Design of a higher harmonic cavity for the SSRF storage ring

Guang-ming, MA; Zhao, Zhentang; Liu, Jianfei

doi:10.1088/1674-1137/32/4/007

Cited by 10 publications

(1 citation statement)

References 9 publications

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“…Higher harmoic cavities (HHC) can be employed in storage rings to control the bunch length [1]. To improve the beam lifetime, HHCs have been used to increase bunch length in many storage rings around the world [2][3][4][5][6]. HHCs are also an attractive option for shortening bunches.…”

Section: Introductionmentioning

confidence: 99%

Calculations for shortening the bunch length in storage rings using a harmonic cavity

Fan¹,

Wu²,

He³

2014

Chinese Phys. C

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Using the Hefei Light Source phase II project (HLS- II) as an example, a theoretical analysis of shortening the bunch lengths using a higher harmonic cavity (HHC) is given. The threshold voltage of an active HHC and the threshold tuning angle of a passive HHC are first analysed. The optimum tuning angle for the constant detuning scenario and the optimum harmonic voltage for the constant voltage scenario are presented. The calculated results show that the reduced bunch length is about half that of the nominal bunch. The bunch lengths vary from 11 mm at 0.1 A to 7 mm at 0.4 A for the constant detuning scenario, while the bunch lengths are around 7 mm over the beam current range for the constant voltage scenario. In addition, the synchrotron frequency spread is increased. It indicates that HHC may be used to reduce the bunch length and increase the Landau damping of synchrotron oscillations in a storage ring.

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