Experimental Method Research Of Neutron Correlated Imaging

Correlation imaging is a cross hot research of quantum information and imaging, which has wide application in biology, medicine, national defense, and so on. In recent years, the research of intensity correlation imaging which based on classical thermal light obtained significant breakthrough, the feasibility of correlation imaging with X-ray has been demonstrated. The theoretical research shows that neutron correlation imaging could be realized. This research provide a new technological approach that could realize the diffraction imaging which has spatial resolution of a atomistic level for the non-periodic object by using the incoherent thermal neutron source. So neutron Fourier-transform ghost imaging, which called neutron Fourier-transform correlation imaging, has become a main research direction of neutron imaging methodology.Neutron Fourier-trans form correlation imaging experiment is a challenging research work. There has no related reports of such experiment in the international. If the experiment can be confirmed quickly, China will have a leading position in neutron imaging research.Neutron Fourier-transform correlation imaging experiment is a new exploratory work. This research involves many important technologies, such as neutron monochrome, neutron splitting, neutron focusing, neutron detection, and so on. The most key point of neutron correlation imaging is appropriate neutron source. With the operation of many reactor neutron source, and the construction of China Spallation Neutron Source, these foundations provide a development platform for neutron Fourier-transform correlation imaging research.In view of several key technology of neutron Fourier-transform correlation imaging experiment, a feasible experiment method is proposed based on the theory analysis and numerical simulation. The primary results and innovation in this thesis are as follows.1. The development of correlation imaging and the present research status are reviewed. In addition, introduction of the classical and quantum interpretation of correlation imaging is provided. The correlation imaging theory with fermions is analyzed. The results indicate that neutron correlation imaging experiment is feasible in the existing conditions. 2. The experimental scheme of neutron correlation imaging is put forward by referencing the experiment with X-ray. And the requirement of neutron correlation imaging is analyzed in theory.3. According to the characteristics of neutron, the neutron MC-diffraction simulation model is founded. The numerical simulation of neutron phase contrast imaging has been carried out, and the influence of the experimental parameters on the imaging contrast is discussed.4. For the requirements of neutron correlation imaging, the reactor cold neutron source is chosen as experimental neutron source. The splitting method of neutron is discussed for the experimental scheme. The neutron monochromatic method is analyzed to satisfy the requirement of coherence time. To obtain high imaging quality, the method of neutron focusing is investigated.5. A high sensitive scintillation detector is used for the barrel measurement. The neutron camera with high spatial resolution is used for the plane measurement. The sequential control requirements of the experiment data acquisition system is discussed. A detector performance test platform is designed, and the n-y identification technology and radiation protection method in neutron detection are investigated.