Development of a photocathode test bench using a CRYO-pump and a neg pump

D. Kubo, M. Kuriki, H. Iijima, K. Ito, C. Shonaka, Y. Masumoto, Nobuyuki Nishimori, M. Yamamoto

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

    Abstract

    The Beam Physics Laboratory of Hiroshima University studys photo-cathode for future acceleators by using a photo-cathode test bench. It aims to develop a cathode with the higher quantum efficiency and longer-lifetime. GaAs with Negative Electron Affinity (NEA) surface is one of the best cathode among the advanced cathode matrials. The NEA surface is essential to activate it as an electron source. It is well known that the NEA GaAs photo-cathode needs extremely high vacuum, because it is easily damaged. To study the detail process of the cathode property degradation by the damage, we construct a photo-cathode test bench with an extremely high vacuum quality based on a cryo-pump (2700l/s) and a NEG pump (1900l/s). The vacuum chamber is made of titanium (TP340) for low outgassing rate. We alredy obtain 1.7E-9Pa only with the cryo-pump. In this article, the test bench is briefly explained and the results of the first vacuum test is presented.

    Original languageEnglish
    Title of host publicationIPAC 2010 - 1st International Particle Accelerator Conference
    Pages2326-2328
    Number of pages3
    Publication statusPublished - 2010 Dec 1
    Event1st International Particle Accelerator Conference, IPAC 2010 - Kyoto, Japan
    Duration: 2010 May 232010 May 28

    Publication series

    NameIPAC 2010 - 1st International Particle Accelerator Conference

    Other

    Other1st International Particle Accelerator Conference, IPAC 2010
    Country/TerritoryJapan
    CityKyoto
    Period10/5/2310/5/28

    ASJC Scopus subject areas

    • Nuclear and High Energy Physics

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