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

    Research output: Contribution to journalConference articleResearchpeer-review

    Abstract

    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.
    Original languageEnglish
    JournalFusion Science and Technology
    Volume53
    Issue number1
    Pages (from-to)69-76
    ISSN1536-1055
    Publication statusPublished - 2008
    Event14th Joint Workshop on Electron Cyclotron Emission and Electron Cyclotron Resonance Heating - Santorini Island, Greece
    Duration: 9 May 200612 May 2006

    Conference

    Conference14th Joint Workshop on Electron Cyclotron Emission and Electron Cyclotron Resonance Heating
    CountryGreece
    CitySantorini Island
    Period09/05/200612/05/2006

    Cite this

    Tsakadze, E., Bindslev, H., Korsholm, S. B., Larsen, A. W., Meo, F., Michelsen, P., Michelsen, S., Nielsen, A. H., Nimb, S. R., Lauritzen, B., Nonbøl, E., & Dubois, N. (2008). Fast ion collective Thomson scattering diagnostic for ITER: Design elements. Fusion Science and Technology, 53(1), 69-76.