FLASH free-electron laser single-shot temporal diagnostic: terahertz-field-driven streaking.
FLASH free-electron laser single-shot temporal diagnostic: terahertz-field-driven streaking.
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DOI：
10.1107/s160057751701253x
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发表时间：
2018-01-01
影响因子：
2.5
通讯作者：
Düsterer S
中科院分区：
文献类型：
--
作者：
Ivanov R;Liu J;Brenner G;Brachmanski M;Düsterer S
报道了一种基于太赫兹条纹的FLASH脉冲长度诊断装置的安装和调试。调试的太赫兹场驱动的条纹相机安装在自由电子激光（FEL）FLASH在德国汉堡DESY，能够提供光子脉冲宽度以及到达时间的信息与分辨率为10 fs的每个单一的XUV自由电子激光脉冲，报告。 对于不同的FLASH FEL设置，测量了300 fs和<15 fs之间的脉冲持续时间。 在FLASH直线加速器部分测量的XUV脉冲到达时间和自由电子激光电子束到达时间之间的比较显示出20 fs r.m.s.的相关宽度， 从而展示了FLASH优异的运行稳定性。此外，太赫兹条纹设置同时操作的另一种方法来确定自由电子激光脉冲宽度的基础上的光谱分析。通过简单的频谱分析得到的脉冲宽度与太赫兹条纹测量得到的脉冲宽度吻合较好。
The installation and commissioning of a pulse length diagnostic setup at FLASH based on terahertz streaking is reported. The commissioning of a terahertz-field-driven streak camera installed at the free-electron laser (FEL) FLASH at DESY in Hamburg, being able to deliver photon pulse duration as well as arrival time information with ∼10 fs resolution for each single XUV FEL pulse, is reported. Pulse durations between 300 fs and <15 fs have been measured for different FLASH FEL settings. A comparison between the XUV pulse arrival time and the FEL electron bunch arrival time measured at the FLASH linac section exhibits a correlation width of 20 fs r.m.s., thus demonstrating the excellent operation stability of FLASH. In addition, the terahertz-streaking setup was operated simultaneously to an alternative method to determine the FEL pulse duration based on spectral analysis. FLASH pulse duration derived from simple spectral analysis is in good agreement with that from terahertz-streaking measurement.