Electron Trajectory in an Undulator with Dipole Field and BPM Errors [report]

P Emma
2005 unpublished
A statistical analysis of a corrected electron trajectory through a planar undulator is presented. The undulator is composed of multiple modular sections each containing N dipoles with random field strength errors and misaligned beam position monitors (BPMs) between each section. An analytical formula for the rms trajectory is derived to aid in the understanding of the impacts of BPM location and alignment on the trajectory. The results are applied to the LCLS FEL undulator where the
more » ... here the requirements on electron trajectory straightness are very demanding.
doi:10.2172/839700 fatcat:lb4s74uh5vhhxmgyzy5z2pihgy