DESIGN AND SIMULTION OF MICRO-CURRENT AMPLIFIER FOR SIGNAL MEASUREMENT OF CESIUM BEAM TUBE WITH MAGNETIC STATE SELECTION

A rapid micro-current amplifier is presented to measure the signal of CBT by analyzing signal characteristic and noise of cesium beam tube with magnetic state selection,which is based the high-precision OPA128LM.Then,a micro-current source was designed and the circuit was debugging by the Protel software.In the end,the simulation result shows that the micro-current source satisfied the design demand.