The Upgrade Of Data System For The J-TEXT Tokomak Experiment

Data system of fusion experiment is a useful tool to obtain diagnosis data,store and manage experiment data,which is an importance part of Tokamak. In this paper,the data systems of EAST,KSTAR,LHD and other Tokamaks are investigated and surveyed.According to this study and the features of J-TEXT Tokamak,we design and set up the four subsystems of the data system.there are data acquisition,data storage,data backup and data analysis.For satisfying the requirement of soft X ray diagnosis array's high-sampling data acquisition, This thesis built up a high-sampling synchronous data acquisition system based on the ACQ196 digitizer which is up to 500kS/s sampling rate and 16-bit input resolution.This thesis built up the redundancy disk of RAID6 mode array on analytical data storage demanding of the J-TEXT experiment,achieve a 9 TB experiment data storage system,built up a Tape Library based data backup system,carry out the big capacity experiment data's backup of the J-TEXT,Design the structure of data automatically analyze system and built up an result data tree.This thesis also studies the effect and coupling law of electromagnetic interference to the transmission line and data system under the circumstance of J-TEXT tokomak discharging,put the effective measures to suppress or reduce electromagnetic interference,such as shield room,filter,EMP restrain,isolation amplifier,optical fiber transmission,grounding technology,etc.Through the actual test of discharging, these repress measures,which have goodly repress effect to the electromagnetism interference,let up electromagnetism interference to the experiment signal, make the working of data system more stable and dependable.This thesis finally designed a more effect J-TEXT data system, and adopted appropriate repress measure of electromagnetism interference, raised the stability and credibility of the J-TEXT experiment data system.At the end of the thesis, the data system of J-TEXT's further direction of research and development are pointed out.