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The Software Architecture of the New Vertical-Stabilization System for the JET Tokamak

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8 Author(s)
Bellizio, T. ; Assoc. EURATOMENEA-CREATE, Univ. di Napoli Federico II, Naples, Italy ; De Tommasi, G. ; McCullen, P. ; Neto, A.C.
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The need to improve the performance of modern tokamak operations has led to a further development of the plasma shape and position control systems. In particular, extremely elongated plasmas, with high vertical-instability growth rate, are envisaged to reach the required performance for ignition. This request for better performance from the experimentalists' side has motivated the development of the new vertical-stabilization (VS) system at the JET tokamak, which has been proposed within the Plasma Control Upgrade project. The main aim of the project is to enhance the capabilities of the plasma vertical position control system in order to operate with very highly elongated plasmas in the presence of large perturbations. This paper focuses on the new software architecture of the VS system, which relies on a highly configurable real-time framework. Due to its flexibility, the new VS system executes different control algorithms, and it schedules the one which maximizes the performance in each plasma phase.

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Plasma Science, IEEE Transactions on  (Volume:38 ,  Issue: 9 )