Development of a photoemission DC gun at JAEA

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

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

    2 Citations (Scopus)

    Abstract

    The next generation light source such as X-ray FEL oscillator requires high brightness electron gun with megahertz repetition rate. We have developed a photoemission DC gun at JAEA. By employing a segmented insulator with guard rings, we successfully applied 500 kV on the ceramics with a central stem electrode for eight hours without any discharge in 2009. In 2011 we reached 526 kV with NEG pumps and electrodes in place, before suffering another field emission problem from the cathode electrode. The problem may be attributed to small dust inside our gun chamber. We also generated high current beam up to 10 mA and obtained charge extracted lifetime of 30 C. In this paper, our current status of development will be presented.

    Original languageEnglish
    Title of host publicationFEL 2012 - 34th International Free Electron Laser Conference
    Pages161-164
    Number of pages4
    Publication statusPublished - 2012 Dec 1
    Event34th International Free Electron Laser Conference, FEL 2012 - Nara, Japan
    Duration: 2012 Aug 262012 Aug 31

    Publication series

    NameFEL 2012 - 34th International Free Electron Laser Conference

    Other

    Other34th International Free Electron Laser Conference, FEL 2012
    Country/TerritoryJapan
    CityNara
    Period12/8/2612/8/31

    ASJC Scopus subject areas

    • Nuclear and High Energy Physics

    Fingerprint

    Dive into the research topics of 'Development of a photoemission DC gun at JAEA'. Together they form a unique fingerprint.

    Cite this