A current integrator for an electrostatic accelerator energy scale calibration system

摘要

A circuit diagram of the current integrator intended for the measurements of a positive particle-beam charge arriving at a target is described. The device converts the charge into a number of pulses (target current into the pulse repetition rate). The conversion factor is 10{sup}9 pulses/C (10{sup}9 Hz/A), the error is no more than ≤ + 1%, the dead time is absent, the input impedance is close to zero, and the temperature drift is no more than ≤ 1.2 ×10{sup}(-12) A/℃.