Author: Kaku, R.
Paper Title Page
THPOW006 A Study of Operational Lifetime of CsK2Sb Photo-cathode 3938
  • A. Yokota, R. Kaku, M. Kuriki, K. Negishi, M. Urano
    HU/AdSM, Higashi-Hiroshima, Japan
  • Y. Seimiya
    KEK, Ibaraki, Japan
  A high performance electron beam generated with a laser photo-cathode is one of the most important pieces in the advanced accelerator. Because the CsK2Sb photo-cathode is robust with more than 10 % quantum efficiency (QE) by green laser (532nm), it is considered to be the best candidates of the cathode for Energy Recovery Lin-ac (ERL) and Free Electron Laser (FEL) requiring a high brightness beam. We developed a system to evaporate the cathode as a thin film in vacuum to study the cathode performance. The cathode operational lifetime regarding not only on time, but also extracted charge density was studied. We found the lifetime is long enough for practical use in an accelerator.  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-THPOW006  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)