论文标题
解开辐射功率噪声的测量和与$ \ textit {ab intio} $计算的比较
Measurements of undulator radiation power noise and comparison with $\textit{ab initio}$ calculations
论文作者
论文摘要
通常，存储环中同步辐射功率的转向转向波动取决于电子束的6D相位空间分布。该作用与不同电子辐射的场的干扰有关。束内部的相对电子位置和速度的变化导致同步辐射源中每次发射的总发射能的波动。先前已经描述了这种效应在进入同步加速器辐射源之前假设恒定和相等的电子速度。在本文中，我们提出了一个通用公式，用于具有不可忽略的梁发散的波动。此外，我们在Fermilab的集成光学测试加速器（IOTA）存储环中的专用实验中证实了该公式。最后，讨论了梁仪器中可能的应用。
Generally, turn-to-turn fluctuations of synchrotron radiation power in a storage ring depend on the 6D phase-space distribution of the electron bunch. This effect is related to the interference of fields radiated by different electrons. Changes in the relative electron positions and velocities inside the bunch result in fluctuations in the total emitted energy per pass in a synchrotron radiation source. This effect has been previously described assuming constant and equal electron velocities before entering the synchrotron radiation source. In this paper, we present a generalized formula for the fluctuations with a non-negligible beam divergence. Further, we corroborate this formula in a dedicated experiment with undulator radiation in the Integrable Optics Test Accelerator (IOTA) storage ring at Fermilab. Lastly, possible applications in beam instrumentation are discussed.
