论文标题
Attosend-Angstrom自由电子激光器朝向冷束极限
Attosecond-Angstrom free-electron-laser towards the cold beam limit
论文作者
论文摘要
电子束质量对于自由电子激光器（FELS）中的X射线脉冲产生至关重要。最先进的线性加速器（LINACS）可以以足够的质量来提供多gev电子梁，以实现硬X射线式效果，尽管需要km尺寸的设置，而基于等离子的加速器可以在群尺度上产生多GEVEV电子束，并开始触及euv for for Euv fels。我们表明，来自等离子体光导值的电子束比在血浆Wakefield加速器（PWFA）中生成许多比最先进的数量级，然后在没有质量损失的情况下提取，捕获，运输并注射到散发器中。这些Ultrabright，次秒的电子束可以在冷束限制附近驱动硬X-框，以产生Attosecond-Angstrom类的相干X射线脉冲，仅在10米的下驱动器后达到饱和度。这种等离子体-X-FEL为新颖的光子科学能力开辟了途径，例如在自然时间和长度尺度上对电子运动内部的电子运动观察，并朝着更高的光子能量。
Electron beam quality is paramount for X-ray pulse production in free-electron-lasers (FELs). State-of-the-art linear accelerators (linacs) can deliver multi-GeV electron beams with sufficient quality for hard X-ray-FELs, albeit requiring km-scale setups, whereas plasma-based accelerators can produce multi-GeV electron beams on metre-scale distances, and begin to reach beam qualities sufficient for EUV FELs. We show, that electron beams from plasma photocathodes many orders of magnitude brighter than state-of-the-art can be generated in plasma wakefield accelerators (PWFA), and then extracted, captured, transported and injected into undulators without quality loss. These ultrabright, sub-femtosecond electron beams can drive hard X-FELs near the cold beam limit to generate coherent X-ray pulses of attosecond-Angstrom class, reaching saturation after only 10 metres of undulator. This plasma-X-FEL opens pathways for novel photon science capabilities, such as unperturbed observation of electronic motion inside atoms at their natural time and length scale, and towards higher photon energies.
