Publications de Blaise Marlétaz

Overview of the TCV digital real-time plasma control system and its applications

Basil Duval, Blaise Marlétaz, Olivier Sauter, Stefano Coda, Alexander Karpushov, Federico Alberto Alfredo Felici, Antoine Pierre Emmanuel Alexis Merle, Joan Decker, Marcelo Baquero Ruiz, Mengdi Kong, Francesco Carpanese, Federico Pesamosca, Anna Ngoc Minh Trang Vu, Alessandro Pau, Gino Marceca, Stefano Marchioni, Artur Perek

Real-time plasma control systems are at the heart of operation of modern tokamaks. The control system of the TCV tokamak has recently seen a major upgrade in terms of its hardware and software components. Control algorithms are entirely programmed and test ...

ELSEVIER SCIENCE SA2024

Upgrade of the neutral beam heating system on the TCV tokamak - second high energy neutral beam

Basil Duval, Damien Fasel, Ambrogio Fasoli, Pierre Lavanchy, Blaise Marlétaz, Yves Martin, Holger Reimerdes, Stefano Coda, Ugo Siravo, Alexander Karpushov, Jérémie Dubray, Frédéric Dolizy, Rémy Jacquier, Matthieu Toussaint, Umar Sheikh, Marcelo Baquero Ruiz, Filippo Bagnato, Lorenzo Martinelli, Matteo Vallar, Claudia Colandrea, Dmytry Mykytchuk, Jesús Poley Sanjuán

The TCV tokamak continues to leverage its unique shaping capabilities, flexible heating systems and modern control system to provide a stepladder approach for extrapolations of experimental results from different ma-chines to ITER and DEMO. TCV's configura ...

ELSEVIER SCIENCE SA2022

Megawatt power generation of the dual-frequency gyrotron for TCV at 84 and 126 GHz, in long pulses

Stefano Alberti, Damien Fasel, Timothy Goodman, Blaise Marlétaz, Minh Quang Tran, Jean-Philippe Hogge, Ugo Siravo, Christian Moura, Jérémie Dubray, Ioannis Pagonakis, Jonathan Sylvain Masur, Matthieu Toussaint, Jérémy Genoud, Konstantinos Avramidis

In the frame of the TCV Tokamak upgrade, two 84/126 GHz/2 s dual frequency gyrotrons designed by SPC and KIT and manufactured by THALES will be added to the existing EC-System. The first unit has been delivered to EPFL-SPC and tested. In the commissioning ...

2020

New capabilities of the incoherent Thomson scattering diagnostics in the TCV tokamak: divertor and real-time measurements

Patrick Blanchard, Basil Duval, Pierre-François Isoz, Pierre Lavanchy, Xavier Llobet, Blaise Marlétaz, Philippe Marmillod, Yanis Andrebe, Severino Antonioni, Federico Alberto Alfredo Felici, Steve Couturier, Joan Decker, Cristian Galperti

This work reports developments of the incoherent TS diagnostic capabilities in the Tokamak a Configuration Variable (TCV). Their goals are to (i) diagnose the TCV divertor region, and (ii) provide Te and ne profiles of the plasma bulk in real-time. These t ...

IOP PUBLISHING LTD2019

From W7-X Towards ITER and Beyond: 2019 Status on EU Fusion Gyrotron Developments

Stefano Alberti, Damien Fasel, Blaise Marlétaz, Jean-Philippe Hogge, Jérémie Dubray, Ioannis Pagonakis, Jérémy Genoud, Konstantinos Avramidis

In Europe, the research and development with main focus on achieving robust industrial designs of series gyrotrons for electron cyclotron heating and current drive of today's nuclear fusion experiments and towards a future DEMOnstration fusion power plant ...

