HOMs Simulation and Measurement Results of IHEP02 Cavity
Hongjuan Zheng, Jiyuan Zhai, Tongxian Zhao, Jie Gao
TL;DR
This paper presents measurement and simulation results of higher order modes in the IHEP02 1.3GHz superconducting cavity, comparing them with TESLA cavity data to assess their impact on beam quality.
Contribution
It provides experimental and simulation data on HOMs in the IHEP02 cavity, highlighting differences and similarities with TESLA cavity results.
Findings
Qe values of dangerous modes measured and compared
R/Q of passbands obtained by simulation and comparison
Differences identified between IHEP02 and TESLA cavity HOMs
Abstract
In cavities, there exists not only the fundamental mode which is used to accelerate the beam but also higher order modes (HOMs). The higher order modes excited by beam can seriously affect beam quality, especially for the higher R/Q modes. This paper reports on measured results of higher order modes in the IHEP02 1.3GHz low-loss 9-cell superconducting cavity. Using different methods, Qe of the dangerous modes passbands have been got. The results are compared with TESLA cavity results. R/Q of the first three passbands have also been got by simulation and compared with the results of TESLA cavity.
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