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Stefano Alberti

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Publications associées (139)

Millimeter-Wave Beam Scattering by Field-Aligned Blobs in Simple Magnetized Toroidal Plasmas

Stefano Alberti, Timothy Goodman, Ivo Furno, Gennady Plyushchev, Oulfa Chellaï, Emanuele Poli, Marcelo Baquero Ruiz, Fabian Manke

2018

High-Field Liquid-State Dynamic Nuclear Polarization in Microliter Samples

Stefano Alberti, Jean-Philippe Ansermet, Emile Jacques de Rijk, Jérémy Genoud

2018

Homogenization theory for the effective permittivity of a turbulent tokamak plasma in the scrape-off layer

Stefano Alberti, Ivo Furno, Oulfa Chellaï

There has been a growing interest, over the past few years, on understanding the effect on radio frequency waves due to turbulence in the scrape-off layer of tokamak plasmas. While the far scrape-off layer density width is of the order of centimetres in co ...

Cambridge University Press2018

Novel diagnostic for precise measurement of the modulation frequency of Seeded Self-Modulation via Coherent Transition Radiation in AWAKE

Stefano Alberti

We present the set-up and test-measurements of a waveguide-integrated heterodyne diagnostic for coherent transition radiation (CTR) in the AWAKE experiment. The goal of the proof-of-principle experiment AWAKE is to accelerate a witness electron bunch in th ...

2018

Optically isolated millimeter-wave detector for the Toroidal Plasma Experiment

Stefano Alberti, Timothy Goodman, Anja Skrivervik, Ivo Furno, Gennady Plyushchev, Oulfa Chellaï, Marcelo Baquero Ruiz, Fabian Manke

We have designed and built an optically isolated millimeter-wave detection system to prevent interference from a nearby, powerful, 2.45 GHz microwave source in millimeter-wave propagation experiments in the TORoroidal Plasma EXperiment (TORPEX). A series o ...

2018

Sliding Surface Based Schemes for the Tokamak a Configuration Variable

Patrick Blanchard, Stefano Alberti, Basil Duval, Ambrogio Fasoli, Timothy Goodman, Xavier Llobet, Yves Martin, Jean-Marc Moret, Olivier Sauter, Minh Quang Tran, Henri Weisen, Ivo Furno, Holger Reimerdes, Jean-Philippe Hogge, Stefano Coda, Christian Schlatter, Marco Wischmeier, Jan Horacek, Alexander Karpushov, Laurie Porte, Yanis Andrebe, Yann Camenen, Jonathan Graves, Bernard Schneider, Duccio Testa, Benoît Labit, Rémy Jacquier, Paolo Ricci, Christian Gabriel Theiler, Federico Alberto Alfredo Felici, Miguel Filipe Silva Füglister, Fabio Riva, Wouter Vijvers, Josef Kamleitner, Hoang Bao Le, Zhouji Huang, Himank Anand, Falk Hans Braunmüller, Joyeeta Sinha, Claudio Marini, Antoine Pierre Emmanuel Alexis Merle, , , , , , , , , , , , , , , , , , ,

EU DEMO EC system preliminary conceptual design

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

The engineering design and R&D of auxiliary heating systems and their sub-systems are a key activities in the frame of the present conceptual design phase for a first of a kind DEMOnstration Fusion Power Plant in order to develop a system capable of achiev ...

ELSEVIER SCIENCE SA2018

Plasma cleaning of ITER first mirrors

Stefano Alberti, Ivo Furno

Nuclear fusion is an extremely attractive option for future generations to compete with the strong increase in energy consumption. Proper control of the fusion plasma is mandatory to reach the ambitious objectives set while preserving the machine's integri ...

Iop Publishing Ltd2017

Conceptual design of the EU DEMO EC-system: main developments and R&D achievements

Stefano Alberti, Minh Quang Tran, Ioannis Pagonakis, Falk Hans Braunmüller, Konstantinos Avramidis, Emanuele Poli

For the development of a DEMOnstration Fusion Power Plant the design of auxiliary heating systems is a key activity in order to achieve controlled burning plasma. The present heating mix considers electron cyclotron resonance heating (ECRH), neutral beam i ...

IOP Publishing Ltd2017

TCV divertor upgrade for alternative magnetic configurations

Patrick Blanchard, Stefano Alberti, René Chavan, Basil Duval, Ambrogio Fasoli, Yves Martin, Jean-Marc Moret, Holger Reimerdes, Stefano Coda, Pierluigi Bruzzone, Marco Wischmeier, Duccio Testa, Benoît Labit, Christian Gabriel Theiler, Matthieu Toussaint, Davide Uglietti, Umar Sheikh, Nicola Vianello

The Swiss Plasma Center (SPC) is planning a divertor upgrade for the TCV tokamak. The upgrade aims at extending the research of conventional and alternative divertor configurations to operational scenarios and divertor regimes of greater relevance for a fu ...

