Integration of a dog-leg beam routing for the remote steering upper port launcher for ITER

D.M.S. Ronden, W. Bongers, A. Bruschi, B.S.Q. Elzendoorn, M.F. Graswinckel, B. Lamers, A. Moro, E. Poli, A.G.A. Verhoeven

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Abstract

In the course of the development of a remote steering ECRH upper port launcher for ITER, it became clear that a modification could be introduced in the conceptual design in order to solve a number of structural weaknesses. Up to that point, all conceptual layouts were based on each remote steering beamline having a single front mirror placed in front of the square waveguide to aim the beam towards its resonance surface in the plasma. By placing an additional mirror per line inside the front shield of the upper port plug - effectively creating a dogleg routing - a number of structural issues were solved. This modification allows for a decrease of the heat load on the front mirrors and a shift downwards of the launching point. Additionally, through correct placement and focusing of the mirrors, the front shield penetration could be reduced by a factor of 4 and the cut in the blanket module below the upper port could be reduced significantly, while the level of overall performance could be increased as well. In order to visualise this new concept accurately, a more detailed design of the beam propagation was required. Through concerted effort within our institute, two different approaches were made to come to this new design; further advancements of the 3D-model and an Excel-based 2D simulation. This dual approach, together with beam tracing calculations done by affiliated institutes have indicated that the dogleg can prove to be a reliable design for a RS upper port launcher. © 2005 IOP Publishing Ltd.
Original languageEnglish
Pages (from-to)103 - 111
Number of pages9
JournalJournal of Physics: Conference Series
Volume25
Issue number1
DOIs
Publication statusPublished - 1 Jan 2005
Externally publishedYes

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All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

Ronden, D. M. S., Bongers, W., Bruschi, A., Elzendoorn, B. S. Q., Graswinckel, M. F., Lamers, B., ... Verhoeven, A. G. A. (2005). Integration of a dog-leg beam routing for the remote steering upper port launcher for ITER. Journal of Physics: Conference Series, 25(1), 103 - 111. https://doi.org/10.1088/1742-6596/25/1/014