Possible Influence of Edge Density Fluctuations on the Proposed Fast Ion and Alpha Particle Diagnostic for JET

F.R. Hansen, Jens-Peter Lynov, Poul Michelsen, H.L. Pécseli

    Research output: Book/ReportReportResearch

    74 Downloads (Pure)

    Abstract

    The influence of random density fluctuations in a tokamak on the propagation of electromagnetic waves polarised in the ordinary mode is studied numerically. The study is of direct relevance for a proposed fast ion and a-particle diagnostic for JET relying on collective scattering of intense millimetre waves. The wave propagation is studied in the limit of geometrical optics by a ray-tracing code. For overall parameters specified by the contract, it is found that even low levels of relative density fluctuations may lead to a substantial broadening of an incoming wave beam. This effect is particularly pronounced for high values of the central plasma density. The wave beam broadening due to density fluctuations could lead to a degradation in the performance of the proposed diagnostic by limiting its spatial resolution.
    Original languageEnglish
    Place of PublicationRoskilde
    PublisherRisø National Laboratory
    Number of pages24
    ISBN (Print)87-550-1465-8
    Publication statusPublished - 1988
    SeriesRisø-M
    Number2747
    ISSN0418-6435

    Keywords

    • Risø-M-2747

    Fingerprint Dive into the research topics of 'Possible Influence of Edge Density Fluctuations on the Proposed Fast Ion and Alpha Particle Diagnostic for JET'. Together they form a unique fingerprint.

    Cite this