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- W2133918871 abstract "Abstract Artificial collisions during particle tracking with self-consistent space charge lead to diffusion-like, numerical effects. The artificial collisions generate a stochastic noise spectrum. As a consequence the entropy and the emittance can grow along periodic focusing structures. The growth rates depend on the number of simulation macro-particles and on the space charge tune shifts. In our study we present analytical predictions for the numerical friction and diffusion in 2D simulations. For simple focusing structures we derive a relation between the friction coefficient and the entropy growth. The scaling of the friction coefficient with the macro-particle number and the space charge tune shift is obtained from 2D simulations and compared to the analytic predictions." @default.
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- W2133918871 date "2015-01-01" @default.
- W2133918871 modified "2023-10-14" @default.
- W2133918871 title "Artificial collisions, entropy and emittance growth in computer simulations of intense beams" @default.
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- W2133918871 doi "https://doi.org/10.1016/j.nima.2014.10.004" @default.
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