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Characterization of soft X-ray FEL pulse duration with two-color photoelectron spectroscopy.
Journal of Synchrotron Radiation ( IF 2.4 ) Pub Date : 2020-08-06 , DOI: 10.1107/s1600577520008516 Shigeki Owada 1 , Mizuho Fushitani 2 , Akitaka Matsuda 2 , Hikaru Fujise 2 , Yuuma Sasaki 2 , Yasumasa Hikosaka 2 , Akiyoshi Hishikawa 2 , Makina Yabashi 1
Journal of Synchrotron Radiation ( IF 2.4 ) Pub Date : 2020-08-06 , DOI: 10.1107/s1600577520008516 Shigeki Owada 1 , Mizuho Fushitani 2 , Akitaka Matsuda 2 , Hikaru Fujise 2 , Yuuma Sasaki 2 , Yasumasa Hikosaka 2 , Akiyoshi Hishikawa 2 , Makina Yabashi 1
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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−1 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.
中文翻译：
用双色光电子能谱表征软X射线FEL脉冲持续时间。
SACLA BL1的软X射线自由电子激光（FEL）脉冲的脉冲持续时间（每束0.2-0.3 nC，0.5-0.8 MeV）通过光电子边带测量来表征。使用到达时间监视器，测量了由近红外飞秒激光器产生的He 1 s -1光电子边带的强度，作为两个脉冲之间的时间延迟的函数。根据由此得出的互相关迹线的宽度，在40 eV至120 eV的光子能量范围内，FEL脉冲持续时间在半峰最大时的全宽评估为28±5 fs。
更新日期：2020-08-06
中文翻译：
用双色光电子能谱表征软X射线FEL脉冲持续时间。
SACLA BL1的软X射线自由电子激光（FEL）脉冲的脉冲持续时间（每束0.2-0.3 nC，0.5-0.8 MeV）通过光电子边带测量来表征。使用到达时间监视器，测量了由近红外飞秒激光器产生的He 1 s -1光电子边带的强度，作为两个脉冲之间的时间延迟的函数。根据由此得出的互相关迹线的宽度，在40 eV至120 eV的光子能量范围内，FEL脉冲持续时间在半峰最大时的全宽评估为28±5 fs。
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