IEEE2019

Manufacturing and Test of the 1 MW Long-Pulse 84/126 GHz Dual-Frequency Gyrotron for TCV

Stefano Alberti, Damien Fasel, Blaise Marlétaz, Jean-Philippe Hogge, Jérémie Dubray, Ioannis Pagonakis, Jérémy Genoud, Konstantinos Avramidis

An 1 MW long-pulse (2s), 84/126 GHz dual frequency gyrotron has been produced by THALES MSI, France responding to the needs for upgrading the ECH system of the TCV tokamak The initial tests of the prototype carried out at EPFL, Switzerland, have verified a ...

IEEE2019

High-efficiency, long-pulse operation of MW-level dual-frequency gyrotron, 84/126GHz, for the TCV Tokamak

Stefano Alberti, Damien Fasel, Timothy Goodman, Pierre-François Isoz, Pierre Lavanchy, Blaise Marlétaz, Jean-Philippe Hogge, Ugo Siravo, Jérémie Dubray, Jonathan Sylvain Masur, Miguel Filipe Silva Füglister, Matthieu Toussaint, Jérémy Genoud

The first unit of the dual-frequency gyrotron, 84-126GHz/lMW/2s, for the upgrade of the TCV ECH system has been delivered and is presently being commissioned. During a first phase, long-pulse operation (TRF>0.5s) has been achieved and powers in excess of 0 ...

IEEE2019

Thomson scattering measurements in the divertor region of the TCV Tokamak plasmas

Patrick Blanchard, Basil Duval, Pierre-François Isoz, Pierre Lavanchy, Xavier Llobet, Blaise Marlétaz, Ivo Furno, Yanis Andrebe, Severino Antonioni, Jonathan Sylvain Masur, Steve Couturier, Joan Decker, Riccardo Agnello

In order to better study conventional and alternative divertor configurations, the TCV Tokamak was recently upgraded. In-vessel graphite baffles were installed in the TCV chamber to delimit a separate divertor chamber from the core that required enhanced d ...

2019

LTCC magnetic sensors at EPFL and TCV: Lessons learnt for ITER

Thomas Maeder, Pierre Lavanchy, Jonathan Bryan Lister, Xavier Llobet, Blaise Marlétaz, Philippe Marmillod, Matthias Garcin, Ugo Siravo, Caroline Jacq, Christian Moura, Duccio Testa, Frédéric Dolizy, Severino Antonioni, Matthieu Toussaint, Steve Couturier, Adrien Aymeric Thibault Corne, Aylwin Iantchenko, Lorenzo Stipani

Innovative 3D high-frequency magnetic sensors have been designed and manufactured in-house for installation on the Tokamak a Configuration Variable (TCV), and are currently routinely operational. These sensors combine the Low Temperature Co-fired Ceramic ( ...

2019

Langmuir probe electronics upgrade on the tokamak a configuration variable

René Chavan, Pierre Lavanchy, Blaise Marlétaz, Philippe Marmillod, Richard Pitts, Benoît Labit, Christian Gabriel Theiler, Hugo De Oliveira

A detailed description of the Langmuir probe electronics upgrade for TCV (Tokamak a Configuration Variable) is presented. The number of amplifiers and corresponding electronics has been increased from 48 to 120 in order to simultaneously connect all of the ...

2019

Neutral beam heating on the TCV tokamak

René Chavan, Basil Duval, Damien Fasel, Ambrogio Fasoli, Pierre Lavanchy, Xavier Llobet, Blaise Marlétaz, Philippe Marmillod, Yves Martin, Albert Perez, Olivier Sauter, Stefano Coda, Ugo Siravo, Alexander Karpushov, Frédéric Dolizy, Matthieu Toussaint, Antoine Pierre Emmanuel Alexis Merle

2017

Commissioning of the heating neutral beam injector on the TCV tokamak

Damien Fasel, Blaise Marlétaz, Philippe Marmillod, Albert Perez, Ugo Siravo, Alexander Karpushov, Yanis Andrebe, Jérémie Dubray

2017

Upgrade of a 30 kV/10 mA anode power supply for triode type gyrotron

Stefano Alberti, Damien Fasel, Blaise Marlétaz, Philippe Marmillod, Albert Perez, Jean-Philippe Hogge, Ugo Siravo, Jérémie Dubray

The RF power of a gyrotron with a triode type magnetron-injection-gun (MIG) can be directly controlled via the voltage applied between its anode and its cathode. Hence, the performance of this type of gyrotron relies directly on the possibilities offered b ...

