Abstract
Laser triggered photocathodes are key components of the electron sources for the XFELs. Research on semiconductor photocathodes started in the 90s at INFN LASA Milano by studying multialkali antimonied compounds (Cs3Sb, K3Sb, and K2CsSb), showing that the high QE was coupled with very high sensitivity to vacuum pollution. To avoid these deterioration issues, we focused our activity on Cs2Te which, while sensitive to UV light, has better resistance to gas contamination. Since then, we have a dedicated R&D program aimed at developing a always more reliable photocathode and its associated transport systems. Today our photocathodes are used at FLASH and at European XFEL at DESY Hamburg, PITZ at DESY Zeuthen, APEX in LBNL, FAST at FNAL and at LCLS-II at SLAC.
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C.N. Berglund, W.E. Spicer, Photoemission studies of copper and silver: theory. Phys. Rev. 136(4A), A1030–A1044 (1964). https://doi.org/10.1103/PhysRev.136.A1030
J.-P. Carneiro, et al., Beam transport, acceleration and compression studies in the Fermilab high brightness photoinjector, in Proceedings of Linear Accelerator Conference (1998), pp. 878–880
A. di Bona, F. Sabary, S. Valeri, P. Michelato, D. Sertore, G. Suberlucq, Auger a X-ray photoemission spectroscopy study on Cs\(_2\)Te photocathodes. J. Appl. Phys. 80(5), 3024–3030 (1996). https://doi.org/10.1063/1.363161
G. Ferrini, P. Michelato, F. Parmigiani, A Monte Carlo simulation of low energy photoelectron scattering in Cs\(_2\)Te. Solid State Commun. 106, 21–26 (1998). https://doi.org/10.1016/S0038-1098(97)10237-X
K. Floettmann, Note on the thermal emittance of electrons emitted by cesium telluride photo cathodes, in TESLA-FEL Report 1997–01 (1997)
E.O. Kane, Theory of photoelectric emission from semiconductors. Phys. Rev. 127(1), 131–141 (1962). https://doi.org/10.1103/PhysRev.127.131
K.-J. Kim, Brightness, coherence and propagation characteristics of synchrotron radiation. Nucl. Instrum. Meth. Phys. Res. A 246, 71–76 (1986)
P. Michelato, L. Monaco, M. Costogliolo, D. Sertore, Thermal emittance estimation using a time-of-flight spectrometer, in Proceedings of the European Particle Accelerator Conference 2000 (2000), pp. 1669–1671
P. Michelato, L. Monaco, D. Sertore, I. Pollini, Time- and angle-resolved photoelectron spectrometer based on a picosecond Nd:glass laser system. Rev. Sci. Instrum. 74(6), 2977–2982 (2003). https://doi.org/10.1063/1.1574393
L. Monaco, P. MIchelato, D. Sertore, C. Pagani, M. Songini, Multiwavelength optical diagnostic during Cs\(_{2}\)Te photocathodes deposition, in Proceedings of the International Particle Accelerator Conference 2010 (2010), pp. 1719–1721
D. Sertore, S. Schreiber, K. Flottmann, F. Stephan, K. Zapfe, P. Michelato, First operation of cesium telluride photocathodes in the TTF injector RF gun. Nucl. Instrum. Meth. A445, 422–426 (2000). https://doi.org/10.1016/S0168-9002(00)00095-4
D. Sertore, D. Favia, P. Michelato, L. Monaco, P. Pierini, Cesium telluride and metals photoelectron thermal emittance measurements using a time-of-flight spectrometer, in Proceedings of the European Particle Accelerator Conference 2004 (2004), pp. 408–410. https://doi.org/10.1016/S0168-9002(00)00095-4
D. Sertore, P. Michelato, L. Monaco, P. Manini, F. Siviero, Use of non evaporable getter pumps to ensure long term performances of high quantum efficiency photocathodes. J. Vac. Sci. Technol. A 32(3), 031602 (2014). https://doi.org/10.1116/1.4867488
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Pagani, C., Michelato, P., Monaco, L., Sertore, D. (2018). LASA Cs2Te Photocathodes: The Electron Source for XFELs. In: Bortignon, P., Lodato, G., Meroni, E., Paris, M., Perini, L., Vicini, A. (eds) Toward a Science Campus in Milan. CDIP 2017. Springer, Cham. https://doi.org/10.1007/978-3-030-01629-6_24
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DOI: https://doi.org/10.1007/978-3-030-01629-6_24
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