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Wigner distribution of self-amplified spontaneous emission free-electron laser pulses and extracting its autocorrelation
- Source :
- Journal of synchrotron radiation 28(1), 3-17 (2021). doi:10.1107/S160057752001382X, Journal of Synchrotron Radiation
- Publication Year :
- 2021
- Publisher :
- Wiley-Blackwell, 2021.
-
Abstract
- Journal of synchrotron radiation 28(1), 3 - 17 (2021). doi:10.1107/S160057752001382X<br />The emerging concept of `beam by design' in free-electron laser (FEL) accelerator physics aims for accurate manipulation of the electron beam to tailor spectral and temporal properties of the radiation for specific experimental purposes, such as X-ray pump/X-ray probe and multiple wavelength experiments. `Beam by design' requires fast, efficient, and detailed feedback on the spectral and temporal properties of the generated X-ray radiation. Here a simple and cost-efficient method to extract information on the longitudinal Wigner distribution function of emitted FEL pulses is proposed. The method requires only an ensemble of measured FEL spectra and is rather robust with respect to accelerator fluctuations. The method is applied to both the simulated SASE spectra with known radiation properties as well as to the SASE spectra measured at the European XFEL revealing underlying non-linear chirp of the generated radiation. In the Appendices an intuitive understanding of time���frequency representations of chirped SASE radiation is provided.<br />Published by Wiley-Blackwell, [S.l.]
- Subjects :
- Nuclear and High Energy Physics
Self-amplified spontaneous emission
Wigner
Radiation
01 natural sciences
Radiation properties
law.invention
SASE
Optics
spectrogram
law
0103 physical sciences
Chirp
ddc:550
Wigner distribution function
010306 general physics
Instrumentation
FEL
Accelerator physics
Physics
010308 nuclear & particles physics
business.industry
Free-electron laser
duration
Laser
Research Papers
Physics::Accelerator Physics
business
Subjects
Details
- Language :
- English
- ISSN :
- 16005775
- Database :
- OpenAIRE
- Journal :
- Journal of synchrotron radiation 28(1), 3-17 (2021). doi:10.1107/S160057752001382X, Journal of Synchrotron Radiation
- Accession number :
- edsair.doi.dedup.....1aab2f7c4416360536446942e9acc145