The anti-bend cell for ultralow emittance storage ring lattices
The anti-bend cell for ultralow emittance storage ring lattices
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DOI：
10.1016/j.nima.2013.11.064
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发表时间：
2014-02
影响因子：
1.4
通讯作者：
A. Streun
中科院分区：
文献类型：
--
作者：
A. Streun
负偏转的小弯曲磁体（称为抗弯曲）可用于通过提供色散函数与理论最小发射度（TME）条件的适当匹配来降低周期晶格单元的平衡发射度。当抗弯曲偏转角约为主偏转磁体角度的−10%时，可以实现2倍的低发射度。将水平聚焦集成到抗弯曲中导致经济的半四极磁体设计，其允许方便地调整阻尼分区以进一步减小发射度。抗弯曲单元（ABC）的使用通过具有非常低的发射度和用于短脉冲操作的选项的紧凑存储环的草案设计来举例说明。
A small bending magnet of negative deflection, called anti-bend, can be used to reduce the equilibrium emittance of a periodic lattice cell by providing the proper matching of the dispersion function to the theoretical minimum emittance (TME) condition. With an anti-bend deflection angle of about −10% of the main bending magnet angle, a factor of 2 lower emittance can be achieved. Integration of horizontal focusing into the anti-bend leads to an economic half-quadrupole magnet design, which allows the damping partitions to be conveniently adjusted for further emittance reduction. The use of the anti-bend cell (ABC) is exemplified by the draft design of a compact storage ring with very low emittance and options for short pulse operation.