论文标题
在低能光注射器中的切片能量扩散测量
Slice energy spread measurement in the low energy photoinjector
论文作者
论文摘要
切片能传播是游离电子激光优化的关键参数之一，但其准确的测量并不简单。 Swissfel和欧洲XFEL的高能量（$> $ 100 MEV）光注射器的两项最新研究报告的切片能量扩散远高于其XFEL工作点（200-250 PC）的预期。在本文中，在Desy Zeuthen（Pitz）的PhotoInightor测试设施（PITZ）提出了一种测量切片能量（$ \ sim $ 20 MEV）的新方法（$ \ sim $ 20 MEV），而250 PC和500 PC的结果远低于在高能注射器下测得的结果。
Slice energy spread is one of the key parameters in free electron laser optimizations, but its accurate measurement is not straightforward. Two recent studies from high energy ($>$100 MeV) photoinjectors at SwissFEL and European XFEL have reported much higher slice energy spread than expected at their XFEL working points (200 - 250 pC). In this paper, a new method for measuring slice energy spread at a lower beam energy ($\sim$20 MeV) is proposed and demonstrated at the PhotoInjector Test facility at DESY Zeuthen (PITZ), and the results for 250 pC and 500 pC are much lower than those measured at high energy injectors.
