| Analysis of sextupole effects on β function beating in the SSRF storage ring |
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| 作者姓名： | 田顺强 后接 陈光玲 刘桂民 |
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| 作者单位： | Shanghai Institute of Applied Physics Chinese Academy of Sciences，Shanghai 201800，China Graduate University of Chinese Academy of Sciences，Beijing 100049，China，Shanghai Institute of Applied Physics，Chinese Academy of Sciences，Shanghai 201800，China Graduate University of Chinese Academy of Sciences，Beijing 100049，China，Shanghai Institute of Applied Physics，Chinese Academy of Sciences，Shanghai 201800，China Graduate University of Chinese Academy of Sciences，Beijing 100049，China，Shanghai Institute of Applied Physics，Chinese Academy of Sciences，Shanghai 201800，China |
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| 摘 要： | In a storage ring, asymmetry of the β function with momentum deviation is the main reason for asymmetry of the dynamic aperture. This paper applies simulation method based on AT code in Matlab to investigate sensitivity of the β function beating and the tune shift to quadrupole field error with the presence of bending field error in the Shanghai Synchrotron Radiation Facility (SSRF) storage ring. Sextupole effect on the variation trend is analyzed. Dynamics of the lattice for working points close to and away from the second order structural resonance stop-band are compared. These results show that the β function beating with momentum deviation doesn't lie in the influence of the second order structural resonance stop-bands completely, but it is relevant to lattice structure.
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| 关 键 词： | SSRF storage ring sextupole β function structural resonance stop-band |
| 收稿时间： | 2007-08-16 |
| 修稿时间： | 2007-09-19 |
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