LOM and HOM damping study in a superconducting deflecting cavity for ALS at LBNL

• 作 者: 施嘉儒 陈怀璧 唐传祥 郑曙昕
• 机 构: Department of Engineering Physics Tsinghua University,Beijing 100084,China,Department of Engineering
• 出 处: 中国物理C
• 发表日期: 2008年03期
• 关键词: waveguide impedance adding instability synchrotron damping degenerate longitudin

Superconducting deflecting cavities can be used in synchrotron light source to generate subpico- second X-ray pulses while the impedance of the lower order modes(LOM)and higher order modes(HOM) in the cavity should be kept below an accepted level to avoid beam instability.These modes can be damped by adding waveguide on beam pipe.Detailed simulation of Q in CST Microwave Studio is introduced and experiment results on an aluminum model cavity with damping waveguide are reported to make a comparison.

Superconducting deflecting cavities can be used in synchrotron light source to generate subpico-second X-ray pulses while the impedance of the lower order modes (LOM) and higher order modes (HOM) in the cavity should be kept below accepted level to avoid beam can be damped by adding waveguide on beam pipe. Detection of Q in CST Microwave Studio is introduced and experiment results on an aluminum model cavity with damping waveguide are reported to make a comparison.