采用固定式波纹被动尾场条纹相机的纵向相空间诊断
Longitudinal phase space diagnostics with a nonmovable corrugated passive wakefield streaker
AI总结：
本研究针对自由电子激光装置的时间分辨诊断需求，分析被动尾场条纹装置的切片能量分辨率及能量啁啾的影响，利用European XFEL的固定式波纹条纹相机实现了飞秒级时间、MeV级能量分辨率的纵向相空间测量。
摘要：
自由电子激光（FEL）装置的时间分辨诊断，尤其是电子束纵向相空间（LPS）和FEL功率分布测量，可为用户、机器研发研究和束流调试提供极具价值的信息。我们研究了被动条纹装置的切片能量分辨率，重点分析能量啁啾对测量得到的切片能散的影响。在European XFEL的硬X射线SASE2光束线下游，这些测量通过一块单板固定式被动尾场条纹相机实现，其本质是放置在真空室内的矩形波纹板。我们展示了时间分辨率低至几飞秒、能量分辨率低至几MeV的测量结果。
英文摘要：
Time-resolved diagnostics at Free-Electron Laser (FEL) facilities, in particular electron beam longitudinal phase space (LPS) and FEL power profile measurements, provide information highly valuable for users, machine development studies, and beam setup. We investigate the slice energy resolution of passive streaker setups, in particular the effect of an energy chirp on the measured slice energy spread. Downstream of the hard X-ray SASE2 beamline at the European XFEL, these measurements are enabled by a single-plate non-movable passive wakefield streaker, essentially a rectangular corrugated plate placed inside a vacuum chamber. We show measurements with a time resolution down to a few femtoseconds, and an energy resolution down to a few MeVs.
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