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Cristian Galperti

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Publications associées (62)

Real-time feedback control of the impurity emission front in tokamak divertor plasmas

Basil Duval, Christian Gabriel Theiler, Federico Alberto Alfredo Felici, Cristian Galperti, Artur Perek

In magnetic confinement thermonuclear fusion the exhaust of heat and particles from the core remains a major challenge. Heat and particles leaving the core are transported via open magnetic field lines to a region of the reactor wall, called the divertor. ...

Nature Research2021

Integrated Real-Time Supervisory Management for Off-Normal-Event Handling and Feedback Control of Tokamak Plasmas

Olivier Sauter, Federico Alberto Alfredo Felici, Cristian Galperti, Anna Ngoc Minh Trang Vu, Alessandro Pau, Bernhard Sieglin

For long-pulse tokamaks, one of the main challenges in the control strategy is to simultaneously reach multiple control objectives and to robustly handle in real-time (RT) unexpected events [off-normal-events (ONEs)] with a limited set of actuators. We hav ...

2021

First demonstration of real-time kinetic equilibrium reconstruction on TCV by coupling LIUQE and RAPTOR

Jean-Marc Moret, Olivier Sauter, Federico Alberto Alfredo Felici, Antoine Pierre Emmanuel Alexis Merle, Cristian Galperti, Francesco Carpanese

Kinetic equilibrium reconstruction (KER) in tokamaks is the solution of the free-boundary MHD equilibrium that best fits the external magnetic measurements and the internal plasma profiles as imposed from modeling and/or available internal measurements. In ...

IOP Publishing Ltd2020

Correcting for non-periodic behaviour in perturbative experiments: application to heat pulse propagation and modulated gas-puff experiments

Federico Alberto Alfredo Felici, Cristian Galperti

This paper introduces a recent innovation in dealing with non-periodic behavior often referred to as transients in perturbative experiments. These transients can be the result from the unforced response due to the initial condition and other slow trends in ...

2020

New capabilities of the incoherent Thomson scattering diagnostics in the TCV tokamak: divertor and real-time measurements

Patrick Blanchard, Basil Duval, Pierre-François Isoz, Pierre Lavanchy, Xavier Llobet, Blaise Marlétaz, Philippe Marmillod, Yanis Andrebe, Severino Antonioni, Federico Alberto Alfredo Felici, Steve Couturier, Joan Decker, Cristian Galperti

This work reports developments of the incoherent TS diagnostic capabilities in the Tokamak a Configuration Variable (TCV). Their goals are to (i) diagnose the TCV divertor region, and (ii) provide Te and ne profiles of the plasma bulk in real-time. These t ...

IOP PUBLISHING LTD2019

Micro ion beam analysis for the erosion of beryllium marker tiles in a tokamak limiter

Gilles Arnoux, Patrick Blanchard, Basil Duval, Ambrogio Fasoli, Yves Martin, Richard Pitts, Olivier Sauter, Henri Weisen, Stefano Coda, Marco Wischmeier, Jan Horacek, Andrea Scarabosio, Jonathan Graves, Duccio Testa, Mikhail Maslov, Javier García Hernández, David Pfefferlé, Dalziel Joseph Wilson, Jonathan Marc Philippe Faustin, Federico Nespoli, Joan Decker, Cristian Galperti, Antonio José Pereira de Figueiredo, Liang Yao, Yao Zhou, Otto Asunta, Bernhard Sieglin

Beryllium limiter marker tiles were exposed to plasma in the Joint European Torus to diagnose the erosion of main chamber wall materials. A limiter marker tile consists of a beryllium coating layer (7-9 mu m) on the top of bulk beryllium, with a nickel int ...

2019

Model-based real-time plasma electron density profile estimation and control on ASDEX Upgrade and TCV

Federico Alberto Alfredo Felici, Cristian Galperti

Real-time plasma electron density profile estimation and control are essential in the operation of future tokamaks. In particular, the robustness against diagnostics failure and disturbances is important for long pulse operation. ...

