Quasi-optical high purity HE11-mode exciter for oversized corrugated waveguide transmission

Masatsugu Sakaguchi, Hiroshi Idei, Shin Kubo, Tetsuji Saito, Takashi Shigematsu

    Research output: Contribution to journalArticle

    2 Citations (Scopus)

    Abstract

    Oversized corrugated waveguide transmissions are used to transmit high power millimeter wave for electron cyclotron heating in ITER. The HE11 mode purity of the waveguide components is a critical issue not only in the high power operation but also in the low power operation to evaluate the components. Conventional single Gaussian beam system causes edge diffraction and excites higher order modes at the waveguide aperture. A proposed HE11-mode exciter uses beam interference between two Gaussian beams interference and serves the high purity HE11 mode without the edge diffraction. The HE11-mode exciter consists of a scalar feed horn antenna, quasi-optical mirrors and a beam splitter (combiner). Phase matched mirrors correct the Gaussian-like beam excited from the horn antenna to pure Gaussian beam. Authors report the experimental study of the exciter.

    Original languageEnglish
    Article number2405037
    JournalPlasma and Fusion Research
    Volume7
    Issue numberSPL.ISS.1
    DOIs
    Publication statusPublished - 2012

    All Science Journal Classification (ASJC) codes

    • Condensed Matter Physics

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