Abstract
The pulse duration of soft X-ray free-electron laser (FEL) pulses of SACLA BL1 (0.2-0.3 nC per bunch, 0.5-0.8 MeV) were characterized by photoelectron sideband measurements. The intensity of the He 1 s photoelectron sidebands generated by a near-infrared femtosecond laser was measured as a function of the time delay between the two pulses using an arrival time monitor. From the width of the cross-correlation trace thus derived, the FEL pulse duration was evaluated to be 28 ± 5 fs full width at half-maximum in the photon energy range between 40 eV and 120 eV.
Original language | English |
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Pages (from-to) | 1362-1365 |
Number of pages | 4 |
Journal | Journal of Synchrotron Radiation |
Volume | 27 |
DOIs | |
State | Published - 2020/09/01 |
Keywords
- cross-correlation
- free-electron lasers
- photoelectron sidebands
ASJC Scopus subject areas
- Radiation
- Nuclear and High Energy Physics
- Instrumentation