Journal
FUSION ENGINEERING AND DESIGN
Volume 89, Issue 3, Pages 233-242Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.fusengdes.2013.06.010
Keywords
Plasma axisymmetric magnetic control; JET tokamak; ITER-like wall; Real-time systems
Categories
Funding
- EURATOM
- EPSRC [EP/I501045/1] Funding Source: UKRI
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The upgrade of Joint European Torus (JET) to a new all-metal wall, the so-called ITER-like wall (ILW), has posed a set of new challenges regarding both machine operation and protection. The plasma position and current control (PPCC) system plays a crucial role in minimizing the possibility that the plasma could permanently damage the ILW. The installation of the ILW has driven a number of upgrades of the two PPCC components, namely the Vertical Stabilization (VS) system and the Shape Controller (SC). The VS system has been enhanced in order to speed up its response and to withstand larger perturbations. The SC upgrade includes three new features: an improved termination management system, the current limit avoidance system, and the PFX-on-early-task. This paper describes the PPCC upgrades listed above, focusing on the implementation issues and on the experimental results achieved during the 2011-12 JET experimental campaigns. (C) 2013 Elsevier B.V. All rights reserved.
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