Potential Well Distortion Effects and Bunch Shift Compensation

Wang Lanfa; Lin Yuzheng

Chinese Physics C> 1999, Vol. 23> Issue(10) : 1024-1032

Potential Well Distortion Effects and Bunch Shift Compensation

Wang Lanfa ^, ,
Lin Yuzheng

Department of Engineeing Physics, Tsinghua University, Beijing 100084

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Abstract：
An analytic treatment of multi-bunch potential well distortion for general bunch distribution case along one storage ring is presented. Resulting simple analytic formulas describe the mode loss and the synchrotron tune shift experienced by a given bunch within the beam, as a function of the resonance frequency. We can know how to modify the existing configuration of parasitic cavity resonance (via frequency tuning) so that the resulting potential well distortion effects are minimized. We can also know how to compensate the bunch shift by using sub-RF cavity.

References

[1]

Chan Alezander Wu.Physics of Collective Beam Instabilities in High Energy Accelerators, Wiley–Interscience Publication, John Wiley Sons, Inc., 19922 Laclare J L. Bunch Beam Coherent Instabilities, CERN 87–03, 1987, 1:264—3263 KUBO K, Higo T, Sakanaka S, Compensation of Bunch Position Shift Unsing Sub–RF Cavity in a Danping Ring, IEEE 1993, 3503—35054 Zimmermann F, Raubenheimer T O. Thomoson K A. Multi–bunch Energy Compensation in the NLC Bunch Compressor, SLAC–PUB–7141 5 Wang Lanfa, Zhang Chuang, Wans Shuhong.High Energy Physics Nuclear Physics(in Chinese), 1998, 22(12):1174 (王兰法,张闯,王书鸿等.高能物理与核物理,1998,22(12):1174)

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Wang Lanfa and Lin Yuzheng. Potential Well Distortion Effects and Bunch Shift Compensation[J]. Chinese Physics C, 1999, 23(10): 1024-1032.

Wang Lanfa and Lin Yuzheng. Potential Well Distortion Effects and Bunch Shift Compensation[J]. Chinese Physics C, 1999, 23(10): 1024-1032. shu

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Received: 1998-07-22
Revised: 1900-01-01

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沈阳化工大学材料科学与工程学院沈阳 110142

Potential Well Distortion Effects and Bunch Shift Compensation

Wang Lanfa ^,
Lin Yuzheng

Corresponding author: Wang Lanfa,

Department of Engineeing Physics, Tsinghua University, Beijing 100084

Received Date: 1998-07-22
Accepted Date: 1900-01-01
Available Online: 1999-10-05

Abstract: An analytic treatment of multi-bunch potential well distortion for general bunch distribution case along one storage ring is presented. Resulting simple analytic formulas describe the mode loss and the synchrotron tune shift experienced by a given bunch within the beam, as a function of the resonance frequency. We can know how to modify the existing configuration of parasitic cavity resonance (via frequency tuning) so that the resulting potential well distortion effects are minimized. We can also know how to compensate the bunch shift by using sub-RF cavity.