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- F. Hamme, U. Becker, P. Hammes
CST, Darmstadt
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In accelerator physics and high power vacuum electronics the secondary electron emission (SEE) has in many cases an important influence on the physical behavior of the device. Since its analytical prediction even for simple geometries is extremely cumbersome, numerical simulation is essential to get a better understanding of the possible effects and ideas to change the design. The current paper introduces the implementation of SEE within the code CST Particle Studio (TM), which is an easy to use three dimensional tool for the simulation of electromagnetic fields and charged particles. There are three basic types of secondary electrons, the elastic reflected, the rediffused and the true secondary ones. The implemented SEE model is based on a probabilistic, mathematically self-consistent model developed by Furman and includes the three kinds of secondary electrons mentioned above. The paper presents simulation results with focus to the SEE for the absorbed power within an electron collector of a high power tube. As second example the secondary emission process is studied within the superconducting TESLA cavity, which gives some hints for the understanding of multipactor effects in those cavity and filter structures.
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Slides
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