Progress in a photocathode DC gun at the compact ERL

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

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    1 Citation (Scopus)

    Abstract

    The next generation light sources such as energy recovery linac (ERL) light sources and X-ray FEL oscillator require high brightness electron gun with megahertz repetition rate. We have developed a DC photoemission gun at JAEA and demonstrated generation of a 500-keV electron beam from the gun. This demonstration was achieved by addressing a discharge problem that leads to vacuum breakdown of the DC gun. The problem is microdischarge at an anode electrode or a vacuum chamber, which is triggered by microparticle transfer or field emission from a cathode electrode. An experimental investigation has revealed that larger acceleration gap optimized to mainly reduce surface electric field of anode electrode results in suppression of the microdischarge events. The gun was transported to the compact ERL (cERL) at KEK. The commissioning of the injector system of the cERL is under way.

    Original languageEnglish
    Title of host publicationFEL 2013
    Subtitle of host publicationProceedings of the 35th International Free-Electron Laser Conference
    Pages184-188
    Number of pages5
    Publication statusPublished - 2013
    Event35th International Free-Electron Laser Conference, FEL 2013 - New York, NY, United States
    Duration: 2013 Aug 262013 Aug 30

    Publication series

    NameFEL 2013: Proceedings of the 35th International Free-Electron Laser Conference

    Other

    Other35th International Free-Electron Laser Conference, FEL 2013
    Country/TerritoryUnited States
    CityNew York, NY
    Period13/8/2613/8/30

    ASJC Scopus subject areas

    • Electrical and Electronic Engineering

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