Publications de Jean-Daniel Landis

Gas puff imaging on the TCV tokamak

Basil Duval, Jean-Daniel Landis, Yanis Andrebe, Robert Bertizzolo, Christian Gabriel Theiler, Curdin Tobias Wüthrich, Cristian Galperti, Olivier Claude Martin Février, Nicola Offeddu

We present the design and operation of a suite of Gas Puff Imaging (GPI) diagnostic systems installed on the Tokamak a Configuration Variable (TCV) for the study of turbulence in the plasma edge and Scrape-Off-Layer (SOL). These systems provide the unique ...

AIP Publishing2022

Nearing final design of the ITER EC H&CD Upper Launcher

René Chavan, Timothy Goodman, Olivier Sauter, Jean-Daniel Landis, Robert Bertizzolo, Emanuele Poli, Florian Ramseyer, Matteo Vagnoni

The ITER ECRH system consists of 24 gyrotrons with up to 24 MW installed millimeter wave heating power at 170 GHz, power supplies, control system, transmission lines, one Equatorial and the four Upper Launchers. With its high frequency and small beam focus ...

ELSEVIER SCIENCE SA2019

Design status of the double Closure Plate Sub-Plate concept for the ITER Electron Cyclotron Upper Launcher

René Chavan, Timothy Goodman, Jean-Daniel Landis, Avelino Mas Sanchez, Florian Ramseyer, Matteo Vagnoni

The Closure Plate Sub-Plate (CPSP), which defines the border between ex-vessel and in-vessel components of the Electron Cyclotron Upper Launcher (EC UL), bundles the waveguides into a sub-assembly which can be manipulated separately from the UL Port Plug ( ...

2018

Status Status of the final design of the EC UPP launcher

René Chavan, Jean-Daniel Landis

Four EC H&CD (Electron Cyclotron Heating and Current Drive) launchers will be installed into the upper ports #12, #13, #15 and #16 in ITER. Beside plasma heating their main purpose is to counteract plasma instabilities by injecting up to 20 MW of microwave ...

ELSEVIER SCIENCE SA2018

Thermal mechanical analyses of the mm-wave miter bend for the ITER electron cyclotron upper launcher first confinement system

René Chavan, Timothy Goodman, Jean-Daniel Landis, Avelino Mas Sanchez, Florian Ramseyer, Matteo Vagnoni

Each of the 4 ITER Electron Cyclotron Heating Upper Launcher (ECHUL) features 8 transmission lines used to inject microwave power of up to 1.31 MW (at the source) per line, into the plasma at 170 GHz. The microwaves are guided from the gyrotrons via (empty ...

ELSEVIER SCIENCE SA2018

Mechanical analyses of the ITER electron cyclotron upper launcher first confinement system

René Chavan, Timothy Goodman, Jean-Daniel Landis, Avelino Mas Sanchez

2017

Characterization of metallic seals to be used in the waveguide flange coupling of the ITER electron cyclotron upper launcher first confinement system

René Chavan, Timothy Goodman, Jean-Daniel Landis, Robert Bertizzolo

2017

Thermal analyses of the mm-waveguide cooling concepts for the ITER electron cyclotron upper launcher first confinement system

René Chavan, Timothy Goodman, Jean-Daniel Landis, Robert Bertizzolo, Avelino Mas Sanchez

2017

Mechanical analyses of the waveguide flange coupling for the first confinement system of the ITER electron cyclotron upper launcher

René Chavan, Timothy Goodman, Jean-Daniel Landis, Robert Bertizzolo

The four electron cyclotron (EC) upper port antennas (or "upper launchers" -UL) will be used to drive current locally inside magnetic islands located at the q= 2 (or smaller) rational surfaces in order to stabilize neoclassical tearing modes (NTMs), as wel ...

Elsevier Science Sa2016

Tunable radiator for small satellite application

Frédéric Bongard, Mikaël Krummen, Jean-Daniel Landis, Nevena Saponjic, Tomislav Debogovic, Pedro Robustillo Bayon

A tunable radiator for space application has been developed to meet stringent requirements in terms of electrical and environmental specifications but also low mass, simple manufacturing and low cost. The element is based on the folded PIFA antenna, with s ...

2016

Progress of the ECRH Upper Launcher design for ITER

René Chavan, Timothy Goodman, Olivier Sauter, Jean-Daniel Landis, Francisco Sanchez, Emanuele Poli

The design of the ITER ECRH system provides 20 MW millimeter wave power for central plasma heating and MHD stabilization. The system consists of an array of 24 gyrotrons with power supplies coupled to a set of transmission lines guiding the beams to the fo ...

