Research And Software Development Of EAST Signal Visualization And Data Processing

With the development of experimental research of EAST,a large amount of engineering data and diagnostic data are produced.Effective management of nuclear fusion experimental data is required to provide a convenient way for physicist to analyze and process data.The experimental data platform of existing EAST cannot monitor huge amounts of data.In addition,the system can hardly judge the engineering stability of EAST equipment in real time.Therefore,a new real-time monitoring and data processing platform for engineering signals is needed,which not only can effectively monitor engineering signals,but also can be used for scientific management and analysis of massive experimental data.It is convenient for the experimenter to judge the running status of the device host through the signal waveform and analysis result released by the platform to ensure the smooth progress of the experiment.This paper mainly studies the data storage,data visualization and data analysis of EAST nuclear fusion experimental data.The specific content and research results of this paper are as follows:1.This paper presents a new Java web application that creates a system combined signal real-time monitoring and EAST magnet stability judgment by automatically writing Java Server Pages(JSP)and JavaScript code.The system is composed of three modules: data visualization,data monitoring and offline data analysis.The data visualization and monitoring modules are Java-based open source architecture and Highcharts display module,whose data are obtained from MDSplus.2.EAST aims at multi-system long pulse data acquisition.The experimental device consists of different subsystems,whose data acquisition sampling rates,acquisition time and duration of each experimental discharge are different.Therefore,it is important to consider not only how to unify the scattered acquisition data,but also obtain the engineering experimental data online,which can be visually analyzed and displayed during the discharge.3.The monitoring of massive data for EAST device is also of great concern to scientific experimenters.Generally,a program is developed to carry out unattended operation of the monitoring system,including data acquisition subsystem,data analysis subsystem and signal alarm subsystem.This program can not only transmit the data synchronously from database to the monitoring system but also give feedback information of Tokamak's alarms to the users automatically,which focuses on the real-time monitoring.4.The AC loss of PF coils and EM loads of the magnet are calculated by secondary operation on the obtained data,which are used to judge the operation status of the whole EAST magnet system.The EM loads and AC loss are important factors to judge the stability of the EAST magnet system,which can be obtained by a linear transform of given currents using the pre-computed interaction matrix.Based on this technology,the calculating algorithm for EAST is then developed using Java programming.Figure [50] table [5] reference [52]...