Work

Compensation for the source drift of a free-electron laser beamline by adjusting the fixed-focus constant of the grating monochromator

Year: 2025

Type: article

Abstract: For large-scale free-electron laser facilities based on linear accelerators, the laser saturation point is not frequently fixed in the undulator, which will cause a longitudinal source point drift of the beamline. The longitudinal source point drift will cause an instability in the performance of the beamline, especially affecting the energy-resolving power of variable-line-spacing grating monochromators for soft X-ray beamlines. A method of adjusting the fixed-focus constant to compensate for this longitudinal source point drift is introduced in this work. Simulation results indicate that this method can effectively recover the energy-resolving power of the grating monochromator.

Source: Journal of Synchrotron Radiation

DOI: 10.1107/s1600577524012116

Authors: Chaofan Xue, Lian Xue, Yong Wang, Renzhong Tai

Institutions: Chinese Academy of Sciences, Shanghai Advanced Research Institute, Shanghai Synchrotron Radiation Facility

Language: English

Topic: Particle Accelerators and Free-Electron Lasers

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $3,180

Funder: National Key Research and Development Program of China