New Research On Neutron Spectrum Measurement

The fusion reactor has no high-end nuclear waste while providing energy,not poses big pollution to environment,and fuel supply is adequate.At the same time,the fusion reactor has high economic and social benefits,and has a broad of prospects for development.The detection of neutron spectrum in fusion reactor can understand the situation in core,guide reactor control,and provide support for the research of neutron spectrum detection method of fusion reactor.This paper introduces the history and relevant situation of the fusion reactor and the status of the research on neutron detection at home and abroad and the development and research status of neutron energy spectrum measurement.Four neutron detection methods and four main fast neutron spectrum measurement methods are described in detail,and a neutron detection method suitable for fusion reactor is analyzed and put forward based on its principle and application scope.Later,based on the Monte Carlo method,using MCNP and GEANT4 procedures,within the fusion method of simulation based on the recoil proton neutron energy spectrum detection process,and analyzes the feasibility of this detection method and the factors that affect the method detecting deviation.The parameters affecting the detection performance of this detection method are the ratio of the diameter of polytetrafluoroethylene to the thickness of the polytetrafluoroethylene,the diameter and thickness of polytetrafluoroethylene are influenced by the influence of the ratio of the diameter of polytetrafluoroethylene to the thickness of the polytetrafluoroethylene.When the ratio of the diameter to thickness of the polytetrafluoroethylene is less than 0.001,the deviation of the detection method is small.