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TY - UNPB AU - McAteer, M. ED - Ramberger, Suitbert ED - Draper, Mick ED - Schaa, Volker RW TI - Dark Current and Halo Tracking in ERLs J2 - Proc. of ERL2017, Geneva, Switzerland, June 18-23, 2017 C1 - Geneva, Switzerland T2 - ICFA Advanced Beam Dynamics Workshop T3 - 59 LA - english AB - Particles that are far from the core of a bunch are often lost in an uncontrolled way within an accelerator, and in high-current machines beam loss can quickly damage accelerator components or cause significant residual activation. We give a brief overview of the common sources of unwanted beam, including halo generated by nonlinear dynamics, dark current from field emission in the cavities, out-of-time scattered laser light on the cathode, and incompletely blocked laser pulses. The results of tracking simulations to model these effects in BERLinPro are discussed. PB - JACoW Publishing CP - Geneva, Switzerland ER -