Using Shared Memory For East-Nbi Control Server Application Software

Neutral Beam Injector (NBI) is a main plasma heating method for Experimental Advanced Superconducting Tokamak (EAST). In order to monitor the NBI experiment, control all the power supplies, realize the data acquisition and network, NBI control system is designed. As the center of the control system, control server plays a crucial role that can control the input and output of the whole NBI system, verify whether the experimental parameters of NBI system are reasonable, monitor the states of the experimental equipments in real time, storage the real-time data and make it easy to perform self-protection and alarm automatically. This design is related to many kinds of technologies, such as shared memory, multithreading, TCP protocol and so on. Shared memory is the critical technique of the control server application software which improves the system operational efficiency in processing the rapidly changing data and sharing the data of EAST-NBI.