Keyword: brightness
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TUPLR013 Lifetime Study of CKk2Sb Robust Photo-Cathode for a High Brightness Electron Source cathode, laser, vacuum, electron 500
 
  • M. Kuriki, Y. Seimiya
    KEK, Ibaraki, Japan
  • L. Guo, K. Moriya, M. Urano, A. Yokota
    HU/AdSM, Higashi-Hiroshima, Japan
  • K. Negishi
    Iwate University, Morioka, Iwate, Japan
 
  CsK2Sb photo-cathode is one of the ideal cathode for accelerators requiring the high brightness electron beam. It can be driven with a green laser which can be generated as SHG from solid state laser. The QE (Quantum Efficiency) of photo-electron emission is as high as more than 10% with 532nm light. In this article, the robustness of the cathode is studied. Two indexes of lifetime regarding to time and extracted charge density were evaluated experimentally. The result shows that the cathode is robust enough for a high brightness accelerator.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2016-TUPLR013  
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TUPLR015 Design of a Gamma-Ray Source Based on Inverse Compton Scattering at the Fast Superconducting Linac laser, electron, photon, cavity 503
 
  • D. Mihalcea
    Northern Illinois University, DeKalb, Illinois, USA
  • B.T. Jacobson, A.Y. Murokh
    RadiaBeam, Santa Monica, California, USA
  • P. Piot, J. Ruan
    Fermilab, Batavia, Illinois, USA
 
  Funding: This work is sponsored by the DNDO via contract with NIU.
A Watt-level average-power gamma-ray source is currently under development at the FermiLab Accelerator Science & Technology (FAST) facility. The source is based on the inverse Compton scattering of a high-brightness 300-MeV beam against a high-power laser beam circulating in an optical cavity. The back scattered gamma rays are expected to have photon energies up to 1.5 MeV. This paper discusses the optimization of the source, its performance and the main challenges ahead.
 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2016-TUPLR015  
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