Electron bunch train excited higher-order modes in a superconducting RF cavity

  • Higher-order mode (HOM) based intra-cavity beam diagnostics has been proved effective and convenient in superconducting radio-frequency (SRF) accelerators. Our recent research shows that the beam harmonics in the bunch train excited HOM spectrum, which have much higher signal-to-noise ratio than the intrinsic HOM peaks, may also be useful for beam diagnostics. In this paper, we will present our study on bunch train excited HOMs, including a theoretical model and recent experiments carried out based on the DC-SRF photoinjector and SRF linac at Peking University.
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null. Electron bunch train excited higher-order modes in a superconducting RF cavity[J]. Chinese Physics C, 2017, 41(4): 047002. doi: 10.1088/1674-1137/41/4/047002
null. Electron bunch train excited higher-order modes in a superconducting RF cavity[J]. Chinese Physics C, 2017, 41(4): 047002.  doi: 10.1088/1674-1137/41/4/047002 shu
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Electron bunch train excited higher-order modes in a superconducting RF cavity

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Abstract: Higher-order mode (HOM) based intra-cavity beam diagnostics has been proved effective and convenient in superconducting radio-frequency (SRF) accelerators. Our recent research shows that the beam harmonics in the bunch train excited HOM spectrum, which have much higher signal-to-noise ratio than the intrinsic HOM peaks, may also be useful for beam diagnostics. In this paper, we will present our study on bunch train excited HOMs, including a theoretical model and recent experiments carried out based on the DC-SRF photoinjector and SRF linac at Peking University.

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