A waveguide overloaded cavity kicker for the HLSⅡ longitudinal feedback system

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LI Wu-Bin, ZHOU Ze-Ran, SUN Bao-Gen, WU Fang-Fang, XU Wei, LU Ping and YANG Yong-Liang. A waveguide overloaded cavity kicker for the HLSⅡ longitudinal feedback system[J]. Chinese Physics C, 2014, 38(3): 037003. doi: 10.1088/1674-1137/38/3/037003
LI Wu-Bin, ZHOU Ze-Ran, SUN Bao-Gen, WU Fang-Fang, XU Wei, LU Ping and YANG Yong-Liang. A waveguide overloaded cavity kicker for the HLSⅡ longitudinal feedback system[J]. Chinese Physics C, 2014, 38(3): 037003.  doi: 10.1088/1674-1137/38/3/037003 shu
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Received: 2013-05-21
Revised: 2013-06-27
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    沈阳化工大学材料科学与工程学院 沈阳 110142

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A waveguide overloaded cavity kicker for the HLSⅡ longitudinal feedback system

    Corresponding author: LI Wu-Bin,
    Corresponding author: SUN Bao-Gen,

Abstract: In the upgrade project of Hefei Light Source (HLSⅡ), a new digital longitudinal bunch-by-bunch feedback system will be developed to suppress the coupled bunch instabilities in the storage ring effectively. We design a new waveguide overloaded cavity longitudinal feedback kicker as the feedback actuator. The beam pipe of the kicker is a racetrack shape so as to avoid a transition part to the octagonal vacuum chamber. The central frequency and the bandwidth of the kicker have been simulated and optimized to achieve design goals by the HFSS code. A higher shunt impedance can be obtained by using a nose cone to reduce the feedback power requirement. Before the kicker cavity was installed in the storage ring, a variety of measurements were carried out to check its performance. All these results of simulation and measurement are presented.

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