Publications de Pierre Lavanchy

First Microsecond Velocity-space Resolved Simultaneous Measurements of Co- and Counter-current Fast-ion Losses in Forward and Reverse Magnetic Field in a Tokamak

Basil Duval, Ambrogio Fasoli, Pierre Lavanchy, Alexander Karpushov, Yanis Andrebe, Matthieu Toussaint, Matteo Vallar, Jesús Poley Sanjuán

A novel Fast Ion Loss Detector was designed, manufactured, installed and commissioned at the Tokamak & aacute; Configuration Variable. This is the first Fast Ion Loss Detector to feature four collimators that enable simultaneous detection of co- and counte ...

IOP Publishing Ltd2025

Design and upgrades of the TCV fast ion loss detector

Basil Duval, Ambrogio Fasoli, Pierre Lavanchy, Alexander Karpushov, Yanis Andrebe, Augustin Charles Roger Philippe Clément, Matteo Vallar, Jesús Poley Sanjuán

The Tokamak à Configuration Variable has a unique Fast Ion Loss Detector (FILD) that allows the simultaneous measurement of co- and counter-current fast-ion losses in forward or reverse magnetic field. Recently, multiple novel upgrades have been implemente ...

AIP Publishing2025

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

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

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

V-band Doppler backscattering diagnostic in the TCV tokamak

Pierre Lavanchy, Stefano Coda, Laurie Porte, Matthieu Toussaint, Pedro Andres Molina Cabrera, Nicola Offeddu

A variable configuration V-band heterodyne Doppler back-scattering diagnostic has been recently made operational in the tokamak a configuration variable. This article describes the hardware setup options, flexible quasi-optical launcher antenna, data-analy ...

AMER INST PHYSICS2018

Improving spatial and spectral resolution of TCV Thomson scattering

Patrick Blanchard, René Chavan, Basil Duval, Pierre Lavanchy, Xavier Llobet, Philippe Marmillod, Yanis Andrebe, Robert Bertizzolo, Matthieu Toussaint, Joan Decker

The recently completed MST2 upgrade to the Thomson scattering (TS) system on TCV (Tokamak a Configuration Variable) at the Swiss Plasma Center aims to provide an enhanced spatial and spectral resolution while maintaining the high level of diagnostic flexib ...

Iop Publishing Ltd2017

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

The JET Alfven Eigenmode Local Manager for the real-time detection and tracking of a frequency-degenerate spectrum of MHD instabilities

Patrick Blanchard, Ambrogio Fasoli, Pierre Lavanchy, Duccio Testa, Theodoros Panis

We present the real-time VME system used to detect and track MHD instabilities, and particularly Alfven Eigenmodes, on the JET tokamak [J.Wesson, Tokamaks, 3rd ed., Oxford Science Publication, Oxford, 2003, p.617]. This system runs on a 1 kHz clock cycle, ...

Elsevier2011

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

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, , , , , , , , , , , ,

Pierre Lavanchy

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First Microsecond Velocity-space Resolved Simultaneous Measurements of Co- and Counter-current Fast-ion Losses in Forward and Reverse Magnetic Field in a Tokamak

Design and upgrades of the TCV fast ion loss detector

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

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

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

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

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

Langmuir probe electronics upgrade on the tokamak a configuration variable

V-band Doppler backscattering diagnostic in the TCV tokamak

Improving spatial and spectral resolution of TCV Thomson scattering

Neutral beam heating on the TCV tokamak

The JET Alfven Eigenmode Local Manager for the real-time detection and tracking of a frequency-degenerate spectrum of MHD instabilities

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

First Measurement of the Damping Rate of High-n Toroidal Alfvén Eigenmodes in JET Tokamak Plasmas

First Measurement of the Damping Rate of High-n Toroidal Alfvén Eigenmodes in JET Tokamak Plasmas

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

Safety factor profile requirements for electron ITB formation in TCV