论文标题
连贯的X射线与可调时间依赖性极化
Coherent X-rays with Tunable Time-Dependent Polarization
论文作者
论文摘要
我们描述了一种从自由电子激光器产生高功率，连贯的X射线脉冲的方法，该激光器具有飞秒量表的周期性时间调节。这种方法依赖于通过调节种子强度或束电流来自种后的时间强度调制的产生。在生成连贯的时间调制$ S $极化脉冲后，电子梁延迟了一半的调制周期，并将其发送到短式正交导向的Undurotator中，并用作$ P $极性化的后燃烧器。我们提供了三种配置的模拟，以实现这种两极分化切换，即增强的自种播种，并通过2种颜色自种子产生的强度调制，增强了当前调制束的自我播种以及当前调制式束的定期自种播种。为后者提供了Linac Cooherent Light Source-II的开始模拟。
We describe a method for producing high power, coherent x-ray pulses from a free electron laser with femtosecond scale periodic temporal modulation of the polarization vector. This approach relies on the generation of a temporal intensity modulation after self seeding either by modulating the seed intensity or the beam current. After generating a coherent temporally modulated $s$-polarization pulse, the electron beam is delayed by half a modulation period and sent into a short orthogonally oriented undulator, serving as a $p$-polarization afterburner. We provide simulations of three configurations for realizing this polarization switching, namely, enhanced self seeding with an intensity modulation generated by 2 color self seeding, enhanced self seeding of a current modulated bunch, and regular self seeding of a current modulated bunch. Start to end simulations for the Linac Coherent Light Source-II are provided for the latter.
