Speaker
Haiyan Yao
(University of Science and Technology of China)
Description
The In-Vacuum Undulator (IVU) exhibits exceptionally strong trapped-mode impedance due to its distinctive ridge-loaded waveguide structure and narrow magnetic gap design, which may lead to beam instability issues. This study systematically investigates the trapped-mode impedance in the Hefei Advanced Light Facility's (HALF) IVU using both eigenmode and wakefield solvers in CST Studio Suite, with comparative calculations of vertical trapped-mode impedance for structures with and without pumping ports. The results demonstrate that impedance values significantly exceed the synchrotron radiation damping threshold.
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Author
Haiyan Yao
(University of Science and Technology of China)
Co-authors
Tianlong He
(University of Science and Technology of China)
Weiwei Li
(University of Science and Technology of China)
Mr
Xiaoyu Liu
(University of Science and Technology of China)
Zhenghe Bai
(University of Science and Technology of China)
