FELSI Meeting 15 April 2008

Tuesday 15 Apr 2008, 14:00 → 15:10 Europe/Zurich

WBGB 020 (PSI)

14:00 → 14:30 Rasmus Ischebeck: Optimization of accelerator parameters with genetic algorithms

General comments: (i) method is potentially very attractive, because it can model specific hardware limitations, e.g. magnet settings etc.; (ii) the method can easily integrate measured data, as shown In the presentation. BO: comments on formulation of fitness function, in the world of genetic algorithms, increasing fitness is the inverse of the error and means better meeting the objective of the optimization; if the fitness function selected in the presentation is inverted, then it directly corresponds to the usual fitness formulation. 14:30 Yujong Kim: Simulation results on a backup injector with CTF3 gun type V

Slides RIGA.pdf

14:30 → 14:50 Yujong Kim: Simulation results on a backup injector with CTF3 gun type V

FLP: question regarding the criterion for slice selection and comment regarding legend on plots of sliced emittance YK: 20 slices and 100'000 particles were used in the calculations.

Slides psi_xfel06_final.pdf

14:50 → 15:10 AOB

FS: A need has been identified for 3-dimensional CSR simulations of the bunch compressor. The code CSRTrack has limited capabilities and might not be applicable for the parameters of the PSI XFEL; the code TraFiC4 is unreliable and unstable. CK: his CSR code will not be available on a short-term basis. FS will be happy to support 3D CSR calculations.