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Hartmut Zohm

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Recent ASDEX Upgrade research in support of ITER and DEMO

Olivier Sauter, Basil Duval, Stefano Coda, Timothy Goodman, Alessandro Pau, Federico Alberto Alfredo Felici, Laurie Porte, Haomin Sun, Yann Camenen, Marco Wischmeier

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

Technological and physics assessments on heating and current drive systems for DEMO

Minh Quang Tran, Laurie Porte, Hartmut Zohm, Emanuele Poli, Giovanni Tardini

The physics requirements of the heating and current (H&CD) systems in a Demonstration Fusion Power Plant (DEMO) are often beyond the actual level of design maturity and technology readiness required. The recent EU fusion roadmap advocates a pragmatic appro ...

Elsevier Science Sa2015

On recent results in the modelling of neoclassical-tearing-mode stabilization via electron cyclotron current drive and their impact on the design of the upper EC launcher for ITER

Olivier Sauter, Timothy Goodman, Hartmut Zohm, Emanuele Poli

Electron cyclotron wave beams injected from a launcher placed in the upper part of the vessel will be used in ITER to control MHD instabilities, in particular neoclassical tearing modes (NTMs). Simplified NTM stabilization criteria have been used in the pa ...

IOP Publishing Ltd2015

Advances in the physics basis for the European DEMO design

Ambrogio Fasoli, Javier García Hernández, Marco Wischmeier, Emiliano Fable, Bernhard Sieglin, Hartmut Zohm, Emanuele Poli

In the European fusion roadmap, ITER is followed by a demonstration fusion power reactor (DEMO), for which a conceptual design is under development. This paper reports the first results of a coherent effort to develop the relevant physics knowledge for tha ...

IOP Publishing Ltd2015

Electron-cyclotron-current-drive efficiency in DEMO plasmas

Laurie Porte, Emiliano Fable, Hartmut Zohm, Emanuele Poli, Giovanni Tardini

The achievable efficiency for external current drive through electron-cyclotron waves in a demonstration tokamak reactor is investigated. Two possible reactor designs, one for steady state and one for pulsed operation, are considered. Beam propagation, abs ...

Int Atomic Energy Agency2013

Preliminary design of the ITER ECH Upper Launcher

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

Non-linear magnetic perturbations during edge-localized modes in TCV dominated by low n mode components

Olivier Sauter, Holger Reimerdes, Hartmut Zohm

Edge-localized modes (ELMs) are instabilities in the edge of tokamak plasmas in the high confinement regime (H-mode). Despite beneficial aspects of ELMs, in a future device the size of the energy loss per ELM must be controlled, in order to avoid intolerab ...

IOP Publishing Ltd2013

Interpretation of the effects of electron cyclotron power absorption in pre-disruptive tokamak discharges in ASDEX Upgrade

Olivier Sauter, Daniele Brunetti, Hartmut Zohm

Tokamak disruptions are events of fatal collapse of the magnetohydrodynamic (MHD) confinement configuration, which cause a rapid loss of the plasma thermal energy and the impulsive release of magnetic energy and heat on the tokamak first wall components. T ...

Amer Inst Physics2012

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

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

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

On the heating mix of ITER

Olivier Sauter, Minh Quang Tran, Costanza Zucca, Hartmut Zohm, Frank Rüdiger Wagner

This paper considers the heating mix of ITER for the two main scenarios. Presently, 73MWof absorbed power are foreseen in the mix 20/33/20 for ECH, NBI and ICH. Given a sufficient edge stability, Q = 10 the goal of scenario 2 can be reached with 40MW power ...

IOP2010

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Technological and physics assessments on heating and current drive systems for DEMO

Minh Quang Tran, Laurie Porte, Hartmut Zohm, Emanuele Poli, Giovanni Tardini

Elsevier Science Sa2015

Electron-cyclotron-current-drive efficiency in DEMO plasmas

Laurie Porte, Emiliano Fable, Hartmut Zohm, Emanuele Poli, Giovanni Tardini

Int Atomic Energy Agency2013

On recent results in the modelling of neoclassical-tearing-mode stabilization via electron cyclotron current drive and their impact on the design of the upper EC launcher for ITER

Olivier Sauter, Timothy Goodman, Hartmut Zohm, Emanuele Poli

IOP Publishing Ltd2015

Advances in the physics basis for the European DEMO design

Ambrogio Fasoli, Javier García Hernández, Marco Wischmeier, Emiliano Fable, Bernhard Sieglin, Hartmut Zohm, Emanuele Poli

IOP Publishing Ltd2015

Interpretation of the effects of electron cyclotron power absorption in pre-disruptive tokamak discharges in ASDEX Upgrade

Olivier Sauter, Daniele Brunetti, Hartmut Zohm

Amer Inst Physics2012