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TY - CONF AU - Dimitrov, D.A. AU - Ben-Zvi, I. AU - Cary, J.R. AU - Rao, T. AU - Smedley, J. AU - Smithe, D.N. AU - Wang, E. AU - Zhou, C.D. ED - Henderson, Stuart ED - Akers, Evelyn ED - Satogata, Todd ED - Schaa, Volker R.W. TI - Modeling Electron Emission and Surface Effects from Diamond Cathodes J2 - Proc. of IPAC2015, Richmond, VA, USA, May 3-8, 2015 C1 - Richmond, VA, USA T2 - International Particle Accelerator Conference T3 - 6 LA - english AB - We developed modeling capabilities, within the Vorpal particle-in-cell code, for three-dimensional (3D) simulations of surface effects and electron emission from semiconductor photocathodes. They include calculation of emission probabilities using general, piece-wise continuous, space-time dependent surface potentials, effective mass and band bending field effects. We applied these models, in combination with previously implemented capabilities for modeling charge generation and transport in diamond, to investigate the emission dependence on applied electric field in the range from approximately 2 to 17 MV/m along the [100] direction. The simulation results were compared to experimental data when using different emission models, band bending effects, and surface-dependent electron affinity. Simulations using surface patches with different levels of hydrogenation lead to the closest agreement with the experimental data. PB - JACoW CP - Geneva, Switzerland SP - 620 EP - 622 KW - electron KW - simulation KW - cathode KW - vacuum KW - scattering DA - 2015/06 PY - 2015 SN - 978-3-95450-168-7 DO - 10.18429/JACoW-IPAC2015-MOPMA033 UR - http://jacow.org/ipac2015/papers/mopma033.pdf ER -