X-ray laser seeding for short pulses and narrow bandwidth

William Graves, M. Farkhondeh, F. X. Kaertner, R. Milner, C. Tschalaer, J. B. Van Der Laan, F. Wang, A. Zolfaghari, T. Zwart, W. M. Fawley, D. E. Moncton

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Scopus citations


The performance of an x-ray free electron laser can be substantially enhanced if a coherent seed source is used to provide sufficient initial power that it dominates the spontaneous emission in the early part of the undulator. The FEL output then becomes an amplified reproduction of the input seed having, under certain conditions, the same pulse length and bandwidth. For studies of molecular and atomic time dynamics the pulse length may be very short, reaching below 1 fs with a transform limited bandwidth of a few tenths of a percent. For spectroscopy and diffraction experiments the beam may alternatively be made monochromatic at the level of one part in 10 5 or better, with a pulse length of tens of femtoseconds. Simulation studies of seeded FEL performance at 0.3 nm using the code GINGER are presented.

Original languageEnglish (US)
Title of host publicationProceedings of the IEEE Particle Accelerator Conference
EditorsJ. Chew, P. Lucas, S. Webber
Number of pages3
StatePublished - 2003
Externally publishedYes
EventPAC 2003 - Proceedings of the 2003 IEEE Particle Accelerator Conference - Portland, OR, United States
Duration: May 12 2003May 16 2003


OtherPAC 2003 - Proceedings of the 2003 IEEE Particle Accelerator Conference
Country/TerritoryUnited States
CityPortland, OR

ASJC Scopus subject areas

  • General Engineering


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