Time response of helium scintillation fission neutron detector

A new helium scintillation fission neutron detector was designed to detect the neutrons in the mixed pulse fission radiation field. The time response of the detector was investigated through theoretical and experimental methods. The flying time of the fragments and recoiled helium nucleus in helium scintillator were calculated based on the experimental formulae and method of Monte Carlo. The formula of detectors time response was deduced from the convolution method. The result of the calculating detectors wave indicated that the risetime was about 19.5 ns and FWHM was about 31.0 ns. The time response was measured on the dense plasma focus device(DPF) neutron generator. The theoretical results of time response were consistent with experimental results.