标题： 亮准相位匹配的软X射线谐波辐射从氩离子产生 显示英文标题

标题： Bright quasi-phasematched soft x-ray harmonic radiation from Argon ions

摘要： 展示了填充氩气的直孔波导中产生的扩展至水窗波段（~4 nm）谐波的选择性增强（>10^3）。该增强与模型预测结果高度吻合，表明通过基模和高阶空心模之间拍频引起的快速轴向强度调制实现了多模准相位匹配（MMQPM）。首次观察到从氩离子发出的超过碳K边（~4.37 nm，~284 eV）至~360 eV范围内的显著脉冲能量（每个谐波阶次每脉冲>10 nJ）。 显示英文摘要

摘要： Selective enhancement (>10^3) of harmonics extending to the water window (~4nm) generated in an argon gas filled straight bore capillary waveguide is demonstrated. This enhancement is in good agreement with modeling which indicates that multimode quasi-phasematching (MMQPM) is achieved by rapid axial intensity modulations caused by beating between the fundamental and higher order capillary modes. Substantial pulse-energies (>10nJ per pulse per harmonic order) at wavelengths beyond the carbon K-edge (~4.37nm, ~284eV) up to ~360eV are observed from argon ions for the first time.