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Puffin : a three dimensional, unaveraged free electron laser simulation code

Campbell, Lawrence and McNeil, Brian (2012) Puffin : a three dimensional, unaveraged free electron laser simulation code. Physics of Plasmas, 19. ISSN 1070-664X

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Abstract

An unaveraged 3D model of the free electron laser (FEL) is presented which is capable of modelling electron interactions with broad bandwidth radiation that includes electron beam shot-noise and coherent spontaneous emission effects. Non-localised electron transport throughout the beam is modelled self-consistently allowing better modelling of systems where a larger electron energy range is required. The FEL interaction can be modelled with undulator fields of variable polarisation. A modular undulator system allows insertion of other magnetic structures, such as chicanes. A set of working equations that describe the model are derived, the parallel numerical method that solves them described, and some example FEL interactions presented.