First-, second-, and third-order achromatic bend systems for free-electron laser applications

The authors evaluated and compared several achromatic bend systems for the application of transporting a spent electron beam exiting the wiggler of a free-electron laser (FEL). For high-power, efficient FELs, the design of a postwiggler electron-beam transport system is challenging because of the la...

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Bibliographic Details
Main Authors: Rusthoi, D.P., Wadlinger, E.A.
Format: Conference Proceeding
Language:English
Subjects:
Electron optics
Free electron lasers
Laboratories
Laser applications
Laser beams
Particle beam optics
Particle beams
Space charge
Taylor series
Undulators
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Summary:The authors evaluated and compared several achromatic bend systems for the application of transporting a spent electron beam exiting the wiggler of a free-electron laser (FEL). For high-power, efficient FELs, the design of a postwiggler electron-beam transport system is challenging because of the large double-peaked momentum distribution caused by the laser. The optics systems had to be able to handle electron-beam power arbitrarily distributed between the two momentum peaks. This system included not only the achromatic bend but also the final transport that involved a beam distribution or rastering system targetting a beamstop. The salient features of 11 achromatic bend systems and the characteristics by which to choose one system over another are discussed.< >
DOI:10.1109/PAC.1991.164378