Research Of Reconfiguurable Nuclear Instrument System

Nuclear instruments are now facing a new wave of technological updates which is brought by expansion of the range of applications and the development of reconfigurable technology. The methods of the traditional nuclear instruments cannot match the experimental requirements in many ways. Meanwhile, the current reconfigurable technology urges the significant technological change in the field of nuclear instruments. A novel reconfigurable nuclear instrument system which is based on reconfigurable technology and digital algorithms will take place the traditional instrument. In this critical moment in history, the study on the reconfigurable nuclear instrument will pave a new way to nuclear detection technology.The reconfigurable technology rising in recent years has been widely applied in many fields, such as radar, antenna, and computer structures. But there are not any reports about reconfigurable technology in the field of nuclear instruments.Deverse requirments come out due to the deepening of the study of physics experiments and the continuous expansion of application range. The nuclear instrument fell into a non-stop development and revision, that wastes a lot of manpower, material and financial resources. To solve this problem, based on the characteristics of physics experiments in the laboratory, this work presented a structure of reconfigurable nuclear instrument system using reconfigurable In a well-designed platform, a variety of algorithms achieve the different types of measurements. And at the same time, the off-line algorithms are used to correct and compensate the weakness of hardware performance. Reconfigurable nuclear instrument can be easily, quickly and cost-effectively rebuilt as a new experimental apparatus, making the experiments goes smoothly.This work analyzes the characteristics of the physical experiments. From the content, scale and methods, we conclude the requirements as the basis for the design of the system. Details of the overall design, hardware design, real-time algorithm, off-line algorithm, and software design are discussed respectively. Some elementary measurement has been done include the bandwidth, ENOB, precison of TDC and the nonlinearity of DAC. Three different types of experimental applications are described. They are spectrum measurement of22Na, GM tube plateau measurement and feedback control in non-degenerate entanglement swapping experiment. These experiment illustrate the reconfigurable nuclear instrument system could take different experimental tasks conveniently.The innovation of this thesis is as follows:(1) This work brings the concept of reconfigurable into the field of nuclear instruments and creates the idea of reconfigurable nuclear instrument. Reconfigurable concept aimed to balanced flexibility and efficiency of computing technology. Nuclear nuclear instrument uses the experience of reconfigurable computing, which make the nuclear instrument have the advantage of both efficiency and flexibility(2) This work developed a reconfigurable nuclear instrument, completed three different experiments. The functional change of the nuclear instruments requires the reconfigure of the front-end, digital, logic calculation, and off-line alogrithms. The reconfigure of nuclear instruments is a systematic, integrated process. Every part cooperates together in order to achieve the desired objectives.(3) Reconfigrable nuclear instrument help achive the non-degenerate entangled photon exchange experiment by reconfiguring the systems completing high-precision time measurement, nonlinear calculations, and feedback control. During the experiment, high-precision time measurement (～33ps), fast and accurate feedback control output is the key to the success of the experiment. Reconfigrable nuclear instrument satisfies the requirements at the same time. So, under the support of reconfigure, the non-degenerate entangled photon exchange experiment has been complished firstly.