Controlled Mirror Motion System for Resonant Diplexers in ECRH Applications

N. Doelman; R. van den Braber; W. Kasparek; V. Erckmann; W. Bongers; B. Krijger; J. Stober; E. Fritz; B. Dekker; W. Klop; F. Hollmann; G. Michel; F. Noke; F. Purps; M. de Baar; M. Maraschek; F. Monaco; S. Müller; H. Schütz; D. Wagner

doi:10.1051/epjconf/20123204005

All issues

Volume 32 (2012)

EPJ Web of Conferences, 32 (2012) 04005

Abstract

Open Access

Issue		EPJ Web of Conferences Volume 32, 2012 EC-17 – 17^th Joint Workshop on Electron Cyclotron Emission and Electron Cyclotron Resonance Heating


Article Number		04005
Number of page(s)		6
Section		Technology session
DOI		https://doi.org/10.1051/epjconf/20123204005
Published online		06 September 2012

EPJ Web of Conferences 32, 04005 (2012)
https://doi.org/10.1051/epjconf/20123204005

Controlled Mirror Motion System for Resonant Diplexers in ECRH Applications

N. Doelman¹^a^,*, R. van den Braber¹, W. Kasparek², V. Erckmann³, W. Bongers⁴, B. Krijger⁴, J. Stober⁵, E. Fritz¹, B. Dekker¹, W. Klop¹, F. Hollmann³, G. Michel³, F. Noke³, F. Purps³, M. de Baar⁴, M. Maraschek⁵, F. Monaco⁵, S. Müller⁵, H. Schütz⁵, D. Wagner⁵, the ASDEX Upgrade Team⁵ and other teams at the contributing institutes¹^,2^,3^,4

¹ TNO, Technical Sciences, Department of OptoMechatronics, NL-2600 AD, Delft, The Netherlands.
² Institut für Plasmaforschung, Universität Stuttgart, D-70569 Stuttgart, Germany.
³ Max-Planck-Institut für Plasmaphysik, EURATOM Association, D-17491 Greifswald, Germany.
⁴ Differ, Dutch Institute for Fundamental Energy Research, Nieuwegein, The Netherlands.
⁵ Max-Planck-Institut für Plasmaphysik, EURATOM Association, D-85748 Garching, Germany.

^a e-mail: niek.doelman@tno.nl

Abstract

High-power resonant diplexers for millimetre waves have various promising applications in ECRH systems. The round-trip resonator length of a diplexer needs to be accurately tuned to match its prescribed functionality. For this purpose one of the mirrors in the FADIS MkIIa diplexer has been mounted on a motion system, in order to control the mirror to its desired location despite the presence of substantial disturbances. The mechanical properties and control strategy for the mirror motion system have been designed such as to meet the overall system requirements. The performance of the motion system has been experimentally validated in various high power mm-wave tests.

^*

The work of TNO has been carried out in the frame of the ITER-NL 2 project, which is supported by the Dutch Ministry of Economic Affairs, in the ‘Fond Economische Structuurversterking’ program.

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