EAST Real-Time VOD System Based on MDSplus

TL;DR

This paper presents a real-time video on demand system integrated with MDSplus for EAST tokamak experiments, enabling efficient storage, retrieval, and analysis of plasma discharge videos in real time.

Contribution

The system uniquely combines real-time video access with MDSplus database integration, improving data management and analysis for EAST experiments.

Findings

Enables real-time video frame reading and analysis.

Improves data access and backup during EAST experiments.

Enhances real-time performance over previous systems.

Abstract

As with EAST (Experimental Advanced Superconducting Tokamak) experimental data analyzed by more and more collaborators, the experimental videos which directly reflect the real status of vacuum attract more and more researchers' attention. The real time VOD (Video On Demand) system based on MDSplus allows users reading the video frames in real time as same as the signal data which is also stored in the MDSplus database. User can display the plasma discharge videos and analyze videos frame by frame through jScope or our VOD web station. The system mainly includes the frames storing and frames displaying. The frames storing application accepts shot information by using socket TCP communication firstly, then reads video frames through disk mapping, finally stores them into MDSplus. The displaying process is implemented through B/S (Browser/Server) framework, it uses PHP and JavaScript to realize VOD function and read frames information from MDSplus. The system offers a unit way to access and backup experimental data and video during the EAST experiment, which is of great benefit to EAST experimenter than the formal VOD system in VOD function and real time performance.