Development of Timing Node on EAST Neutral Beam Injector

Neutral beam injection (NBI) heating is one of the most efficient auxiliary plasma heating methods for fusion devices. The development of timing node (TN) for NBI system in the experimental advanced superconducting tokamak (EAST) is presented in this paper. AS an important sub-system, TN is designed to provide a unified clock for all sub-systems of NBI, control the input/output services of digital and analog signals, realize failsafe and latch the trouble signals, and control DC/AC output of high voltage power supply system. The timing node is developed on a PXI (PCI eXtensions for Instrumentation) platform consisting of a LabVIEW workstation and a timing control terminal. The architecture and implementation of TN are presented in this paper.