Development And Research Of Neutron Flux Data Acquisition Technique With Multiple Space-Time Channels Based On A Microcomputer

This thesis introduces a data acquisition system of neutron flux with multiple space-time channels based on a microcomputer, used for the neutronics experimental facility of accelerator driven reactor QIMINGXING - 1. The project of design, electric circuit principle design, manufacture, the development of data acquisition application software and driver ...etc. are introduced in this thesis. After the principle software simulation and performance parameter testing to some electric circuits, the data acquisition system's single channel prototype was used to data measure in the Miniature Neutron Source Reactor (MNSR) of China Institute of Atomic Energy (CAIE) .The thesis is divided into six chapters: Chapter 1 introduces the research work of neutron flux temporal and spatial distribution and neutron dynamics; Chapter 2 describes a total the project of design for the data acquisition system of neutron flux with multiple space-time channels based on a microcomputer; Chapter 3 tells the analog circuits and parameters measure of the data acquisition system of neutron flux with multiple space-time channels based on a microcomputer, and detailed describes the neutron detector's type and features, the project of D.C. high voltage power supply, the research work of current sensitive preamplifier, timing amplifier, fast discriminator, shaped circuits and the project of distant signal transmission. In chapter 4, data acquisition software development of data acquisition system of neutron flux with multiple space-time channels based on a microcomputer is introduced, and includes the hardware principle and application of the timer/counter card used for the system's neutron pulse counter, the design and program of data acquisition software, the program of drivers and the interface and functions of data acquisition software. Chapter 5 describes the experiment of the detection of a point's neutron flux temporal distribution with this system in the MNSR of CAIE. The experimentdemonstrates that the measure of neutron flux from multiple spatial locations can be achieved synchronously; the instance of the neutron flux level varieties with time in set time can also gained when using this system for data acquisition of neutron flux. Chapter 6 is summary and outlooks.This thesis is the technology elements for development of the data acquisition system of neutron flux with multiple space-time channels based on a microcomputer, that provide technology sustain to realize the data acquisition system of neutron flux with multiple space-time channels based on a microcomputer.