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TY - CONF AU - Polozov, S.M. AU - Krasilnikov, M. AU - Rashchikov, V.I. ED - Liu, Lin ED - Byrd, John M. ED - Neuenschwander, Regis T. ED - Picoreti, Renan ED - Schaa, Volker R. W. TI - An Improved Model for Photoemission of Space Charge Dominated Picosecond Electron Bunches: Theory and Experiment J2 - Proc. of IPAC2021, Campinas, SP, Brazil, 24-28 May 2021 CY - Campinas, SP, Brazil T2 - International Particle Accelerator Conference T3 - 12 LA - english AB - The emission of a short highly charged electron bunch in a radiofrequency photogun is discussed. The traditional space charge limited emission numerical model is extended by an introduction of positively charged ions arising in the cathode region and dynamically changing during the emission. Estimates on the time characteristics of the charge migrating process in the semiconductor region are given. The numerical results are compared with the results of other numerical models and with experimental observations at the Photo Injector Test facility at DESY in Zeuthen (PITZ). PB - JACoW Publishing CP - Geneva, Switzerland SP - 2829 EP - 2832 KW - cathode KW - electron KW - experiment KW - laser KW - space-charge DA - 2021/08 PY - 2021 SN - 2673-5490 SN - 978-3-95450-214-1 DO - doi:10.18429/JACoW-IPAC2021-WEPAB101 UR - https://jacow.org/ipac2021/papers/wepab101.pdf ER -