Mechanical design aspects of a "Long-Waveguide" version of the remote steering ECRH upper port launcher for ITER

TitleMechanical design aspects of a "Long-Waveguide" version of the remote steering ECRH upper port launcher for ITER
Publication TypeJournal Article
Year of Publication2008
AuthorsD.MS Ronden, M. van den Berg, W.A Bongers, B.SQ Elzendoorn, MF Graswinckel, B. Lamers, K. Van Nigtevecht, A.GA Verhoeven, M.A Henderson
JournalFusion Science and Technology
Volume53
Number1
Pagination104-113
Date PublishedJan
Type of ArticleArticle
ISBN Number1536-1055
Accession NumberISI:000252680200012
KeywordsITER ECRH, launcher, remote steering
Abstract

The current status of the mechanical design of the remote steering electron cyclotron resonance heating upper port launching system for ITER is presented. Although an alternative front steering launcher has now been selected as the reference design for ITER, the development of a remote steering launcher continues so that it can be used as a backup solution and as a candidate for DEMO. Since earlier proposals of a remote steering launcher could not fulfill the design criteria with respect to physics performance and because a number of engineering issues remained that have proven to be very difficult to solve, a change was applied to its layout. By increasing the length of the square waveguides that form the heart of the remote steering design, the layout of the optics could be further optimized so that the performance could be improved, while a number of engineering issues could be solved. This paper provides a brief description of the previous design followed by the modifications taken in the optical design to improve the physics performance by reducing the beam size at the resonance location. A first indication is given that the expected reduction of beam size at the resonance location is more than 30%, relative to earlier designs.

URL<Go to ISI>://000252680200012
Division

Fusion Physics

PID

ae2ac3cf92807cb87407008d016c5631

Alternate TitleFusion Sci. Technol.

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