Electron Trajectory in an Undulator with Dipole Field and BPM Errors | Zendy

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Electron Trajectory in an Undulator with Dipole Field and BPM Errors

Author(s) -

P. Emma

Publication year - 2005

Publication title -

osti oai (u.s. department of energy office of scientific and technical information)

Language(s) - English

Resource type - Reports

DOI - 10.2172/839700

Subject(s) - undulator , trajectory , physics , dipole , planar , position (finance) , field (mathematics) , electron , optics , computational physics , beam (structure) , computer science , nuclear physics , mathematics , quantum mechanics , economics , pure mathematics , computer graphics (images) , finance

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 requirements on electron trajectory straightness are very demanding.

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