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TUPLR013 |
Lifetime Study of CKk2Sb Robust Photo-Cathode for a High Brightness Electron Source |
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- 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
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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.
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DOI • |
reference for this paper
※ https://doi.org/10.18429/JACoW-LINAC2016-TUPLR013
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