Measurement of the Bunch Length on the UVSOR Storage Ring
Measurement of the Bunch Length on the UVSOR Storage Ring
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UVSOR 存储环上束长度的测量
DOI：
10.1143/jjap.31.921
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发表时间：
1992
期刊：
影响因子：
--
通讯作者：
G. Isoyama
中科院分区：
文献类型：
--
作者：
A. Lin;H. Hama;S. Takano;G. Isoyama
我们测量了紫外同步轨道辐射（UVSOR）存储环在0.1 ~ 70 mA束流区、500 ~ 750 MeV能量范围内单束运行时的束长。在低束流条件下，通过同时测量束长和同步加速器振荡频率，实验确定了当前工作点的动量压缩系数。束长随着束流的增大而逐渐增大，束长随着束流能量的减小而增大。这种束延长的行为与势阱畸变理论的预测非常吻合。在此基础上，估计了有效的纵向耦合阻抗是束长的函数。
We have measured the bunch length in single-bunch operation of the UVSOR (Ultraviolet Synchrotron Orbital Radiation) storage ring in a beam current region from 0.1 to 70 mA at energies ranging from 500 to 750 MeV. The momentum compaction factor of the present operation point is determined experimentally from the bunch length and the synchrotron oscillation frequency measured simultaneously at a low beam current. The bunch length increases gradually as the beam current increases, and bunch lengthening is larger when the beam energy is lower. This behavior of bunch lengthening agrees well with a prediction of the potential-well distortion theory. Based on the theory, the effective longitudinal coupling impedance is estimated as a function of bunch length.