Jitter-correction for IR/UV-XUV pump-probe experiments at the FLASH free-electron laser
Jitter-correction for IR/UV-XUV pump-probe experiments at the FLASH free-electron laser
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DOI：
10.1088/1367-2630/aa652d
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发表时间：
2017-04-01
影响因子：
3.3
通讯作者：
Rolles, Daniel
中科院分区：
文献类型：
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作者：
Savelyev, Evgeny;Boll, Rebecca;Rolles, Daniel
在泵浦-探测实验中，采用自由电子激光器（FEL）结合同步光学飞秒激光器，FEL脉冲和光学激光脉冲之间的到达时间抖动通常严重限制可以实现的时间分辨率。在这里，我们提出了一个泵浦探测实验的紫外光诱导解离的2，6-二氟碘苯（C6 H3 F2 I）分子进行的FLASH自由电子激光，利用最近升级的FLASH定时和同步系统，以获得高质量的数据，不受限制的自由电子激光到达时间抖动。我们详细讨论了必要的数据分析步骤，并描述了我们在实验中观察到的碎片离子的产率和动能的时间依赖性效应的起源。
In pump-probe experiments employing a free-electron laser (FEL) in combination with a synchronized optical femtosecond laser, the arrival-time jitter between the FEL pulse and the optical laser pulse often severely limits the temporal resolution that can be achieved. Here, we present a pump-probe experiment on the UV-induced dissociation of 2,6-difluoroiodobenzene (C6H3F2I) molecules performed at the FLASH FEL that takes advantage of recent upgrades of the FLASH timing and synchronization system to obtain high-quality data that are not limited by the FEL arrival-time jitter. Wediscuss in detail the necessary data analysis steps and describe the origin of the timedependent effects in the yields and kinetic energies of the fragment ions that we observe in the experiment.