Elsevier Science Sa2015

First experimental results from the European Union 2 MW coaxial cavity ITER gyrotron prototype

Stefano Alberti, Damien Fasel, Timothy Goodman, Pierre Lavanchy, Blaise Marlétaz, Philippe Marmillod, Albert Perez, Minh Quang Tran, Jean-Philippe Hogge, Ugo Siravo, Laurie Porte, Emmanuel Droz, Ioannis Pagonakis

The European Union is working toward providing 2-MW, coaxial-cavity, continuous-wave (cw) 170-GHz gyrotrons for ITER. Their design is based on results,from an experimental preprototype tube having a pulse length of several milliseconds, in operation at For ...

American Nuclear Society2009

Status of development of the 2MW, 170GHz coaxial-cavity gyrotron for ITER

Stefano Alberti, Damien Fasel, Blaise Marlétaz, Philippe Marmillod, Albert Perez, Minh Quang Tran, Jean-Philippe Hogge, Ugo Siravo, Laurie Porte, Emmanuel Droz, Ioannis Pagonakis

2008

Ten Years of Experience in Integrated Control of the Multi-Megawatt

Stefano Alberti, Basil Duval, Damien Fasel, Timothy Goodman, Pierre-François Isoz, Pierre Lavanchy, Jonathan Bryan Lister, Blaise Marlétaz, Philippe Marmillod, Jean-Marc Moret, Jean-Philippe Hogge, Stefano Coda

2007

Installation and commissionning of the EU test facility for ITER gyrotron

Stefano Alberti, Damien Fasel, Timothy Goodman, Xavier Llobet, Blaise Marlétaz, Philippe Marmillod, Albert Perez, Minh Quang Tran, Jean-Philippe Hogge, Ugo Siravo, Laurie Porte, Emmanuel Droz

2006

Third Harmonic X-mode ECHTop-launch In the TCV Tokamak

Gilles Arnoux, Stefano Alberti, Blaise Marlétaz, Philippe Marmillod, Yves Martin, Laurie Porte

2005

Safety factor profile requirements for electron ITB formation in TCV

Gilles Arnoux, Stefano Alberti, Kurt Appert, Roland Behn, René Chavan, Basil Duval, Damien Fasel, Ambrogio Fasoli, Timothy Goodman, Pierre-François Isoz, Pierre Lavanchy, Jonathan Bryan Lister, Xavier Llobet, Jean-Claude Magnin, Blaise Marlétaz, Philippe Marmillod, Yves Martin, Jean-Marc Moret, Albert Perez, Richard Pitts, Antoine Pochelon, Olivier Sauter, Markus Siegrist, Gilbert Tonetti, Minh Quang Tran, Henri Weisen, Jean-Philippe Hogge, Stefano Coda, Christian Schlatter, Andrei Martynov, Petri Nikkola, Alberto Bottino, Karin Schombourg, Alexey Zabolotskiy, Ugo Siravo, Marco Wischmeier, Jonathan Rossel, Pierre Etienne, Igor Klimanov, Jan Horacek, Andrea Scarabosio, Alexander Karpushov, , , , , , , , , , , ,

Third-harmonic, top-launch, ECRH experiments on TCV tokamak

Gilles Arnoux, Stefano Alberti, Blaise Marlétaz, Philippe Marmillod, Yves Martin, Jean-Philippe Hogge, Laurie Porte

In the moderate magnetic field of TCV (1.5 T), the recently installed X3 system (3 gyrotrons, 118 GHz, 0.45 MW each, 2 s) broadens the operational space with the possibility of heating plasmas at high density, well above the cutoff density of the X2 system ...

IOP Publishing Ltd2005