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TY - CONF AU - Huang, C. AU - Andrews, H.L. AU - Baker, R.C. AU - Fleming, R.L. AU - Kim, D. AU - Kwan, T.J. AU - Pavlenko, V.N. AU - Piryatinski, A. AU - Simakov, E.I. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - Physics of Electron Beam Generation and Dynamics From Diamond Field Emitter Arrays J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - Many applications such as compact accelerators and electron microscopy demand high brightness electron beams with small beam size and low emittance. Electric-field-assisted diamond emitters manufactured from semiconductor processes are strong candidates for cathodes in such sources. The micro-scale pyramid structure of the emitter has the desirable attribute of significant field enhancement at the sharp interfaces (apex and edges) to facilitate electron emission. We use the LSP particle-in-cell code to simulate the diamond emitter in a diode setup and obtain the beam size and divergence. An empirical fit of the fields around the apex is extracted for detail study. The trend of the beam divergence observed in the simulation is further corroborated using electron’s trajectory in the empirical field model. PB - JACoW Publishing CP - Geneva, Switzerland SP - 2137 EP - 2139 KW - electron KW - simulation KW - cathode KW - ECR KW - experiment DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-TUPTS091 UR - http://jacow.org/ipac2019/papers/tupts091.pdf ER -