Publications associées à Énergie de fusion nucléaire

CEA Broad Studies on EU DEMO CS and PF Magnet Systems

In the framework of EU design activities for dimensioning the future fusion DEMOnstration reactor (DEMO), extensive analyses were conducted in EUROfusion context, aiming at ultimately defining the design of the DEMO magnet system. In this objective CEA pro ...

IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC2020

Experimental verification of X-point potential well formation in unfavorable magnetic field direction

Basil Duval, Holger Reimerdes, Christian Gabriel Theiler, Joaquim Loizu Cisquella, Sophie Danielle Angelica Gorno, Claudia Colandrea, Marco Wischmeier, Cedric Kar-Wai Tsui, Mirko Wensing, Hugo De Oliveira

Recent TCV experiments confirm the predicted formation of an electric potential well, below the magnetic X-point, in configurations with unfavorable

B_t

field direction (ion

\nabla B

drift away from the divertor), that substantially reshapes the typica ...

2020

AC Loss Measurement of the DEMO TF React&Wind Conductor Prototype No. 2

Pierluigi Bruzzone, Kamil Sedlák, Boris Stepanov

The EUROfusion DEMO is being designed as the fusion machine to be built after ITER. During the preconceptual phase, several design options are investigated by theoretical analyses as well as tests on newly developed conductor prototypes. One design option ...

IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC2020

A new mechanism for filament disconnection at the X-point: poloidal shear in radial E × B velocity

Federico Nespoli, Davide Galassi

Plasma filaments generated by turbulence in the scrape-off layer are sometimes observed in experi- ments and simulations to disconnect from the target plate in the vicinity of the X-point, resulting in a “quiescent zone” with reduced fluctuations, possibly ...

2020

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

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

Modeling of the response function of CdTe detectors for a hard X-ray synthetic diagnostic

Stefano Coda, Joan Decker

The response function of CdTe detectors used in a hard X-ray spectrometer system (HXRS) on the TCV tokamak fusion experiment is modeled based on the measured energy spectra from multiple gamma-ray sources. The response function consists of an asymmetric Ga ...

2020

Ultra-compact spoof surface plasmon polariton waveguides and notch filters based on double-sided parallel-strip lines

In this paper, we propose a new variety of strong field confinement, ultra-compact size, easy-to-integrate spoof surface plasmon polariton (SSPP) waveguides based on double-sided parallel-strip lines (DSPSL), which are formed by etching opposite spiral gro ...

2020

Progress Toward Interpretable Machine Learning-Based Disruption Predictors Across Tokamaks

Olivier Sauter, Alessandro Pau

In this paper we lay the groundwork for a robust cross-device comparison of data-driven disruption prediction algorithms on DIII-D and JET tokamaks. In order to consistently carry on a comparative analysis, we define physics-based indicators of disruption ...

TAYLOR & FRANCIS INC2020

Ensemble Distillation for Robust Model Fusion in Federated Learning

Martin Jaggi, Sebastian Urban Stich, Tao Lin, Lingjing Kong

Federated Learning (FL) is a machine learning setting where many devices collaboratively train a machine learning model while keeping the training data decentralized. In most of the current training schemes the central model is refined by averaging the par ...

2020

Towards large area CVD diamond disks for Brewster-angle windows

Minh Quang Tran, Konstantinos Avramidis

In the frame of the EUROfusion Work Package Heating and Current Drive (WP HCD) of the Power Plant Physics and Technology (PPPT) program, CVD diamond disk Brewster-angle windows for gyrotron operation at multi-megawatt RF power levels and long pulses are un ...

2020

Énergie de fusion nucléaire

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CEA Broad Studies on EU DEMO CS and PF Magnet Systems

Experimental verification of X-point potential well formation in unfavorable magnetic field direction

AC Loss Measurement of the DEMO TF React&Wind Conductor Prototype No. 2

A new mechanism for filament disconnection at the X-point: poloidal shear in radial E × B velocity

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

Modeling of the response function of CdTe detectors for a hard X-ray synthetic diagnostic

Ultra-compact spoof surface plasmon polariton waveguides and notch filters based on double-sided parallel-strip lines

Progress Toward Interpretable Machine Learning-Based Disruption Predictors Across Tokamaks

Ensemble Distillation for Robust Model Fusion in Federated Learning

Towards large area CVD diamond disks for Brewster-angle windows

CEA Broad Studies on EU DEMO CS and PF Magnet Systems

A new mechanism for filament disconnection at the X-point: poloidal shear in radial E × B velocity

Modeling of the response function of CdTe detectors for a hard X-ray synthetic diagnostic

Ultra-compact spoof surface plasmon polariton waveguides and notch filters based on double-sided parallel-strip lines

Towards large area CVD diamond disks for Brewster-angle windows

Progress Toward Interpretable Machine Learning-Based Disruption Predictors Across Tokamaks

Ensemble Distillation for Robust Model Fusion in Federated Learning

Experimental verification of X-point potential well formation in unfavorable magnetic field direction

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

AC Loss Measurement of the DEMO TF React&Wind Conductor Prototype No. 2