Icf Experimental Physics Diagnosis Centralized Control System Design

This thesis describes the research and development works of the Central Control System for Physical Diagnosis in Large ICF experiments, which is being built as a key part of the SG-III laser fusion facility prototype project in Chinese Academy of Engineering Physics (CAEP). This system will be responsible for the decision-making of fusion, the selection of experiment strategies and management of detectors and data acquisition (DAQ) systems. The thesis introduces the synchronous trigger subsystem and the instruction synchronization subsystem of the central control system for physical diagnosis. The two subsystems can satisfy the current ICF experiment needs.The synchronous system is the key part of central control system for physical diagnosis. It will issue the timing signals and control instructions to the physical diagnosis devices in the ICF experiments. After investigating and analyzing the characteristics of current real-time control systems and synchronous systems used in laser fusion experiment, the author designs a new synchronous system for central control system to meet the physical diagnosis requirements of SG-III facility and do some further researches about relative problems.The synchronous system consists of instructions synchronization subsystem and high speed synchronous trigger subsystem. The former is used to process synchronized instructions, which assert the current statement of laser devices, detectors and DAQ devices, and to initiate the control programs for those devices. The latter mainly produce a series of high speed and high precise delayed signals to trigger oscillographs, streak cameras, framing cameras and high speed DAQ devices.For the high speed synchronous trigger subsystem, the present high speed trigger system used in ICF experiments was introduced first in the thesis. Then the research and development works are introduced. The traditional synchronous trigger devices are not standard instrumental so that the author rebuilds the synchronous trigger device as a PXI card. In the design works, the author takes the high speed digital system design technologies and methods. The results of testing about synchronous trigger subsystem are introduced at last. In the thesis, the author describes the characteristics of the instructions synchronization subsystem and takes advantages of SOC platform to perform the central control tasks. The whole subsystem is implemented as a 3U PXI peripheral card. The author designs the SOC on a FPGA chip, which includes a MIPS microprocessor core and the peripheral interfaces logic, and a PCB of the 3U PXI card. At last the author also analyzes the performance of this microprocessor and illustrates the results of the simulation about this SOC system.The significances and innovations of this thesis are as the follows.1. Firstly designing a full custom SOC system to perform highly real-time central control tasks in ICF experiment devices. This system is implemented as a 3U PXI card. The author designs a 32-bit 5-stage pipelined microprocessor with MIPS architecture to satisfy the physical diagnosis central control system's requirements. The performance of this microprocessor exceeds many commercial processor cores.2. Firstly employing the chip level design method in ICF experiment electronic device design. The author uses the high density, high performance FPGA chip to achieve all the custom digital systems logics including of the SOC system, central control logics of the PXI card and PCI interface logic. This method could improve the electronic device performance and integration level, simplify the PCB design and decrease the power dissipation.3. Firstly building the synchronous trigger subsystem and instructions synchronization subsystem for ICF experiments, which are based on standard PXI bus. The two subsystems can be centralized control and with high density and stability.