论文标题
明亮的，极化的高重复速率极限紫外线线，用于巧合电子成像
Bright, polarization-tunable high repetition rate extreme ultraviolet beamline for coincidence electron-ion imaging
论文作者
论文摘要
经过数十年的钛（蓝宝石技术）的至高无上，基于Ytterbium的高阶谐波来源成为了需要高度超短途极端紫外线（XUV）辐射的实验的有趣替代方法。在本文中，我们描述了一种多功能实验设置，该设置在10-50 eV范围内提供XUV光子。级联的高谐波生成的使用使我们能够达到18 eV时平均功率的1.8兆瓦。提出了几种光谱聚焦方案，以选择单个谐波或一组高荷尔鱼类，从而选择一个脉冲序列。从圆形二色性实验的角度来看，我们使用谐振椭圆形的高谐波产生高度椭圆形Xuv辐射，并通过双脚架双子高谐波产生圆形极化XUV。作为原理实验的证明，我们将Xuv梁聚焦于巧合电子成像光谱仪，在那里我们测量了Xenon单体和二聚体的光电子动量角度分布。
After decades of supremacy of the Titanium:Sapphire technology, Ytterbium-based high-order harmonic sources are emerging as an interesting alternative for experiments requiring high flux of ultrashort extreme ultraviolet (XUV) radiation. In this article we describe a versatile experimental setup delivering XUV photons in the 10-50 eV range. The use of cascaded high-harmonic generation enables us to reach 1.8 mW of average power at 18 eV. Several spectral focusing schemes are presented, to select either a single harmonic or group of high-harmonics and thus an attosecond pulse train. In the perspective of circular dichroism experiments, we produce highly elliptical XUV radiation using resonant elliptical high-harmonic generation, and circularly polarized XUV by bichromatic bicircular high-harmonic generation. As a proof of principle experiment, we focus the XUV beam in a coincidence electron-ion imaging spectrometer, where we measure the photoelectron momentum angular distributions of xenon monomers and dimers.
