Abstract
In order to achieve high parameters operation on experimental advanced superconducting tokamak in future experiments, a new 6 MW/4.6 GHz lower hybrid current drive (LHCD) system has been finished in September 2013. The new system consists of 24 klystrons, and each is able to deliver up to 250 kW power at 4.6 GHz in continuous wave mode for 1000 s. It is a challenge to develop long pulse data acquisition for the LHCD system. The PCI eXtensions for Instrumentation based digitizers are adopted as the acquisition devices and an event-callback mechanism is formulated to fulfill the long pulse data acquisition. Various kinds of the acquired data are stored in unified text file format. A MySQL relational database based file server is launched to manage the text files while providing web service. Finally, a layer based monitoring subsystem is designed and proves feasible.
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