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Ioannis Pagonakis

Cette personne n’est plus à l’EPFL

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Publications associées (39)

Design considerations for future DEMO gyrotrons: A review on related gyrotron activities within EUROfusion

Stefano Alberti, Minh Quang Tran, Ioannis Pagonakis, Konstantinos Avramidis

2017

European research activities towards a future DEMO gyrotron

Stefano Alberti, Minh Quang Tran, Ioannis Pagonakis, Konstantinos Avramidis

2017

Progress on the upgrade of the TCV EC-system with two 1MW dual-frequency gyrotrons

Stefano Alberti, Timothy Goodman, Minh Quang Tran, Trach-Minh Tran, Jean-Philippe Hogge, Ioannis Pagonakis, Jérémy Genoud, Konstantinos Avramidis

The upgrade of the electron cyclotron (EC) system of the TCV tokamak has entered in its realization phase. The MW-class dual-frequency gyrotron design (84 or 126GHz/2s), based on the 140GHz W7-X gyrotron, is finalized and a contract for the manufacturing o ...

IEEE2016

Electron trapping mechanisms in magnetron injection guns

Jean-Philippe Hogge, Ioannis Pagonakis, Konstantinos Avramidis, Jiahuan Zhang

A key parameter for the gyrotron operation and efficiency is the presence of trapped electrons. Two electron trapping mechanisms can take place in gyrotrons: (i) the adiabatic trap and (ii) the magnetic potential well. Their influence on the gyrotron opera ...

American Institute of Physics (AIP)2016

Status and Experimental Results of the European 1 MW, 170 GHz Industrial CW Prototype Gyrotron for ITER

Stefano Alberti, Minh Quang Tran, Jean-Philippe Hogge, Christian Schlatter, Ioannis Pagonakis, Konstantinos Avramidis

In the frame of a collaborative effort between the European GYrotron Consortium (EGYC), the European domestic agency Fusion for Energy (F4E) and the Industrial partner Thales Electron Devices (TED), the first continuous wave (CW) prototype of the EU gyrotr ...

Ieee2016

Status of the development of the EU 170 GHz/1 MW/CW gyrotron

Stefano Alberti, Minh Quang Tran, Trach-Minh Tran, Jean-Philippe Hogge, Christian Schlatter, Ioannis Pagonakis, Konstantinos Avramidis

The progress in the development of the European 170 GHz, 1 MW/CW gyrotron for electron cyclotron heating & current drive (ECH&CD) on ITER is reported. A continuous wave (CW) prototype is being manufactured by Thales Electron Devices (TED), France, while a ...

Elsevier Science Sa2015

From Series Production of Gyrotrons for W7-X Toward EU-1 MW Gyrotrons for ITER

Stefano Alberti, Minh Quang Tran, Jean-Philippe Hogge, Ioannis Pagonakis, Konstantinos Avramidis

Europe is devoting significant joint efforts to develop and to manufacture MW-level gyrotrons for electron cyclotron heating and current drive of future plasma experiments. The two most important ones are the stellarator Wendelstein W7-X at Greifswald and ...

Ieee-Inst Electrical Electronics Engineers Inc2014

Development Of Advanced Gyrotrons In Europe

Stefano Alberti, Jean-Philippe Hogge, Ioannis Pagonakis, Konstantinos Avramidis

The German PMW project and the European EGYC consortium are driving gyrotron developments for the two major plasma fusion experiments in Europe using ECRH, Wendelstein W7-X at Greifswald and the international ITER at Cadarache. 1 MW CW, 140 GHz conventiona ...

Amer Nuclear Soc2013

Study of the ITER Stray Magnetic Field Effect on the EU 170-GHz2-MW Coaxial Cavity Gyrotron

Stefano Alberti, Jean-Philippe Hogge, Ioannis Pagonakis, Fengping Li

In this paper, the effect of the ITER stray magnetic field (SMF) on the operation of the European gyrotron has been studied. The SMFs include the magnetic field generated by neighboring gyrotrons, the ITER tokamak, and also the field perturbations caused b ...

Ieee-Inst Electrical Electronics Engineers Inc2012

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

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

A new concept for the collection of an electron beam configured by an externally applied axial magnetic field

Stefano Alberti, Jean-Philippe Hogge, Ioannis Pagonakis

2008

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

Parameterization Technique for the Preliminary Gun Design of the EU 170GHz 1MW Conventional Cavity gyrotron for ITER

Stefano Alberti, Jean-Philippe Hogge, Ioannis Pagonakis

2008

Numerical study of the effect of stray magnetic field on the beam quality of the 170 GHz, 2MW gyrotron gun for ITER

Stefano Alberti, Jean-Philippe Hogge, Ioannis Pagonakis

2007

The European 2MW, 170GHz Coaxial Cavity Gyrotron for ITER (Invited paper)

Stefano Alberti, Damien Fasel, Timothy Goodman, Albert Perez, Minh Quang Tran, Jean-Philippe Hogge, Laurie Porte, Ioannis Pagonakis

2007

A new concept for the collection of an electron beam guided by an externally applied magnetic field

Stefano Alberti, Jean-Philippe Hogge, Ioannis Pagonakis

2007

Critical Issues Associated with the ITER ECH System

Stefano Alberti, René Chavan, Damien Fasel, Olivier Sauter, Costanza Zucca, Ioannis Pagonakis

2007

Recent evolution of the simulation tools for computer aided design of electron-optical systems for powerful gyrotrons

Trach-Minh Tran, Jean-Philippe Hogge, Ioannis Pagonakis

Computer aided design of powerful gyrotrons for electron cyclotron resonance heating and current drive of fusion plasmas requires adequate physical models and efficient software packages for analysis, comparison and optimization of their electron-optical s ...

2007

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