Wave optical description of the Traveling-Wave Thomson-Scattering optical undulator field and its application to the TWTS-FEL
Wave optical description of the Traveling-Wave Thomson-Scattering optical undulator field and its application to the TWTS-FEL
Steiniger, K.; Widera, R.; Pausch, R.; Debus, A.; Bussmann, M.; Schramm, U.
We show that X-ray optical free-electron lasers (OFELs) can be realized using Traveling-Wave Thomson-Scattering (TWTS).
In TWTS pulse front tilted laser pulses are scattered off relativistic electron bunches in a side-scattering geometry.
The pulse-front tilt guarantees overlap between laser and electrons over distances in the meter range while both are traveling in different directions.
An interaction distance of 90 cm is obtained in a setup were 590 MeV electrons scatter off a petawatt class laser incident under an angle of 4.5°.
The amplification of the 1.5 Å radiation saturates at the end of the interaction.
In order to account for spatial and temporal dispersion introduced with the pulse front tilt, we develop an exact three-dimensional analytical description of TWTS pulses that can be used in three-dimensional simulations of the radiation amplification process.
The wave-optical formulation of the TWTS pulse includes dispersion to all orders and provides a general description of laser pulses diffracted at VLS gratings.
Keywords: traveling-wave; thomson scattering; optical FEL; VLS grating
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Contribution to proceedings
1st European Advanced Accelerator Concepts, 02.-06.06.2013, La Biodola, Isola d'Elba, Italy
Proceedings of the 1st European Advanced Accelerator Concepts, Amsterdam: Elsevier, 147-152
DOI: 10.1016/j.nima.2013.10.091
Cited 7 times in Scopus -
Nuclear Instruments and Methods in Physics Research A 740(2014), 147-152
Online First (2013) DOI: 10.1016/j.nima.2013.10.091
Cited 7 times in Scopus
Permalink: https://www.hzdr.de/publications/Publ-19161