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TY - CONF AU - Purwar, H. AU - Bruni, C. AU - Chaumat, V. AU - ElKamchi, N. AU - Garzella, D. AU - Lucas, B. AU - Pittman, M. AU - Soskov, V. AU - Vinatier, T. ED - Schaa, Volker RW ED - Arduini, Gianluigi ED - Pranke, Juliana ED - Seidel, Mike ED - Lindroos, Mats TI - Experimental Results for Multiphoton Nonlinear Photoemission Processes on Phil Test Line J2 - Proc. of IPAC2017, Copenhagen, Denmark, 14â19 May, 2017 C1 - Copenhagen, Denmark T2 - International Particle Accelerator Conference T3 - 8 LA - english AB - One of the prerequisites for the next generation high luminosity light sources is the availability of the short electron bunches. It also has several applications in other domains, including medical diagnostics and high-resolution imaging. In principle, using photoelectric effect a short electron bunch can initially be generated by illuminating a photocathode with an ultra-short light pulse of appropriate wavelength. Strong EM fields from a RF gun or similar accelerating structures, synchronized with the incoming laser pulses, are then used to accelerate these electron bunches initially up to an energy of tens of MeV. We present our preliminary results on the experimental investigation of two-photon nonlinear photoemission processes for the generation of picosecond, low-charge electron bunches conducted at PHIL photoinjector facility. A comparison of the emission efficiency and bunch characteristics with the single photon emission process is also made. PB - JACoW CP - Geneva, Switzerland SP - 1369 EP - 1371 KW - laser KW - photon KW - electron KW - gun KW - cathode DA - 2017/05 PY - 2017 SN - 978-3-95450-182-3 DO - 10.18429/JACoW-IPAC2017-TUPAB025 UR - http://jacow.org/ipac2017/papers/tupab025.pdf ER -