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相关实验视频

Updated: May 29, 2025

An Experimental Protocol for Femtosecond NIR/UV - XUV Pump-Probe Experiments with Free-Electron Lasers

An Experimental Protocol for Femtosecond NIR/UV - XUV Pump-Probe Experiments with Free-Electron Lasers

Published on: October 23, 2018

在SACLA进行探头实验的长期时间稳定.

Tadashi Togashi¹, Shigeki Owada¹, Toshinori Yabuuchi¹

¹Japan Synchrotron Radiation Research Institute (JASRI), Sayo-cho, Sayo-gun 679-5198, Japan.

Journal of synchrotron radiation

|February 3, 2025

概括

一个新的定时控制系统稳定了X射线自由电子激光器 (XFEL) 和光学激光脉冲,在先进的探头实验中,在49小时内将定时动降至50 fs以下.

科学领域:

物理物理学物理
激光技术激光技术激光技术
实验方法实验方法

背景情况:

在探头实验中,X射线自由电子激光器 (XFEL) 和光学激光器之间的精确时间同步至关重要.
长期的时间偏移会显著降低实验数据的质量,并限制可实现的分辨率.

研究的目的:

开发和实施一个强大的计时控制系统,以稳定XFEL和光学激光脉冲之间的时间重叠.
在SPring-8 Ångstrom Compact自由电子LAser (SACLA) 的探头实验中最大限度地减少定时动和漂移.

主要方法:

使用一个循环外平衡的光学微波相位探测器进行精确的计时测量.
实现了一个到达定时监控器来跟踪脉冲到达时间.
采用反控制系统来纠正时间偏差.

主要成果:

在大约49小时内实现了长期定时稳定,震动和漂移低于50 fs (RMS).
在两个实验分支 (BL3) 的同时计时监测中显示出高相关性,在8小时内RMS误差为8.6 fs.

结论:

开发的定时控制系统有效地稳定了XFEL和光学激光脉冲之间的相对定时.

关键词:

一个X射线自由电子激光.时间分辨率探测试验实验时间稳定定时间稳定

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该系统的性能适用于要求高时间精度的探头实验.

这种稳定技术提高了XFEL设施超快速测量的可靠性和准确性.