ZH-1 Satellite HEPP-L Detector Readout System

Space charged particle detector is one of the principal means of space study, both at home and abroad, earthquake monitoring and prediction research has demonstrated that magnetosphere and ionosphere electromagnetic precursor monitoring has become one of the most effective short-term and imminent earthquake monitoring instruments breakthrough, it has great significance for promoting earthquake prediction. High energy particle detector HEPP is one of the main payload of the electromagnetic monitoring satellites, Its main goal is to realize the incident direction and energy of charged particle measurements, which in orbit about 500 km from the Earth’s surface. And with the Space electromagnetic measurements, Looking for possible associations between the flux of high-energy particles in space and electromagnetic radiation by Earth-related activities on the Earth’s surface. According to the different of the particle’s energy range and type, High energy particle detector can be divided into low energy HEPP-L and high energy HEPP-H and Solar x-ray monitor three part, This paper is the study of the readout system of the low energy loads HEPP-L detector.Thesis topic derived from the Chinese Academy of Sciences, Institute of high energy physics (IHEP) aerospace engineering project:electromagnetic monitoring satellites high energy particle detector. Domestic main particle detectors are measuring different particle flux of information, does not have the energy spectrum and angular measurement capability. Space low-energy charged particle detector, using semiconductor detectors, international, there are multiple instances. Point for particle identification and measurement needs, using a telescope array design forms. DEMETER is to complete the electromagnetic radiation detection in a seismic zone, has observed a class of relationship between low-frequency electromagnetic activity and active seismic zone.The content of this article is HEPP-L detector readout system. Detectors need to be considered, several semiconductor detector performance analysis, and based on analysis of the design principle of foreign probes and requirements of electromagnetic monitoring satellites on high energy particle detector, Silicon detector telescope element array be used on HEPP-L detector to achieve position measurement, angle measurement and energy measurement of the charged particles. Through the per unit length differences ionization energy loss of the electron and proton in the same material, Using δ-E-E methods for identification of electrons and protons. While in the detector using plastic scintillator as anticoincidence detector at the bottom, excluded more than charged particles of energy measurement range and from the bottom of the incident particle.The readout system of particle physics studied in this paper are to measuring the information carried by the signal of detector, For example, after the occurrence of a particular effective particle injection and output the total amount of charge detector unit. This measurement is from a dynamic perspective, is the current points of time measurement. HEPP-L detector basic measurement program is the charge-voltage conversion program, and consider using hash components consisting readout system, rather than using ASIC chip read. In order to verify the feasibility of the plan and could meet the requirement and the power requirements, we design a single silicon detector readout. It consists of hardware and software control sequence design, using a Xilinx FPGA Development Board debug through. Based on a single channel verify circuit, extending it to 18-9 Telescope unit arrays of Silicon detector readout system, matching up the other hardware parts of the detector probe, Composition readout electronics system of HEPP-L detector. this system also contains the hardware circuit design and FPGA software, this component is the focus of this paper.