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Cristian Galperti

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Publications associées (58)

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Full conversion from ohmic to runaway electron driven current via massive gas injection in the TCV tokamak

Olivier Sauter, Stefano Coda, Basil Duval, Patrick Blanchard, Benoît Labit, Joan Decker, Umar Sheikh, Cristian Galperti

Full conversion from ohmic to runaway electron (RE) driven current was observed in the tokamak a configuration variable (TCV) following massive injection of neon through a disruption mitigation valve into a low-density limited circular plasma. Following a ...

IOP Publishing Ltd2022

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

Olivier Sauter, Ambrogio Fasoli, Basil Duval, Henri Weisen, Timothy Goodman, Jonathan Graves, Stefano Coda, Yves Martin, Jean-Marc Moret, Stefano Alberti, Ivo Furno, Duccio Testa, Minh Quang Tran, Paolo Ricci, Patrick Blanchard, Yann Camenen, Jan Horacek, Holger Reimerdes, Marco Wischmeier, Benoît Labit, Nicola Vianello, Jean-Philippe Hogge, Christian Gabriel Theiler, Federico Nespoli, Alessandro Pau, Federico Alberto Alfredo Felici, Laurie Porte, Alexander Karpushov, Antoine Pierre Emmanuel Alexis Merle, Joan Decker, Xavier Llobet, Fabio Riva, Umar Sheikh, Cristian Galperti, Cedric Kar-Wai Tsui, Christian Schlatter, Kevin Henricus Annemarie Verhaegh, Wouter Vijvers, Anna Teplukhina, Yanis Andrebe, Roberto Maurizio, Zhouji Huang, Rémy Jacquier, Claudio Marini, Mengdi Kong, Hoang Bao Le, Oulfa Chellaï, Himank Anand, Falk Hans Braunmüller, Francesco Carpanese, Josef Kamleitner, Pedro Andres Molina Cabrera, Joyeeta Sinha

IOP Publishing Ltd2017

First operations with the new Collective Thomson Scattering diagnostic on the Frascati Tokamak Upgrade device

Cristian Galperti, Gabriele Grosso

Anomalous emissions were found over the last few years in spectra of Collective Thomson Scattering (CTS) diagnostics in tokamak devices such as TEXTOR, ASDEX and FTU, in addition to real CTS signals. The signal frequency, down-shifted with respect to the p ...

Iop Publishing Ltd2015

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

Olivier Sauter, Jean-Marc Moret, Federico Alberto Alfredo Felici, Antoine Pierre Emmanuel Alexis Merle, Cristian Galperti, Mengdi Kong, Anna Teplukhina, 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

Implementation of an Iter-relevant Qp-based Current Limit Avoidance Algorithm in the Tcv Tokamak

Stefano Coda, Cristian Galperti, Adriano Mele

The problem of avoiding saturation of the coil currents is critical in large tokamaks with superconducting coils like ITER. Indeed, if the current limits are reached, a loss of control of the plasma may lead to a major disruption. Therefore, a current limi ...

IOP Publishing Ltd2025

Density limit studies in the tokamak and the reversed-field pinch

Cristian Galperti, Nicola Vianello

The ITER scenarios and the project of DEMO involve stable operation above the Greenwald density, which justifies efforts to understand and overcome the density limit, this last observed as a disruptive termination of tokamak discharges and a thermal crash ...

International Atomic Energy Agency2015

A novel plasma position and shape controller for advanced configuration development on the TCV tokamak

Stefano Coda, Jean-Marc Moret, Federico Alberto Alfredo Felici, Cristian Galperti, Himank Anand

A novel plasma position and shape controller has been developed for the highly flexible shaping poloidal-field coil set of the TCV tokamak, to aid in the precise control of advanced configurations such as negative-triangularity plasmas, snowflake and super ...

IOP Publishing Ltd2017

Physics-based control of neoclassical tearing modes on TCV

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

This paper presents recent progress in studies of neoclassical tearing modes (NTMs) on TCV, concerning the new physics learned and how this physics contributes to a better real-time (RT) control of NTMs. A simple technique that adds a small (sinusoidal) sw ...

IOP Publishing Ltd2022

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

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

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

Model-based real-time power flux estimator for the ITER first wall

Stefano Coda, Richard Pitts, Cristian Galperti, Himank Anand

The actively cooled technology used for the plasma facing components demands monitoring and control of heat flux on ITER first wall (FW) panels. Intense heat loads are predicted on the FW, even well before the burning plasma phase. Thus, a real-time (RT) F ...

ELSEVIER SCIENCE SA2018

Automated shot-to-shot optimization of the plasma start-up scenario in the TCV tokamak

Antoine Maier, Stefano Coda, Basil Duval, Federico Alberto Alfredo Felici, Antoine Pierre Emmanuel Alexis Merle, Cristian Galperti, Pedro Andres Molina Cabrera, Artur Perek, Curdin Tobias Wüthrich, Benjamin Alexandre Vincent

Plasma start-up is typically achieved manipulating poloidal magnetic fields, gas injection and possibly auxiliary heating. Model-based design techniques have been gaining increasing attention in view of future large tokamaks which have more stringent const ...

IOP Publishing Ltd2024

Advances in the FTU collective Thomson scattering system

Cristian Galperti, Gabriele Grosso

The new collective Thomson scattering diagnostic installed on the Frascati Tokamak Upgrade device started its first operations in 2014. The ongoing experiments investigate the presence of signals synchronous with rotating tearing mode islands, possibly due ...

