Anti-saturation improvement of front-end electronics for neutron detectors array system

The too strong pulse from a photomultiplier tube, produced by X-rays and gamma rays generated in the ICF experiment, leads to the saturation of the front-end electronics.It impedes normal circuit operation and measurement of the flight time of neutrons.An improved antisaturation nonlinear circuit has been put forward and tested on the basis of the frontend electronics structure and further analysis of its saturation.Simulation results indicate that the improved circuit could introduce great attenuations for large amplitude pulses and pass through small amplitude pulses.The baseline of the circuit can recover within 35 ns. The experimental test has got the same results as the simulation does. It shows that the improved solution is simple and effective, and it could ensure the normal cir