Elsevier Science Sa2014

Preliminary design of the ITER ECH Upper Launcher

René Chavan, Timothy Goodman, Olivier Sauter, Jean-Daniel Landis, Hartmut Zohm, Francisco Sanchez, Emanuele Poli

The design of the ITER electron cyclotron launchers recently reached the preliminary design level - the last major milestone before design finalization. The ITER ECH system contains 24 installed gyrotrons providing a maximum ECH injected power of 20 MW thr ...

Elsevier Science Sa2013

The ITER EC H&CD Upper Launcher: Maintenance concepts

René Chavan, Jean-Daniel Landis

Maintenance of the ITER EC H&CD Upper Launcher (UL) shall be performed through the use of Remote Handling (RH) in the ITER Hot Cell Facility (HCF). The UL design will have to be fully compliant with ITER RH maintenance requirements and the set of RH toolin ...

Elsevier Science Sa2013

The ITER EC H&CD upper launcher: Structural design

René Chavan, Timothy Goodman, Jean-Daniel Landis

Four ITER EC H&CD (Electron Cyclotron Heating and Current Drive) Upper Launchers will be installed in the ITER Tokamak to counteract plasma instabilities by injection of up to 20 MW of millimeter-wave power at 170 GHz. Each Launcher features a structural s ...

Elsevier2011

Overview of the ITER EC H&CD system and its capabilities

Stefano Alberti, René Chavan, Timothy Goodman, Olivier Sauter, Minh Quang Tran, Jean-Philippe Hogge, Jean-Daniel Landis, Hartmut Zohm, Laurie Porte, Robert Bertizzolo, Francisco Sanchez, Ioannis Pagonakis, Emanuele Poli

The Electron Cyclotron (EC) system for the ITER tokamak is designed to inject >= 20 MW RF power into the plasma for Heating and Current Drive (H&CD) applications. The EC system consists of up to 26 gyrotrons (between 1 and 2 MW each), the associated power ...

Elsevier2011

Progress on the ITER H&D EC Upper Launcher Steering-Mirror Control System

René Chavan, Timothy Goodman, Jean-Daniel Landis, Robert Bertizzolo, Francisco Sanchez, Frédéric Dolizy, Federico Alberto Alfredo Felici

The ITER Heating and Current Drive Upper Launcher (H&CD EC UL) uses a pneumomechanical steering-mirror assembly (SMA) to steer the RF beams for their deposition in the appropriate location in the plasma to control magnetohydrodynamic activity (neoclassical ...

Institute of Electrical and Electronics Engineers2010

Design status of the ITER ECRH upper launcher mm-wave system

René Chavan, Jean-Daniel Landis, Robert Bertizzolo, Francisco Sanchez, Frédéric Dolizy, Federico Alberto Alfredo Felici

The purpose of the ITER electron cyclotron resonance heating (ECRH) upper launcher (UL), or antennae will be to provide localised current drive by accurately directing mm-wave beams up to 2MW, out of the four allocated upper port plugs, at chosen rational ...

Elsevier2009

Progress on the ITER ECRH upper launcher steering mirror identification and control

René Chavan, Jean-Daniel Landis, Robert Bertizzolo, Francisco Sanchez, Frédéric Dolizy, Federico Alberto Alfredo Felici

The main objective of the ITER ECRH upper launcher (UL) is to control magnetohydrodynamic activity, in particular neoclassical tearing modes (NTMs), by driving several MW of EC Current near the q = 1, 3/2, 2 flux surfaces, where NTMs are expected to occur. ...

Elsevier2009

Progress on the ITER Electron Cyclotron Heating and Current Drive Upper Launcher Steering Mirror Control System

René Chavan, Timothy Goodman, Jean-Daniel Landis, Robert Bertizzolo, Francisco Sanchez, Frédéric Dolizy, Federico Alberto Alfredo Felici

The ITER ECRH upper launcher (UL) uses a steering mechanism assembly (SMA) to steer the beams in the appropriate location for controlling magnetohydrodynamic (MILD) activity in the plasma (NTMs and sawtooth oscillations). ...

IEEE2009

Progress on the design and manufacturing of the mirrors for the ITER Electron Cyclotron Heating and Current Drive upper launcher

René Chavan, Jean-Daniel Landis, Robert Bertizzolo, Francisco Sanchez

Four of the 16 ITER upper port plugs will be devoted to electron cyclotron resonance heating (ECRH) in order to control the magneto-hydrodynamic (MHD) instabilities. ...

IEEE2009