Speaker
Huaiqian Yi
(Institute of Advanced Science Facilities)
Description
Longitudinal wake fields are generated when relativistic electron beams pass through the narrow undulator vacuum chambers. The wake field, and the relatively weaker longitudinal space charge field, may cause considerable energy variations along the beam and influence the FEL radiation process. In this work, the wake field due to finite conductivity of the vacuum chamber material and the inner surface roughness are considered. Simulations are performed using beam and undulator parameters from Shenzhen Superconducting Soft X-Ray Free-electron Laser (S3FEL). Both effects are included in the simulations and their influences on the SASE-FEL performance are investigated.
Authors
Huaiqian Yi
(Institute of Advanced Science Facilities)
Xiaofan Wang
(Institute of Advanced Science Facilities)
Lingjun Tu
(Institute of Advanced Science Facilities)
Weiqing Zhang
(Dalian Institute of Chemical Physics)
