Integrating current transformer calibration for charge measurement of electron beam generated in laser wakefield acceleration

This paper presents the calibration of the input-output characteristic of integrating current transformer (ICT) by digital signal generation and oscilloscope, gives the ratio of input and output of the calibrated ICT under different input pulse durations and amplitudes, the effect of input pulse duration on the ICT output pulse duration, the response of the ICT to the consecutive input pulses. The calibration reveals that the relation between input and output of ICT is linearity, and the ICT will output one signal when the interval of the successive signals is very small, and also the shape and duration of the output are independent of that of the input signal.