Speaker
Wolfgang Treutterer
(E1)
Description
Design of the ITER plasma control system is proceeding towards its next - preliminary design - stage. During the conceptual design in 2013 an overall assessment of high-level control tasks and their relationships has been conducted. The goal of the preliminary design is to show, that a reasonable implementation of the proposed concepts exists which fulfills the high-level requirements and is suitable for realistic use cases. This verification is conducted with focus on the concrete use cases of early operation and first plasma, since these phases are mandatory for ITER startup.
In particular, detailed control requirements and functions for first plasma operation including breakdown, burn-through and ramp-up in L-mode, as well as for planned or exceptional shutdown are identified. Control functions related to those operational phases and the underlying control system architecture are modeled covering nominal operation, as well as critical or frequent exceptional cases requiring off-normal response. The goal is to check whether the flexibility of the conceptual architectural approach is adequate also in consideration of the more elaborate definitions for control functions and their interactions. In addition, architecture shall already be prepared for extension to H-mode operation and burn-control, even if the related control functions are only roughly defined at the moment.
As a consequence, the architectural design is amended where necessary and converted into base components and infrastructure services allowing to deploy control and exception handling algorithms for the concrete first-plasma operation. The investigations will be backed up with simulations comprising simplified plasma models as well as control functions embedded in the envisaged control system architecture.
Co-authors
Christopher Rapson
(E1, Max-Planck Institute for Plasma Physics, Garching, Garching, Germany)
David Humphreys
(General Atomics, PO Box 85608, San Diego, CA 92186-5608, United States)
Gerhard Raupp
(E1, Max-Planck Institute for Plasma Physics, Garching, Garching, Germany)
Gianmaria de Tommasi
(CREATE, Università di Napoli Federico II, Napoli, Italy)
Marcello Cinque
(CREATE, Università di Napoli Federico II, Napoli, Italy)
Michael Walker
(General Atomics, PO Box 85608, San Diego, CA 92186-5608, United States)
Phillipe Moreau
(Association CEA pour la Fusion Contrôlée, CEA Cadarache - 13108 St Paul les Durance, France)
Robert Felton
(CCFE Fusion Association, Culham Centre for Fusion Energy, Culham Science Centre, Oxfordshire, OX14 3DB, United Kingdom)
Sylvain Bremond
(Association CEA pour la Fusion Contrôlée, CEA Cadarache - 13108 St Paul les Durance, France)
Wolfgang Treutterer
(E1, Max-Planck Institute for Plasma Physics, Garching, Garching, Germany)
