超快X射线脉冲测量方法
Ultrafast X-ray pulse measurement method
摘要：
在本文中，我们描述了一种测量技术，能够解决飞秒X射线脉冲从XFEL设备。由于这些超短脉冲本身是最短的事件，我们的测量策略是让X射线脉冲本身采样。我们的方法依赖于应用程序的“新鲜”聚束技术，它允许种子X射线脉冲与种子和电子聚束之间的可变延迟的生产。记录每个脉冲的发射到发射平均能量。事实证明，人们实际上测量了X射线脉冲的自相关函数，该自相关函数以简单的方式与实际脉冲宽度相关。对于所提出的技术的实施，用短磁弯道代替单个波荡器段是足够的。波荡器的聚焦系统保持不变，并且安装不会干扰基线操作模式。我们提出了一个可行性研究，我们与典型的X射线自由电子激光参数的例子。
英文摘要：
In this paper we describe a measurement technique capable of resolving femtosecond X-ray pulses from XFEL facilities. Since these ultrashort pulses are themselves the shortest event available, our measurement strategy is to let the X-ray pulse sample itself. Our method relies on the application of a "fresh" bunch technique, which allows for the production of a seeded X-ray pulse with a variable delay between seed and electron bunch. The shot-to-shot averaged energy per pulse is recorded. It turns out that one actually measures the autocorrelation function of the X-ray pulse, which is related in a simple way to the actual pulse width. For implementation of the proposed technique, it is sufficient to substitute a single undulator segment with a short magnetic chicane. The focusing system of the undulator remains untouched, and the installation does not perturb the baseline mode of operation. We present a feasibility study and we make exemplifications with typical parameters of an X-ray FEL.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
