Suppression of coherent synchrotron oscillation of the SPring-8 storage ring
Suppression of coherent synchrotron oscillation of the SPring-8 storage ring
复制标题
SPring-8存储环相干同步加速器振荡的抑制
DOI：
10.1109/pac.2001.987247
复制
发表时间：
2001
期刊：
影响因子：
--
通讯作者：
N. Kumagai
中科院分区：
文献类型：
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作者：
T. Ohshima;N. Kumagai
为了在SPring-8等第三代同步辐射光源中实现高亮度光子束，消除存储电子束的轨道振动是非常重要的。在SPring-8储存环上，利用位于色散段的BPM观测到了振幅为0. 2 mmp-p的相干同步辐射振荡。由于能量振荡幅度与相位噪声幅度和动量压缩因子的倒数的乘积成正比，因此能量振荡幅度被低动量压缩因子增强。为了使这种同步振荡的幅度尽可能低，我们通过测量同步频率附近的噪声水平来检查合成器的性能，并选择具有最佳性能的合成器。此外，通过对RF参考信号施加频率调制，在约1/10内校正剩余幅度。
For the realisation of a highly brilliant photon beam in a third generation synchrotron radiation source such as SPring-8, it is very important to eliminate an orbital vibration of the stored electron beam. In the SPring-8 storage ring, coherent synchrotron oscillation with amplitude of 0.2 mmp-p was observed by BPM located in a dispersive section. Since the energy oscillation amplitude is proportional to the product of the phase noise amplitude and the inverse of the momentum compaction factor, the energy oscillation amplitude is enhanced by low momentum compaction factor. To make the amplitude of this synchrotron oscillation as low as possible, we checked the performance of synthesiser by measuring the noise level around the synchrotron frequency, and selected a synthesiser with best performance. Furthermore, the remaining amplitude was corrected within about 1/10 by applying frequency modulation to the RF reference signal.