Camenen, Thomas Binderup Jensen, Duccio Testa, Benoît Labit, Emiliano Fable, Javier García Hernández, Ben McMillan, Marc Gruber, Christian Gabriel Theiler, Federico Alberto Alfredo Felici, Dávid Wágner, Attila Bencze, Doohyun Kim, Wouter Vijvers, Hoang Bao Le, Zhouji Huang, Himank Anand, Claudio Marini, Antoine Pierre Emmanuel Alexis Merle, Federico Nespoli, Heinz Mueller, Anna Teplukhina, Joan Decker, Cedric Kar-Wai Tsui, Pedro Andres Molina Cabrera, Matteo Fontana, , , , , , , , , , , ,

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

Patrick Blanchard, Roland Behn, Basil Duval, Ambrogio Fasoli, Timothy Goodman, Yves Martin, Jean-Marc Moret, Richard Pitts, Olivier Sauter, Henri Weisen, Holger Reimerdes, Stefano Coda, Alberto Bottino, Marco Wischmeier, Jan Horacek, Andrea Scarabosio, Hartmut Zohm, Alexander Karpushov, Laurie Porte, Yanis Andrebe, Yann Camenen, Jonathan Graves, Thomas Binderup Jensen, Benoît Labit, Emiliano Fable, Mikhail Maslov, Javier García Hernández, David Pfefferlé, Ben McMillan, Marc Gruber, Christian Gabriel Theiler, Federico Alberto Alfredo Felici, Miguel Filipe Silva Füglister, Dávid Wágner, Attila Bencze, Doohyun Kim, Wouter Vijvers, Hoang Bao Le, Zhouji Huang, Himank Anand, Claudio Marini, , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , ,

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

Patrick Blanchard, Roland Behn, Basil Duval, Timothy Goodman, Pierre Jacquot, Bruno Marchand, Yves Martin, Pascal Morel, Jean-Marc Moret, Richard Pitts, Olivier Sauter, Holger Reimerdes, Stefano Coda, Alberto Bottino, Marco Wischmeier, Jan Horacek, Andrea Scarabosio, Hartmut Zohm, Alexander Karpushov, Laurie Porte, Yanis Andrebe, Yann Camenen, Thomas Binderup Jensen, Duccio Testa, Telmo David Ribeiro Da Costa, Benoît Labit, Emiliano Fable, Patrycja Nowak-Sliwinska, Javier García Hernández, Ben McMillan, Marc Gruber, Christian Gabriel Theiler, Federico Alberto Alfredo Felici, Jose Felix Vega Stavro, Lenke Horváth, Dávid Wágner, Attila Bencze, Thomas Riedl, Lorenzo Anton-Louis Talà, Diego Carnevale, , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , ,

Overview of ASDEX Upgrade results

Basil Duval, Timothy Goodman, Olivier Sauter, Stefano Coda, Alberto Bottino, Marco Wischmeier, Andrea Scarabosio, Hartmut Zohm, Laurie Porte, Yann Camenen, Thomas Binderup Jensen, Emiliano Fable, Federico Alberto Alfredo Felici, Dávid Wágner, Doohyun Kim, Antoine Pierre Emmanuel Alexis Merle, Emanuele Poli, Nicola Vianello, Giovanni Tardini, Donghyun Kim, Cristian Sommariva, Otto Asunta, Haomin Sun, Xiao Wang, Gergely Papp, Bernhard Sieglin

The ASDEX Upgrade (AUG) programme is directed towards physics input to critical elements of the ITER design and the preparation of ITER operation, as well as addressing physics issues for a future DEMO design. Since 2015, AUG is equipped with a new pair of ...

IOP Publishing Ltd2017

Overview of progress in European medium sized tokamaks towards an integrated plasma-edge/wall solution

Patrick Blanchard, Roland Behn, Basil Duval, Timothy Goodman, Yves Martin, Jean-Marc Moret, Richard Pitts, Olivier Sauter, Holger Reimerdes, Stefano Coda, Marco Wischmeier, Jan Horacek, Alexander Karpushov, Laurie Porte, Yanis Andrebe, Yann Camenen, Thomas Binderup Jensen, Duccio Testa, Benoît Labit, Emiliano Fable, Javier García Hernández, Ben McMillan, Marc Gruber, Christian Gabriel Theiler, Federico Alberto Alfredo Felici, Dávid Wágner, Attila Bencze, Doohyun Kim, Wouter Vijvers, Hoang Bao Le, Zhouji Huang, Himank Anand, Claudio Marini, Antoine Pierre Emmanuel Alexis Merle, Federico Nespoli, Heinz Mueller, Anna Teplukhina, Joan Decker, Cedric Kar-Wai Tsui, Umar Sheikh, Cristian Galperti, , , , , , , , ,

