Evaluation and Optimization of Bunch Compressor for APS LEUTL

Talk given to APS/SLAC/LANL video conference, July 1, 1999

Michael Borland, APS

Text slides - PDF

Plots of test case using the parameters of Saldin, et. al., (On the coherent radiation of an electron bunch moving in an arc of a circle, NIM A 398 (1997) 373-394) showing transition from transient to steady-state CSR. Note that the dipole is longer than that used in Saldin, et. al. The graphs show the linear density, its derivative, and the CSR wake as a function of position in the dipole. - color postscript

Plots of linear density and wake in the last bend of a symmetric 4-magnet chicane. Parameters of chicane and beam per P. Emma, V. Bharadwaj, Bunch Compressor Options for the LEUTL Facility at the APS - color postscript

Same as last item, except for asymmetric 4-magnet design of Emma and Bharadwaj. - color postscript

Plots of CSR wake for symmetric and asymmetric designs together. - color postscript

Plots of linear density for symmetric and asymmetric designs together. - color postscript

Plots of selected beam correlations for the symmetric and asymmetric designs together. - color postscript

Details for the symmetric chicane simulation. - plots of beam parameters vs s (color postscript) - phase space plots and histograms (color postscript)

Details for the asymmetric chicane simulation. - plots of beam parameters vs s (color postscript) - phase space plots and histograms (color postscript)

Optimization of FEL performance by adjusting linac phases and positions of two scrapers in the high-dispersion point of the symmetric chicane design. The FEL computations are imbedded in elegant and are based on the parameterization of Ming Xie (Free Electron Laser Driven by SLAC Linac). - plots of beam, FEL, and accelerator parameters vs optimization step number (color postscript) - plots of final beam parameters vs s (color postscript) - final phase space plots and histograms (color postscript)

Modified 7/1/1999 by borland@aps.anl.gov