LASER COOLING OF ELECTRON BUNCHES IN COMPTON STORAGE RINGS
LASER COOLING OF ELECTRON BUNCHES IN COMPTON STORAGE RINGS
复制标题
康普顿存储环中电子束的激光冷却
DOI：
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发表时间：
2004
期刊：
影响因子：
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通讯作者：
E. Bulyak
中科院分区：
文献类型：
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作者：
E. Bulyak
对康普顿存储环中循环的束团的自洽动力学进行了分析研究。来自同步加速器和康普顿辐射的干扰都被考虑在内。评估了激光主导环（其中同步加速器能量损失比康普顿环小得多）的发射率。将所得发射度（同步加速器加康普顿）与同步加速器进行比较。如图所示，由于康普顿散射，纵向自由度被加热。几乎相同的结论对于垂直非耦合电子感应加速器发射度也是有效的。由于原则上不可能在带状磁体中获得零色散，因此径向发射率几乎总是通过激光冷却。因此，在耦合横向振荡且水平发射率决定垂直发射率的实际情况下，激光器将冷却横向自由度。
Self–consistent dynamics of a bunch circulating in the Compton storage ring has been studied analytically. Disturbances from both the synchrotron and Compton radiations were taken into account. The emittances in laser– dominated rings (where the synchrotron energy losses are much smaller then the Compton ones) were evaluated. The resultant emittances (synchrotrons plus Comptons) were compared with the synchrotrons. As were shown, the longitudinal degree of freedom is heated up due to Compton scattering. Almost the same conclusion is valid for the vertical uncoupled betatron emittance. Since it is impossible in principle to get zero dispersion in the banding magnets, the radial emittance almost always cooling down by laser. Therefore in practical cases of coupled transverse oscillations with the horizontal emittance determining the vertical one, the laser will cool down the transverse degrees of freedom.