Status, Operation, and Extension of the ECRH System at ASDEX Upgrade

Timothy Goodman, Stefan Müller, Hartmut Zohm, Dávid Wágner

The upgraded electron cyclotron resonance heating (ECRH) system at ASDEX Upgrade (AUG) has been routinely used with eight gyrotrons during the last experimental campaign. A further upgrade will replace the existing system of four short-pulse (140 GHz, 2 s, ...

2016

Recent ASDEX Upgrade research in support of ITER and DEMO

Basil Duval, Timothy Goodman, Olivier Sauter, Stefano Coda, Alberto Bottino, Marco Wischmeier, Andrea Scarabosio, Hartmut Zohm, Laurie Porte, Yann Camenen, Thomas Binderup Jensen, Emiliano Fable, Federico Alberto Alfredo Felici, Dávid Wágner, Doohyun Kim, Heinz Mueller, Emanuele Poli, Nicola Vianello, Giovanni Tardini, Donghyun Kim, Alessandro Pau, Otto Asunta, Haomin Sun, Xiao Wang, Gergely Papp, Bernhard Sieglin

Recent experiments on the ASDEX Upgrade tokamak aim at improving the physics base for ITER and DEMO to aid the machine design and prepare efficient operation. Type I edge localized mode (ELM) mitigation using resonant magnetic perturbations (RMPs) has been ...

Iop Publishing Ltd2015

Overview of the FTU results

Basil Duval, Olivier Sauter, Holger Reimerdes, Jonathan Rossel, Alexander Karpushov, Duccio Testa, Lucia Isabel Federspiel, Dávid Wágner, Gabriele Grosso, Doohyun Kim, Cristian Galperti, Donghyun Kim

Since the 2012 IAEA-FEC Conference, FTU operations have been largely devoted to runaway electrons generation and control, to the exploitation of the 140 GHz electron cyclotron (EC) system and to liquid metal limiter elements. Experiments on runaway electro ...

Iop Publishing Ltd2015

Effects of central electron cyclotron power on plasma rotation and on triggerless onset of NTMs in the TCV tokamak

Basil Duval, Olivier Sauter, Holger Reimerdes, Jonathan Rossel, Alexander Karpushov, Duccio Testa, Lucia Isabel Federspiel, Dávid Wágner, Doohyun Kim, Donghyun Kim

Experiments on the TCV tokamak show that high power central electron cyclotron heating (ECH) and current drive (ECCD) produce significant direct modification of the plasma rotation profile, as well as the effect on the equilibrium current density. These ef ...

IOP Publishing Ltd2015

Analysis of Lithium Driven Electron Density Peaking in FTU Liquid Lithium Limiter Experiments

Yann Camenen, Dávid Wágner

The impact of lithium impurities on the microstability and turbulent transport characteristics in the core of a typical FTU liquid lithium limiter (LLL) (Mazzitelli et al 2011 Nucl. Fusion 51 073006) discharge during the density ramp-up phase is studied. A ...

Int Atomic Energy Agency2013

Electron and Impurity Transport Studies in the TCV Tokamak

Dávid Wágner, David Nicholas Wagner

EPFL2013

Understanding the core density profile in TCV H-mode plasmas

Olivier Sauter, Henri Weisen, Emiliano Fable, Andreas Pitzschke, Dávid Wágner

Results from a database analysis of H-mode electron density profiles on the Tokamak à Configuration Variable (TCV) under stationary conditions show that the logarithmic electron density gradient increases with collisionality. By contrast, usual observation ...

IOP2012

Recent TCV results – innovative plasma shaping to improve plasma properties and insight

Stephan Brunner, Basil Duval, Timothy Goodman, Jean-Marc Moret, Antoine Pochelon, Olivier Sauter, Laurent Villard, Holger Reimerdes, Stefano Coda, Alberto Bottino, Sébastien Jolliet, Jonathan Rossel, Alexander Karpushov, Laurie Porte, Paolo Angelino, Benoît Labit, Alessandro Marinoni, Mikael Rancic, Andreas Pitzschke, Dávid Wágner, David Nicholas Wagner

2012