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Single-shot spectrometry for x-ray free-electron lasers
Makina Yabashi1, Jerome B Hastings, Max S Zolotorev
1SPring-8/JASRI, Kouto 1-1-1, Sayo, Hyogo 679-5198, Japan. yabashi@spring8.or.jp
A new single-shot spectrometer using a mirror and crystal measures X-ray Free-Electron Laser (XFEL) pulse widths from sub-femtoseconds to picoseconds with high resolution.
Area of Science:
- Physics
- Optics
- Spectroscopy
Background:
- X-ray Free-Electron Lasers (XFELs) are powerful tools for scientific research.
- Accurate diagnostics of XFEL properties, such as pulse width, are crucial for experiments.
Purpose of the Study:
- To present an experimental scheme for single-shot spectrometry for XFEL diagnostics.
- To develop a high-precision spectrometer for measuring XFEL pulse widths.
Main Methods:
- Utilized an ultraprecisely figured mirror and a perfect crystal to create a simple spectrometer.
- Investigated the application of this spectrometer for determining XFEL pulse widths theoretically and experimentally.
Main Results:
- The developed spectrometer covers an energy range from a few eV to a hundred eV with high resolution.
- Successfully determined XFEL pulse widths from sub-femtosecond (fs) to picosecond (ps) in a single shot, even for spontaneous radiation.
Conclusions:
- The presented single-shot spectrometry scheme offers a simple and high-precision method for XFEL diagnostics.
- The system is capable of measuring ultrashort XFEL pulses and can be extended for even shorter pulse measurements.
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