17–22 May 2026
C.I.D
Europe/Zurich timezone

Impact of initial energy spread on the accuracy of energy spread growth formula in a free electron laser

THP5652
21 May 2026, 16:00
2h
C.I.D

C.I.D

Deauville, France
Board: Thursday baguette: BF01
Poster Presentation MC5.D05: Coherent and Incoherent Instabilities Theory, Simulations, Code Development Poster session

Speaker

Weihong Huang (Tsinghua University)

Description

Evaluating the energy spread growth due to radiation is crucial for the design of steady-state microbunching (SSMB) insertion section. This study systematically benchmarks a classical analytical formula against three-dimensional numerical simulations to validate its accuracy under varying initial energy spreads. Our findings reveal that while the formula provides reliable estimations for beams with small initial energy spreads, its predictions deviate significantly as the initial energy spread increases. Such discrepancies arise because larger initial energy spreads amplify three-dimensional effects and nonlinear beam dynamics, which compromise the idealized analytical model. This study shows that comprehensive 3D simulations are indispensable for robust and accurate SSMB insertion section design.

Paper status Resubmitted proceeding files received and assigned to an editor. Accepted.

Authors

Weihong Huang (Tsinghua University) Xiujie Deng (Tsinghua University) Dr Zhilong Pan (Tsinghua University) Chuanxiang Tang (Tsinghua University)

Presentation materials

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