Amer Inst Physics2016

A distributed real-time diagnostic and control network for the TCV tokamak based on the Data Distribution Service

Roberto Masocco, Cristian Galperti, Alessandro Tenaglia

A novel communication network is being implemented on the machines composing the Système de Contrôle Distribué (SCD) that form the real-time architecture of the Tokamak à Configuration Variable (TCV), exploiting the capabilities of the Data Distribution Se ...

2025

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

Telmo David Ribeiro Da Costa, Pedro Filipe Varela Saraiva, Olivier Sauter, Stefano Coda, Basil Duval, Timothy Goodman, Patrick Blanchard, Richard Pitts, Yves Martin, Javier García Hernández, Bruno Marchand, Duccio Testa, Jean-Marc Moret, Alessandro Pau, Federico Alberto Alfredo Felici, Roland Behn, Benoît Labit, Jan Horacek, Yann Camenen, Holger Reimerdes, Laurie Porte, Christian Gabriel Theiler, Marco Wischmeier, Marc Gruber, Alexander Karpushov, Antonio José Pereira de Figueiredo, Alberto Bottino, Emiliano Fable, Patrycja Nowak-Sliwinska, Doohyun Kim, Federico Nespoli, Antoine Pierre Emmanuel Alexis Merle, Andrea Scarabosio, Umar Sheikh, Wouter Vijvers, Matteo Fontana, Yanis Andrebe, Cristian Galperti, Haomin Sun, Joan Decker, Zhouji Huang, Ben McMillan, Cedric Kar-Wai Tsui, Diego Carnevale, Janir Nuno Ramos Antunes Da Cruz, Nicola Vianello, Cristian Sommariva, Pedro Andres Molina Cabrera, Anna Teplukhina, Hoang Bao Le, Kevin Henricus Annemarie Verhaegh, Jennifer Kaitlyn Olsen, Jose Vicente Sanchez Mut, Dávid Wágner, Jose Felix Vega Stavro, Lorenzo Anton-Louis Talà, Claudio Marini, Pamela Solange Valdés Undurraga, Wei Zhang, Lenke Horváth, Attila Bencze, Himank Anand, Dahye Choi, Andrea Salmi, Raffaele Tito D'Agnolo, Erwan Fabrice Koch, Hugo Antoine Georges Arnichand, Thomas Binderup Jensen, Allan Svejstrup Nielsen, Michael Oliver Reinke, Pierre Jacquot, Stefano Mattei, Daniel Molina Romero, Ana Susnjara, Anton Malygin, Mélanie Preynas, Thomas Riedl, Mateusz Gospodarczyk, Pascal Morel, Wen Bin Chng

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

Model-based impurity emission front control using deuterium fueling and nitrogen seeding in TCV (vol 63, 026006, 2023)

Basil Duval, Christian Gabriel Theiler, Cristian Galperti, Artur Perek

In the published paper titled 'Model-based impurity emission front control using deuterium fueling and nitrogen seeding in TCV' (2023 Nucl. Fusion 63 026006), the legend of figure 5 shows the wrong colors: red and blue are switched. This corrigendum provid ...

IOP Publishing Ltd2023

Simulation validation of an Extremum Seeking-based Vertical Stabilization system for TCV

Federico Alberto Alfredo Felici, Antoine Pierre Emmanuel Alexis Merle, Cristian Galperti, Stefano Marchioni, Adriano Mele, Alessandro Tenaglia

This paper presents a preliminary assessment of the Extremum Seeking-based Vertical Stabilization system originally proposed in Dubbioso et al. (2022), in view of possible deployment on the TCV tokamak. The control algorithm has been modified to adapt it t ...

2025

Physics research on the TCV tokamak facility: from conventional to alternative scenarios and beyond

Léa Fadil, Olivier Sauter, Ambrogio Fasoli, Stefano Coda, Basil Duval, Henri Weisen, Timothy Goodman, Yves Martin, Stefano Alberti, Yann Camenen, Jan Horacek, Javier García Hernández, Duccio Testa, Marco Wischmeier, Jean-Marc Moret, Ivo Furno, Nicola Vianello, Federico Nespoli, Minh Quang Tran, Patrick Blanchard, Alessandro Pau, Davide Galassi, Benoît Labit, Paolo Ricci, Jean-Philippe Hogge, Jonathan Graves, Holger Reimerdes, Laurie Porte, Christian Gabriel Theiler, Federico Alberto Alfredo Felici, Alexander Karpushov, Antoine Pierre Emmanuel Alexis Merle, Cedric Kar-Wai Tsui, Christian Schlatter, Kevin Henricus Annemarie Verhaegh, Umar Sheikh, Wouter Vijvers, Xavier Llobet, Anna Teplukhina, Matteo Fontana, Yanis Andrebe, Cristian Galperti, Joan Decker, Zhouji Huang, Artur Perek, Marcelo Baquero Ruiz, Alberto Mariani, Matteo Vallar, Justin Richard Ball, Mengdi Kong, Hugo De Oliveira, Claudio Marini, Rémy Jacquier, Pedro Andres Molina Cabrera, Filippo Bagnato, Roberto Maurizio, Oulfa Chellaï, Himank Anand, Mirko Wensing, Francesco Carpanese, Aylwin Iantchenko, Dahye Choi, Federico Pesamosca, Hugo Antoine Georges Arnichand, Arsène Stéphane Tema Biwole, Lorenzo Stipani, Anna Ngoc Minh Trang Vu, Joyeeta Sinha, Nicola Offeddu, Joshua Nathaniel Hawke

IOP Publishing Ltd2019

Control of NTMs and integrated multi-actuator control on TCV

2018