ELSEVIER SCIENCE SA2019

Experimental implementation of a real-time power flux estimator for the ITER first wall on the TCV tokamak

Richard Pitts, Stefano Coda, Benoît Labit, Himank Anand, Federico Nespoli, Cristian Galperti

A control-oriented approach to the monitoring of wall power flux densities on ITER has been successfully developed. It is based on real-time equilibrium reconstruction in 2-D which is then used to describe the deposited heat flux as a poloidal flux functio ...

2019

Status, scientific results and technical improvements of the NBH on TCV tokamak

Basil Duval, Ambrogio Fasoli, Timothy Goodman, Stefano Coda, Alexander Karpushov, Duccio Testa, Benoît Labit, Javier García Hernández, Rémy Jacquier, Cristian Galperti, Nicola Vianello, Roberto Maurizio, Matteo Vallar

The TCV tokamak contributes to physics understanding in fusion reactor research by a wide set of experimental tools, like flexible shaping and high power ECRH. A 1MW, 25 keV deuterium heating neutral beam (NB) has been installed in 2015 and it was operated ...

2019

Tokamak-agnostic actuator management for multi-task integrated control with application to TCV and ITER

Olivier Sauter, Federico Alberto Alfredo Felici, Cristian Galperti, Mengdi Kong

The plasma control system (PCS) of a long-pulse tokamak must be able to handle multiple control tasks simultaneously, and must be capable of robust event handling with a limited set of actuators. For ITER, this is particularly challenging given the large n ...

2019

Side emissions during EC injection for PDI studies in FTU tokamak

Gabriele Grosso, Cristian Galperti

The evidence of Parametric Decay Instabilities (PDI) excited by the ECH power injected in O-Mode has been explored in FTU Tokamak, using the Collective Thomson Scattering (CTS) diagnostic. The experiments show evidences to support the hypothesis of low-thr ...

E D P SCIENCES2019

Control of NTMs and integrated multi-actuator plasma control on TCV

Jean-Marc Moret, Olivier Sauter, Federico Alberto Alfredo Felici, Antoine Pierre Emmanuel Alexis Merle, Anna Teplukhina, Emanuele Poli, Cristian Galperti, Mengdi Kong, Francesco Carpanese, Federico Pesamosca, Anna Ngoc Minh Trang Vu

The control of 2/1 neoclassical tearing modes (NTMs) with electron cyclotron (EC) waves has been studied both experimentally and numerically on TCV. Dynamic evolutions of NTMs along with time-varying deposition locations of the control beam have been studi ...

IOP Publishing Ltd2019

Dependence on plasma shape and plasma fueling for small edge-localized mode regimes in TCV and ASDEX Upgrade

Patrick Blanchard, Basil Duval, Timothy Goodman, Jean-Marc Moret, Olivier Sauter, Holger Reimerdes, Stefano Coda, Marco Wischmeier, Jan Horacek, Alexander Karpushov, Laurie Porte, Yanis Andrebe, Yann Camenen, Thomas Binderup Jensen, Duccio Testa, Benoît Labit, Frédéric Dolizy, Emiliano Fable, Javier García Hernández, Ben McMillan, Christian Gabriel Theiler, Federico Alberto Alfredo Felici, Fang Liu, Hugo De Oliveira, Daniele Brunetti, Zhouji Huang, Claudio Marini, Jonathan Marc Philippe Faustin, Antoine Pierre Emmanuel Alexis Merle, Federico Nespoli, Anna Teplukhina, Leonardo Pigatto, Joan Decker, Cedric Kar-Wai Tsui, Pedro Andres Molina Cabrera, Umar Sheikh, Alberto Mariani, Emanuele Poli, Cristian Galperti, Kevin Henricus Annemarie Verhaegh, , , , , , , , , , , , , , , , , ,

A Variable Structure Control Scheme Proposal for the Tokamak a Configuration Variable

