Characterization of soft X-ray FEL pulse duration with two-color photoelectron spectroscopy
Characterization of soft X-ray FEL pulse duration with two-color photoelectron spectroscopy
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用双色光电子能谱表征软 X 射线 FEL 脉冲持续时间
DOI：
10.1107/s1600577520008516
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发表时间：
2020
影响因子：
2.5
通讯作者：
Yabashi Makina
中科院分区：
文献类型：
--
作者：
Owada Shigeki;Fushitani Mizuho;Matsuda Akitaka;Fujise Hikaru;Sasaki Yuuma;Hikosaka Yasumasa;Hishikawa Akiyoshi;Yabashi Makina
用光电子边带测量方法研究了SACLA BL 1（0.5- 0.8MeV，0.2- 0.3nC/束团）软X射线自由电子激光（FEL）脉冲宽度。 使用到达时间监测器测量由近红外飞秒激光产生的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。从由此导出的互相关迹线的宽度，在40eV和120 eV之间的光子能量范围内，FEL脉冲持续时间被评估为28 ± 5 fs半峰全宽。
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.