High Energy Accelerator Research Organization, KEK, Tsukuba, 305-0801, Japan.
Phys Rev Lett. 2009 Oct 2;103(14):144802. doi: 10.1103/PhysRevLett.103.144802. Epub 2009 Oct 1.
We report turn-by-turn observation of coherent synchrotron radiation (CSR) produced by the laser bunch slicing technique at an electron storage ring operated with a small momentum compaction factor. CSR emission was intermittent, and its interval depended strongly on the betatron tune. This peculiar behavior of the CSR could be interpreted as a result of coupling between the transverse and longitudinal motion of the electrons. This is the first observation of such an effect, which would be important not only for controlling the CSR emission but also for generating and transporting ultrashort electron bunches or electron bunches with microdensity structures in advanced accelerators.
我们报告了在一个运行时动量压缩因子较小的电子储存环中，采用激光束分切技术产生的相干同步辐射（CSR）的逐圈观测结果。CSR 发射是间歇的，其间隔强烈依赖于 betatron 调谐。这种 CSR 的特殊行为可以解释为电子横向和纵向运动之间的耦合结果。这是首次观察到这种效应，这不仅对于控制 CSR 发射很重要，而且对于在先进加速器中产生和传输超短电子束或具有微密度结构的电子束也很重要。
