Calibration of Integrating Current Transformer

The integrating current transformer (ICT) is measurement devices used for accurate measurement of bunch charge, and the precise calibration is needed before the use of ICT. The calibration of the ICT produced by Bergoz company was discussed in this paper, and the problems appeared in calibration stage were analyzed. The research focused on baseline drift phenomenon when the input pulse repetition frequency increased to MHz range, and the mechanism of baseline drift and baseline restoration was analyzed. The results show that the ratio of the input pulse charge and output pulse charge is 9.67. The relative error of the pulse charge measurement is less than 5%.