Patrick Blanchard, 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, Anna Teplukhina, , , , , , , , , , , , , ,

ELM-induced cold pulse propagation in ASDEX Upgrade

Patrick Blanchard, Roland Behn, Basil Duval, Timothy Goodman, Yves Martin, Jean-Marc Moret, Richard Pitts, Olivier Sauter, Holger Reimerdes, Stefano Coda, Marco Wischmeier, Jan Horacek, Alexander Karpushov, Laurie Porte, Yanis Andrebe, Yann Camenen, Thomas Binderup Jensen, Duccio Testa, Benoît Labit, Emiliano Fable, Javier García Hernández, Ben McMillan, Marc Gruber, Christian Gabriel Theiler, Federico Alberto Alfredo Felici, Dávid Wágner, Attila Bencze, Doohyun Kim, Wouter Vijvers, Hoang Bao Le, Zhouji Huang, Himank Anand, Claudio Marini, Antoine Pierre Emmanuel Alexis Merle, Federico Nespoli, Heinz Mueller, Anna Teplukhina, Joan Decker, Cedric Kar-Wai Tsui, Pedro Andres Molina Cabrera, Matteo Fontana, , , , , , , , , , , ,

Runaway electron beam control

Basil Duval, Stefano Coda, Diego Carnevale, Georgios Pappas, Joan Decker, Umar Sheikh, Cristian Galperti, Filippo Bagnato, Gergely Papp

Post-disruption runaway electron (RE) beams in tokamaks with large current can cause deep melting of the vessel and are one of the major concerns for ITER operations. Consequently, a considerable effort is provided by the scientific community in order to t ...

IOP PUBLISHING LTD2019

A locked mode indicator for disruption prediction on JET and ASDEX upgrade

Patrick Blanchard, Roland Behn, Basil Duval, Ambrogio Fasoli, Timothy Goodman, Yves Martin, Jean-Marc Moret, Richard Pitts, Olivier Sauter, Henri Weisen, Holger Reimerdes, Stefano Coda, Alberto Bottino, Marco Wischmeier, Jan Horacek, Andrea Scarabosio, Hartmut Zohm, Alexander Karpushov, Laurie Porte, Yanis Andrebe, Yann Camenen, Jonathan Graves, Thomas Binderup Jensen, Benoît Labit, Emiliano Fable, Mikhail Maslov, Javier García Hernández, David Pfefferlé, Ben McMillan, Marc Gruber, Christian Gabriel Theiler, Federico Alberto Alfredo Felici, Miguel Filipe Silva Füglister, Dávid Wágner, Attila Bencze, Doohyun Kim, Wouter Vijvers, Hoang Bao Le, Zhouji Huang, Himank Anand, Claudio Marini, , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , ,

Analysis of runaway electron expulsion during tokamak instabilities detected by a single-channel Cherenkov probe in FTU

Gabriele Grosso, Cristian Galperti, Filippo Bagnato

The expulsion of runaway electrons (REs) during different types of tokamak instabilities is analysed by means of a Cherenkov probe inserted into the scrape-off layer of the FTU tokamak. One such type of instability, the well-known tearing mode, is involved ...

IOP Publishing Ltd2019

MANTIS: A real-time quantitative multispectral imaging system for fusion plasmas

Basil Duval, Yanis Andrebe, Wouter Vijvers, Cristian Galperti, Kevin Henricus Annemarie Verhaegh, Artur Perek

This work presents a novel, real-time capable, 10-channel Multispectral Advanced Narrowband Tokamak Imaging System installed on the TCV tokamak, MANTIS. Software and hardware requirements are presented together with the complete system architecture. The im ...

