Slice energy spread measurement in the low energy photoinjector

Slice energy spread measurement in the low energy photoinjector

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 x-ray free electron laser (XFEL) have reported much higher slice energy...

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Bibliographic Details
Main Authors: Houjun Qian, Mikhail Krasilnikov, Anusorn Lueangaramwong, Xiangkun Li, Osip Lishilin, Zakaria Aboulbanine, Gowri Adhikari, Namra Aftab, Prach Boonpornprasert, Georgi Georgiev, James Good, Matthias Gross, Christian Koschitzki, Raffael Niemczyk, Anne Oppelt, Guan Shu, Frank Stephan, Grygorii Vashchenko, Tobias Weilbach
Format: Article
Language:English
Published: American Physical Society 2022-08-01
Series:Physical Review Accelerators and Beams
Online Access:http://doi.org/10.1103/PhysRevAccelBeams.25.083401
Description
Summary: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 x-ray free electron laser (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 lower beam energy (∼20  MeV) is proposed and demonstrated at the PhotoInjector Test facility at DESY Zeuthen, and the results for 250 pC are much lower than those measured at high energy injectors.
ISSN:2469-9888

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