HIMM同步加速器的闭合轨道修正
Closed orbit correction of HIMM synchrotron
摘要：
闭合轨道的修正对同步加速器的运行有很大的影响。校正系统的设计是点阵设计的重要组成部分。建议将BPM设置在电子感应加速器振荡的峰值处。校正器需要位于\b{eta}功能大的位置或大误差源处。在HIMM同步加速器的闭合轨道校正仿真中，影响水平校正结果的一个重要原因是偶极磁铁的纵向对准误差。当双极磁铁偏转角较大时，应尽量减小这种对准误差。
英文摘要：
The correction of closed orbit has great influence on the operation of synchrotron. The design of correction system is one significant component of lattice design. It is suggested to set BPMs at the peaks of betatron oscillation. The correctors need to be located at the positions where \b{eta} function is large or the sources of large errors. In the simulation of the closed orbit correction of HIMM synchrotron, one important reason affecting the result of horizontal correction is the longitudinal alignment error of dipole magnet. It is advisable to decrease this kind of alignment error while the deflection angle of dipole magnet is large.
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