数字化平均流强测量方法研究

Digital DC beam current measurement on SSRF storage ring

平均流强测量可用DCCT或ICT探头,ICT探头有很强的抗电磁干扰能力,但测量精度不高。用高精度A/D转换器和等效采样测量算法使ICT探头组成的平均流强测量系统有较高的测量精度。本文主要介绍了基于ICT探头的平均流强测量系统、测量算法和实验室测试结果。

Both DC current transformer （DCCT） and integrating current transformer （ICT） can be used in DC beam current measurement. The ICT has strong capability of resisting electromagnetic interference, but its measurement accuracy cannot satisfy the DC beam current measurement requirement when using traditional high speed A/D. With high resolution A/D and equivalent sampling system, DC beam current measuring system based on ICT can reach high accuracy compared with DCCT system. In this paper, the ICT-based DC beam current measurement, equivalent sampling method and testing results at Shanghai Synchrotron Radiation Facility （SSRF） is described.