用双色光电子能谱表征软X射线自由电子激光脉冲持续时间
Characterization of soft X-ray FEL pulse duration with two-color photoelectron spectroscopy.
作者信息
Owada Shigeki, Fushitani Mizuho, Matsuda Akitaka, Fujise Hikaru, Sasaki Yuuma, Hikosaka Yasumasa, Hishikawa Akiyoshi, Yabashi Makina
机构信息
Japan Synchrotron Radiation Research Institute, 1-1-1 Koto, Sayo-cho, Sayo-gun, Hyogo 679-5198, Japan.
RIKEN SPring-8 Center, 1-1-1 Koto, Sayo-cho, Sayo-gun, Hyogo 679-5148, Japan.
出版信息
J Synchrotron Radiat. 2020 Sep 1;27(Pt 5):1362-1365. doi: 10.1107/S1600577520008516. Epub 2020 Aug 6.
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.
利用光电子边带测量对SACLA BL1的软X射线自由电子激光（FEL）脉冲（每束0.2 - 0.3 nC，0.5 - 0.8 MeV）的脉冲持续时间进行了表征。使用到达时间监测器，测量了由近红外飞秒激光产生的He 1s光电子边带的强度，该强度是两个脉冲之间时间延迟的函数。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脉冲持续时间的半高全宽评估为28±5 fs。
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