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Proceedings Paper

Simple generation of two-color FEL pulses using a sextupole magnet
Author(s): Philipp Dijkstal; Sven Reiche; Eduard Prat
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Paper Abstract

We present a new and simple method to generate two-color free-electron laser (FEL) pulses. In our scheme an electron bunch is quadratically tilted in the transverse direction and exhibits an energy chirp. The head and tail of the bunch are aligned to the undulator beamline and will lase, while the middle part of the bunch undergoes orbit oscillations and thus is unable to amplify the FEL radiation. Since the beam is energy chirped, the central wavelengths of the SASE amplification at the two aligned parts of the bunch are different. The beam tilt is introduced by a variation of sextupole strength in a bunch compressor section. We present simulation results of this new method for the hard X-ray FEL beamline Aramis at SwissFEL. This includes the general performance and tunability of the scheme, the requirements on the energy chirp and tilt generation, and adverse effects associated with the beam tilt.

Paper Details

Date Published: 24 April 2019
PDF: 10 pages
Proc. SPIE 11038, X-Ray Free-Electron Lasers: Advances in Source Development and Instrumentation V, 110380X (24 April 2019); doi: 10.1117/12.2524104
Show Author Affiliations
Philipp Dijkstal, Paul Scherrer Institut (Switzerland)
Sven Reiche, Paul Scherrer Institut (Switzerland)
Eduard Prat, Paul Scherrer Institut (Switzerland)

Published in SPIE Proceedings Vol. 11038:
X-Ray Free-Electron Lasers: Advances in Source Development and Instrumentation V
Thomas Tschentscher; Luc Patthey; Kai Tiedtke; Marco Zangrando, Editor(s)

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