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Journal Article

Pulse Splitting in Short Wavelength Seeded Free Electron Lasers

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Citation

Labat, M., Joly, N., Bielawski, S., Szwaj, C., Bruni, C., & Couprie, M. E. (2009). Pulse Splitting in Short Wavelength Seeded Free Electron Lasers. Physical Review Letters, 103: 264801. doi:10.1103/PhysRevLett.103.264801.


Cite as: https://hdl.handle.net/21.11116/0000-000F-C35D-D
Abstract
We investigate a fundamental limitation occurring in vacuum ultraviolet and extreme ultraviolet seeded free electron lasers (FELs). For a given electron beam and undulator configuration, an increase of the FEL output energy at saturation can be obtained via an increase of the seed pulse duration. We put in evidence a complex spatiotemporal deformation of the amplified pulse, leading ultimately to a pulse splitting effect. Numerical studies of the Colson–Bonifacio FEL equations reveal that slippage length and seed laser pulse wings are core ingredients of the dynamics.