Development of a 500-KV photo-cathodedc gun for the erl light sources in Japan

N. Nishimori, R. Nagai, H. Iijima, R. Hajima, M. Yamamoto, T. Muto, Y. Honda, T. Miyajima, M. Kuriki, M. Kuwahara, S. Okumi, T. Nakanishi

    Research output: Contribution to conferencePaperpeer-review

    5 Citations (Scopus)

    Abstract

    Energy recovery linac (ERL) based next generation light source such as X-ray FEL requires high brightness electron gun. We have developed a 500-kV, 10-mA photocath-ode DC gun. A segmented ceramic insulator with guard rings is employed to improve stability and robustness at high voltage operation by keeping field emission electrons away from the ceramic surface. A Cockcroft-Walton power supply and the insulator are installed in a SF6 tank and high voltage test up to 550kV was successfully done without a metal rod which supports a cathode electrode. All the vacuum chambers are made of chemically polished titanium alloy with very low out-gassing. A GaAs photocathode is activated in a separate preparation system. Up-to-date status of the gun development will be presented in detail.

    Original languageEnglish
    Pages277-280
    Number of pages4
    Publication statusPublished - 2009 Dec 1
    Event31st International Free Electron Laser Conference, FEL 2009 - Liverpool, United Kingdom
    Duration: 2009 Aug 232009 Aug 28

    Other

    Other31st International Free Electron Laser Conference, FEL 2009
    Country/TerritoryUnited Kingdom
    CityLiverpool
    Period09/8/2309/8/28

    ASJC Scopus subject areas

    • Nuclear and High Energy Physics

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