AMER INST PHYSICS2019

Validation of the ICRF antenna coupling code RAPLICASOL against TOPICA and experiments

Patrick Blanchard, Roland Behn, Basil Duval, Timothy Goodman, Pierre Jacquot, Bruno Marchand, Yves Martin, Pascal Morel, Jean-Marc Moret, Richard Pitts, Olivier Sauter, Holger Reimerdes, Stefano Coda, Alberto Bottino, Marco Wischmeier, Jan Horacek, Andrea Scarabosio, Hartmut Zohm, Alexander Karpushov, Laurie Porte, Yanis Andrebe, Yann Camenen, Thomas Binderup Jensen, Duccio Testa, Telmo David Ribeiro Da Costa, Benoît Labit, Emiliano Fable, Patrycja Nowak-Sliwinska, Javier García Hernández, Ben McMillan, Marc Gruber, Christian Gabriel Theiler, Federico Alberto Alfredo Felici, Jose Felix Vega Stavro, Lenke Horváth, Dávid Wágner, Attila Bencze, Thomas Riedl, Lorenzo Anton-Louis Talà, Diego Carnevale, , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , ,

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Nicola Vianello

Antonio José Pereira de Figueiredo

Aylwin Iantchenko

Roberto Maurizio

Francesco Carpanese

Giovanni Tardini

Lorenzo Stipani

Federico Pesamosca

Filippo Bagnato

Bernhard Sieglin

IOP Publishing Ltd2019

Francesco Sciortino

Cedric Kar-Wai Tsui

Cristian Galperti

Kevin Henricus Annemarie Verhaegh

Nicola Vianello

Roberto Maurizio

Francesco Carpanese

Bernhard Sieglin

Fusion power is the most significant prospects in the long-term future of energy in the sense that it composes a potentially clean, cheap, and unlimited power source that would substitute the widespread traditional nonrenewable energies, reducing the geogr ...

2019

Cristian Galperti

Kevin Henricus Annemarie Verhaegh

Nicola Vianello

Antonio José Pereira de Figueiredo

Giovanni Tardini

Cristian Sommariva

Bernhard Sieglin

In ASDEX Upgrade, the propagation of cold pulses induced by type-I edge localized modes (ELMs) is studied using electron cyclotron emission measurements, in a dataset of plasmas with moderate triangularity. It is found that the edge safety factor or the pl ...

2019

Dalziel Joseph Wilson

Jonathan Marc Philippe Faustin

Antoine Pierre Emmanuel Alexis Merle

Federico Nespoli

Anna Teplukhina

Hamish William Patten

Jose Vicente Sanchez Mut

Cedric Kar-Wai Tsui

Pedro Andres Molina Cabrera

Cristian Galperti

Kevin Henricus Annemarie Verhaegh

Nicola Vianello

Antonio José Pereira de Figueiredo

Samuel Lanthaler

Giovanni Tardini

Cristian Sommariva

Bernhard Sieglin

The aim of this paper is to present a signal processing algorithm that, applied to the raw Locked Mode signal, allows us to obtain a disruption indicator in principle exploitable on different tokamaks. A common definition of such an indicator for different ...

2019

Pamela Solange Valdés Undurraga

Michael Oliver Reinke

Antoine Pierre Emmanuel Alexis Merle

Federico Nespoli

Allan Svejstrup Nielsen

Anna Teplukhina

Janir Nuno Ramos Antunes Da Cruz

Jose Vicente Sanchez Mut

Cedric Kar-Wai Tsui

Pedro Andres Molina Cabrera

Cristian Galperti

Kevin Henricus Annemarie Verhaegh

Daniel Molina Romero

Nicola Vianello

Antonio José Pereira de Figueiredo

Giovanni Tardini

Raffaele Tito D'Agnolo

Erwan Fabrice Koch

Jennifer Kaitlyn Olsen

Cristian Sommariva

Bernhard Sieglin

In this paper we validate the finite element code RAPLICASOL, which models radiofrequency wave propagation in edge plasmas near ICRF antennas, against calculations with the TOPICA code. We compare the output of both codes for the ASDEX Upgrade 2-strap ante ...

IOP Publishing Ltd2019