Publications by James Paley | EPFL Graph Search

Distributed digital real-time control system for TCV tokamak

Olivier Sauter, Basil Duval, Stefano Coda, Jean-Marc Moret, Federico Alberto Alfredo Felici, Damien Fasel, Philippe Marmillod, James Paley, Hoang Bao Le

A new digital feedback control system (named the SCD "Systeme de Controle Distribue") has been developed, integrated and used successfully to control TCV (Tokamak a Configuration Variable) plasmas. The system is designed to be modular, distributed, and sca ...

Elsevier Science Sa2014

Development of real-time plasma analysis and control algorithms for the TCV tokamak using SIMULINK

Olivier Sauter, Basil Duval, Stefano Coda, Timothy Goodman, Jean-Marc Moret, Federico Alberto Alfredo Felici, Wouter Vijvers, Alessandro Bortolon, James Paley, Lucia Isabel Federspiel

One of the key features of the new digital plasma control system installed on the TCV tokamak is the possibility to rapidly design, test and deploy real-time algorithms. With this flexibility the new control system has been used for a large number of new e ...

Elsevier2013

Magnetic energy flows during the current quench and termination of disruptions with runaway current plateau formation in JET and implications for ITER

James Paley

The magnetic energy balance and magnetic energy flows for plasma disruptions in which runaway plateau plasmas are formed and terminated at JET has been analysed and compared with that of runaway-free disruptions. The analysis shows that the energy loss pro ...

IOP Publishing Ltd2011

Recent Advances in Sawtooth Control

Olivier Sauter, Stefano Coda, Jonathan Graves, James Paley

Important advances have been made recently in the invention and application of experimental methods to control the sawtooth instability in tokamak plasmas. The primary means of control involves the application of either ion cyclotron resonance heating (ICR ...

American Nuclear Society2011

Using APCS for Plasma Vertical Control at TCV

Basil Duval, Stefano Coda, Jean-Marc Moret, Federico Alberto Alfredo Felici, James Paley, Francesco Piras

Early tokamaks with circular cross-section plasmas were vertically stable in nature and no problems were reported on the control of the vertical position. However, the concept of vertically elongated plasma cross-section, with benefits to the energy confin ...

2011

Real-time physics-model-based simulation of the current density profile in tokamak plasmas

Olivier Sauter, Basil Duval, Stefano Coda, Timothy Goodman, Jean-Marc Moret, Federico Alberto Alfredo Felici, James Paley

A new paradigm is presented to reconstruct the plasma current density profile in a tokamak in real-time. The traditional method of basing the reconstruction on real-time diagnostics combined with a real-time Grad-Shafranov solver suffers from the difficult ...

IOP Publishing Ltd2011

Multiple EC power deposition locations tracking by break-in-slope analysis in TCV plasmas

Timothy Goodman, Jean-Marc Moret, Federico Alberto Alfredo Felici, Antoine Pochelon, Joan Decker, James Paley, Loïc Curchod

Modulation of the amplitude of externally injected electron cyclotron (EC) power is a frequent method used to determine the radial power deposition profile in fusion plasmas. There are many tools to analyze the plasma response to the power modulations unde ...

2011

From sawtooth to profile control: developing feedback control using ECRH/ECCD systems on the TCV tokamak

Stefano Coda, Timothy Goodman, Federico Alberto Alfredo Felici, James Paley

Real time control of heating systems is essential to maximize plasma performance and avoid or neutralize instabilities under changing plasma conditions. Several feedback control algorithms have been developed on the Tokamak a Configuration Variable (TCV) t ...

Plasma Phys. Control. Fusion2009

Real time control of plasmas and ECRH systems on TCV

Basil Duval, Stefano Coda, Timothy Goodman, Yves Martin, Jean-Marc Moret, Federico Alberto Alfredo Felici, James Paley, Francesco Piras

Developments in the real time control hardware on Tokamak à Configuration Variable (TCV) coupled with the flexibility of plasma shaping and electron cyclotron (EC) heating and current drive actuators are opening many opportunities to perform real time expe ...

IOP Publishing Ltd2009

Real time control of the sawtooth period using EC launchers

Stefano Coda, Timothy Goodman, Federico Alberto Alfredo Felici, James Paley, Francesco Piras

Tokamak plasmas operating at high performance are limited by several MHD instabilities. The sawtooth instability limits the core plasma pressure and can drive the neoclassical tearing mode unstable, but also prevents accumulation of impurities in the core. ...

Plasma Phys. Control. Fusion2009