Elsevier2017

Overview of the TCV tokamak program: scientific progress and facility upgrades

Patrick Blanchard, Stefano Alberti, Basil Duval, Ambrogio Fasoli, Timothy Goodman, Xavier Llobet, Yves Martin, Jean-Marc Moret, Olivier Sauter, Minh Quang Tran, Henri Weisen, Ivo Furno, Holger Reimerdes, Jean-Philippe Hogge, Stefano Coda, Christian Schlatter, Marco Wischmeier, Jan Horacek, Alexander Karpushov, Laurie Porte, Yanis Andrebe, Yann Camenen, Jonathan Graves, Duccio Testa, Benoît Labit, Rémy Jacquier, Paolo Ricci, Christian Gabriel Theiler, Federico Alberto Alfredo Felici, Fabio Riva, Wouter Vijvers, Josef Kamleitner, Hoang Bao Le, Zhouji Huang, Himank Anand, Falk Hans Braunmüller, Joyeeta Sinha, Claudio Marini, Antoine Pierre Emmanuel Alexis Merle, Federico Nespoli, Oulfa Chellaï, , , , , , , , , , , , , , ,

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

Embedded control systems for gyrotrons applications based on NI solutions

Stefano Alberti, Philippe Cuanillon, Damien Fasel, Pierre-François Isoz, Albert Perez, Jean-Philippe Hogge, Ugo Siravo, Jérémie Dubray, Steve Couturier

2017

Linear and non-linear studies of spurious backward-wave instabilities in a smooth-wall gyrotron beam duct

Stefano Alberti, Trach-Minh Tran, Jérémy Genoud

Recently developed self-consistent models for beam-wave interaction simulations of a gyrotron oscillator are used to study spurious backward-wave instabilities in smooth-wall metallic beam ducts. Starting from a simple case with a basic geometry, the influ ...

2017

Experimental study of high power mm-waves scattering by plasma turbulence in TCV plasmas

Stefano Alberti, Timothy Goodman, Ivo Furno, Gennady Plyushchev, Oulfa Chellaï, Marcelo Baquero Ruiz, Fabian Manke

Understanding the propagation of high power mm-wave in plasmas is of tremendous importance in the route to fusion considering their extensive use in magnetically confined fusion devices. Mm-beams, launched from the outside of the vessel must propagate thro ...

2017

Novel linear analysis for a gyrotron oscillator based on a spectral approach

Stefano Alberti, Minh Quang Tran, Trach-Minh Tran, Jean-Philippe Hogge, Jérémy Genoud

With the aim of gaining a better physical insight into linear regimes in gyrotrons, a new linear model was developed. This model is based on a spectral approach for solving the self-consistent system of equations describing the wave-particle interaction in ...

American Institute of Physics (AIP)2016

Start-up scenario studies in gyrotron oscillator using a novel linear and spectral code

Stefano Alberti, Minh Quang Tran, Trach-Minh Tran, Jean-Philippe Hogge, Jérémy Genoud

A linear and spectral model has recently been developed [1], describing the self-consistent wave-particle interaction in a gyrotron oscillator. The spectral approach, compared to commonly used time-evolution approaches, has the possibility to describe all ...

IEEE2016

500-fold enhancement of in situ 13C liquid state NMR using gyrotron-driven temperature-jump DNP

Stefano Alberti, Jérémy Genoud

A 550-fold increase in the liquid state C-13 NMR signal of a 50 mu L sample was obtained by first hyperpolarizing the sample at 20 K using a gyrotron (260 GHz), then, switching its frequency in order to apply 100 W for 1.5 s so as to melt the sample, final ...

Academic Press Inc - Elsevier Science2016

Manufacturing and Tests of the European 1 MW, 170 GHz CW Gyrotron Prototype for ITER

Stefano Alberti, Jean-Philippe Hogge, Konstantinos Avramidis

An industrial 1 MW, 170 GHz continuous-wave (CW) gyrotron prototype has been manufactured in 2015 at Thales. The physical design is provided by the European GYrotron Consortium (EGYC) and is supported by the construction and the measurement of a modular sh ...

IEEE2016

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Pedro Andres Molina Cabrera

Matteo Fontana

Umar Sheikh

Cristian Galperti

Kevin Henricus Annemarie Verhaegh

Fusion power may be seen as the energy of the future in the sense that it composes a potentially clean, cheap and unlimited power source that would reduce the worldwide dependency on non-renewable energies. Nevertheless, while nowadays the fusion reaction ...

IEEE2018

Pedro Andres Molina Cabrera

Umar Sheikh

Cristian Galperti

Kevin Henricus Annemarie Verhaegh

IOP Publishing Ltd2017