Since the flight test data are oftime domain, it needs to be converted into frequency domain by FFT method. Then it can be used to identify the system.
In addition, the ion energy of HPIB is also measured with Thomson spectrometer and timeofflightmethod and the results agree with those measured with a pile of thin films.
The study of the influence of neutron scattering by the surrounding medium and fragment detector on fission neutron spectrum measurement with time-of-flight (TOP) method has been carried out.