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TY - CONF AU - Seletskiy, S. AU - Blaskiewicz, M. AU - Fedotov, A.V. AU - Kayran, D. AU - Kewisch, J. AU - Minty, M.G. AU - Sheehy, B. AU - Zhao, Z. ED - Schaa, Volker RW ED - Arduini, Gianluigi ED - Pranke, Juliana ED - Seidel, Mike ED - Lindroos, Mats TI - Dependence of LEReC Beam Energy Spread on Photocathode Laser Modulation J2 - Proc. of IPAC2017, Copenhagen, Denmark, 14â19 May, 2017 C1 - Copenhagen, Denmark T2 - International Particle Accelerator Conference T3 - 8 LA - english AB - Present requirements to the photocathode DC gun of the low energy RHIC electron cooling (LEReC) project is to produce 100 ps long bunch of electrons with 130 pC charge. The laser pulse of required length will be produced with the stacking of multiple few picosecond long sub-pulses. Depending on the choice of the laser sub-pulse length and on the relative delay between these sub-pulses one can obtain laser pulse with various longitudinal intensity modulations. The longitudinal modulation of laser intensity creates longitudinal modulation of electron bunch charge. Such modulation is known to cause the growth of e-beam uncorrelated energy spread in photoinjectors - the effect we would like to avoid. In this paper we estimate growth of e-beam energy spread due to its initial density modulation and set requirements to the maximum allowable depth of longitudinal modulation of photocathode laser intensity. PB - JACoW CP - Geneva, Switzerland SP - 1669 EP - 1671 KW - laser KW - electron KW - space-charge KW - impedance KW - flattop DA - 2017/05 PY - 2017 SN - 978-3-95450-182-3 DO - 10.18429/JACoW-IPAC2017-TUPAB143 UR - http://jacow.org/ipac2017/papers/tupab143.pdf ER -