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TY - CONF AU - Halavanau, A. AU - Edstrom, D.R. AU - Gai, W. AU - Ha, G. AU - Piot, P. AU - Power, J.G. AU - Qiang, G. AU - Ruan, J. AU - Santucci, J.K. AU - Wisniewski, E.E. ED - Petit-Jean-Genaz, Christine ED - Kim, Dong Eon ED - Kim, Kyung Sook ED - Ko, In Soo ED - Schaa, Volker RW TI - Generation of Homogeneous and Patterned Electron Beams using a Microlens Array Laser-Shaping Technique J2 - Proc. of IPAC2016, Busan, Korea, May 8-13, 2016 C1 - Busan, Korea T2 - International Particle Accelerator Conference T3 - 7 LA - english AB - In photocathodes the achievable electron-beam parameters are controlled by the laser used to trigger the photoemission process. Non-ideal laser distribution hampers the final beam quality. Laser inhomogeneities, for instance, can be "amplified" by space-charge force and result in fragmented electron beams. To overcome this limitation laser shaping methods are routinely employed. In the present paper we demonstrate the use of simple microlens arrays to dramatically improve the transverse uniformity. We also show that this arrangement can be used to produce transversely-patterned electron beams. Our experiments are carried out at the Argonne Wakefield Accelerator facility. PB - JACoW CP - Geneva, Switzerland SP - 3983 EP - 3986 KW - laser KW - electron KW - emittance KW - solenoid KW - experiment DA - 2016/06 PY - 2016 SN - 978-3-95450-147-2 DO - 10.18429/JACoW-IPAC2016-THPOW021 UR - http://jacow.org/ipac2016/papers/thpow021.pdf ER -