Fast ion collective Thomson scattering diagnostic for ITER: Design elements

Erekle Tsakadze, Henrik Bindslev, Søren Bang Korsholm, A.W. Larsen, Fernando Meo, Poul Michelsen, Susanne Michelsen, Anders Henry Nielsen, Søren Robert Nimb, Bent Lauritzen, Erik Nonbøl, Nicolas Dubois

Publikation: Bidrag til tidsskriftKonferenceartikelForskningpeer review

Abstrakt

The proposed fast ion collective Thomson scattering (CTS) diagnostic system for ITER provides the unique capability of measuring the temporally and spatially resolved velocity distribution of the confined fast ions and fusion alpha particles in a burning ITER plasma. The present paper describes the status of the iteration toward the detailed design of the ITER fast ion CTS diagnostic and explains in detail a number of essential considerations and challenges. The diagnostic consists of two separate receiving systems. One system measures the fast ion velocity component in the direction near perpendicular, and the other measures the component near parallel to the magnetic field. Each system has a high-power probe beam at an operating frequency of 60 GHz and a receiver unit. In order to prevent neutron damage to moveable parts, the geometry of the probes and receivers is fixed An array of receivers in each receiving unit ensures simultaneous measurements in multiple scattering volumes. The latter receiving system (resolving the parallel component) is located on the high field side (HFS) of the plasma, and this constitutes a significant challenge. This HFS receiving unit has been central in the studies, and new HFS receiver mock-up measurements are presented as well as neutron flux calculations of the influence of the increased slot height.
OriginalsprogEngelsk
TidsskriftFusion Science and Technology
Vol/bind53
Udgave nummer1
Sider (fra-til)69-76
ISSN1536-1055
StatusUdgivet - 2008
Udgivet eksterntJa
Begivenhed14th Joint Workshop on Electron Cyclotron Emission and Electron Cyclotron Resonance Heating - Santorini Island, Grækenland
Varighed: 9. maj 200612. maj 2006

Konference

Konference14th Joint Workshop on Electron Cyclotron Emission and Electron Cyclotron Resonance Heating
LandGrækenland
BySantorini Island
Periode09/05/200612/05/2006

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