Transverse Emittance Exchange for Improved Injection Efficiency
Transverse Emittance Exchange for Improved Injection Efficiency
复制标题
横向发射率交换可提高注入效率
DOI：
10.18429/jacow-ipac2016-weoaa01
复制
发表时间：
2016
期刊：
影响因子：
--
通讯作者：
F. Kramer
中科院分区：
文献类型：
--
作者：
P. Kuske;F. Kramer
在大多数情况下，束流注入电子储存环在水平面和离轴。注入光束的水平发射度越大，环的接受度就必须越大。注入的光束通常由同步加速器传送。在环的垂直接受度足够大的情况下，人们可以利用在良好对准和调谐的同步加速器中达到的小垂直发射度，因为横向发射度可以在斜四极磁体的帮助下交换。几个可能的过程将被讨论：发射度交换与静态磁铁之间的同步加速器和环或发射度交换在同步加速器的传输线提取前不久与时间相关的磁铁。这可能是一个突然打开的正常或斜四极磁铁或斜四极场振荡的频率满足谐振条件。估计这些磁铁和他们的设计将给出。
In most cases beam is injected into electron storage rings in the horizontal plane and off-axis. The larger the horizontal emittance of the injected beam the larger the acceptance of the ring has to be. The injected beam is usually delivered by a synchrotron. In case the vertical acceptance of the ring is sufficiently large one can take advantage of the small vertical emittance reached in well aligned and tuned synchrotrons since the transverse emittances can be exchanged with the help of skew quadrupole magnets. A few possible processes will be discussed: emittance exchange with static magnets in the transfer line between synchrotron and ring or emittance exchange in the synchrotron shortly before extraction with time dependent magnets. This could be a suddenly switched-on normal or skew quadrupole magnet or skew quadrupole fields oscillating at a frequency fulfilling the resonance condition. Estimates for these magnets and their design will be given.