  EAST (Experimental Advanced Superconducting Tokamak) Technical Diagnostic
System (TDS) is used to monitor the outlet temperature of all superconducting
coils, in case of temperature anomaly, it will trigger safety interlock system
to meet EAST device safety. The data acquisition system of TDS is in charge of
continuous data acquisition of the nitrogen and helium temperature signals, TDS
security alarm and long-term data storage. It supports continuous data
acquisition and pulse data acquisition. The data acquisition of the nitrogen
temperature signals is based on the PXI technology while obtaining the helium
temperature signals from Lake Shore model 224 temperature monitors with VISA
standard. After data conversion, all the data will be stored in MySQL and
MDSPlus for long-term storage. It should output TDS fault signal and status
signal to trigger the safety interlock system to take actions after threshold
evaluation of key temperature signals. It publishes part of real-time TDS data
to the cryogenic system and provides an information inquiry service to the TDS
administrator. The system has been used in 2018 EAST campaign.
