A New Method to Diagnose the Time Constant of a Subcritical Device

Abstract

The DPF (Dense Plasma Focus) pulsed neutron source method is a new method to confirm the instantaneous time multiplication constant (usually called α eigenvalue) of a sub-critical device, its feasibility is proved by our research before.In this article, a new experiment method of measuring γ intensity in the subcritical device to diagnose the time constant is raised ,and turned out to be practical by the numerical calculation and the experiment, Considering the two different DPF pulsed neutron source, the validity of this method and the limitation of this method is also discussed.