利用自由电子激光器中的非线性束团压缩产生单尖峰硬X射线脉冲
Generating Single-Spike Hard X-Ray Pulses with Nonlinear Bunch Compression in Free-Electron Lasers.
作者信息
Huang S, Ding Y, Feng Y, Hemsing E, Huang Z, Krzywinski J, Lutman A A, Marinelli A, Maxwell T J, Zhu D
机构信息
Institute of Heavy Ion Physics, School of Physics, Peking University, Beijing 100871, China.
SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA.
出版信息
Phys Rev Lett. 2017 Oct 13;119(15):154801. doi: 10.1103/PhysRevLett.119.154801. Epub 2017 Oct 10.
A simple method for generating single-spike hard x-ray pulses in free-electron lasers (FELs) has been developed at the Linac Coherent Light Source (LCLS). This is realized by nonlinear bunch compression using 20-pC bunch charge, demonstrated in the hard x-ray regime at 5.6 and 9 keV, respectively. Measurements show about half of the FEL shots containing a single-spike spectrum. At 5.6-keV photon energy, the single-spike shots have a mean pulse energy of about 10 μJ with 70% intensity fluctuation and the pulse full width at half maximum is evaluated to be at 200-as level.
直线加速器相干光源（LCLS）已开发出一种在自由电子激光（FEL）中产生单尖峰硬X射线脉冲的简单方法。这是通过使用20皮库束流电荷的非线性束团压缩实现的，分别在5.6千电子伏和9千电子伏的硬X射线区域得到了验证。测量结果表明，约一半的自由电子激光脉冲包含单尖峰光谱。在5.6千电子伏光子能量下，单尖峰脉冲的平均脉冲能量约为10微焦，强度波动为70%，脉冲半高宽估计在200阿秒水平。
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