Simulation studies on laser pulse stability for Dalian Coherent Light Source

TL;DR

This paper uses detailed simulations to analyze how various errors in the electron beam affect the stability of laser pulses in the Dalian Coherent Light Source, guiding its design.

Contribution

It provides a comprehensive sensitivity analysis of FEL pulse energy fluctuations to electron bunch errors, aiding the design of stable FEL sources.

Findings

Identified key error sources impacting FEL pulse stability.

Quantified the tolerance levels for LINAC output parameters.

Guided design considerations for stable FEL operation.

Abstract

Dalian Coherent Light Source will use a 300MeV LINAC to produce fully coherent photon pulses in the wavelength range between 150-50nm by high gain harmonic generation free electron laser (FEL) scheme. To generate stable FEL pulses, stringent tolerance budget is required for the LINAC output parameters, such as the mean beam energy stability, electron bunch arrival time jitter, peak current variation and the transverse beam position offset. In order to provide guidance for the design of the Dalian Coherent Light Source, in this paper, the sensitivity of FEL pulse energy fluctuation to various error sources of the electron bunch was performed using intensive start-to-end FEL simulations.