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Abstract

The effect of ELMs on the vertical position observer in TCV has been investigated and a new, optimised observer which minimizes the influence of ELMs has been constructed. The new observer has been tested in TCV, under closed loop conditions, and we have shown that it is considerably less sensitive to ELMs than the classical observer. III order to determine whether this method could also be used in JET, we have analyzed ELMy H-mode pulses and VDEs in JET and we have constructed a modified vertical position observer, optimised for JET conditions. We show that, if this new observer were used in JET, the perturbations caused by ELMs would be greatly reduced.

Additional information

Authors: NAVE M.F.F, IST, Lisbon (PT);SARTORI F, UKAEA Culham Science Center (UK);MILANI F, UKAEA Culham Science Center (UK);GERASIMOV S, UKAEA Culham Science Center (UK);SAUTER O, CRPP, EPF-Lausanne (CH);REIMERDES H, CRPP, EPF-Lausanne (CH);MARTIN Y, CRPP, EPF-Lausanne (CH);FURNO I, CRPP, EPF-Lausanne (CH);HOFMANN F, CRPP, EPF-Lausanne (CH)
Bibliographic Reference: An article published in Nuclear Fusion, Volume 42 (2002), 59-65
Record Number: 200013791 / Last updated on: 2002-03-20
Category: PUBLICATION
Original language: en
Available languages: en