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Jiamin Zhang, Yuan Yao, Yuyang Liu, Yuqi Chu, Yao Zhang, Tianyi Ruan, Haiqing Liu, Yinxian Jie, Bili Ling. Real-Time Data Processing Method for CO2 Dispersion Interferometer on EAST[J]. Plasma Science and Technology. DOI: 10.1088/2058-6272/ad4597
Citation: Jiamin Zhang, Yuan Yao, Yuyang Liu, Yuqi Chu, Yao Zhang, Tianyi Ruan, Haiqing Liu, Yinxian Jie, Bili Ling. Real-Time Data Processing Method for CO2 Dispersion Interferometer on EAST[J]. Plasma Science and Technology. DOI: 10.1088/2058-6272/ad4597

Real-Time Data Processing Method for CO2 Dispersion Interferometer on EAST

  • In this paper, a real-time data processing system is designed for the carbon dioxide dispersion interferometer (CO<sub>2</sub>-DI) on EAST to measure electron density and provide real-time feedback control. The system utilizes the parallel and pipelining capabilities of Field-Programmable Gate Array (FPGA) to digitize and process the intensity of signals from the detector. Finally, the real-time electron density signals are exported through a Digital-to-Analog Converter (DAC) module in the form of analog signals. The system has been successfully applied in the CO<sub>2</sub>-DI system to provide low-latency electron density data to the plasma control system on EAST. Experimental results of the latest campaign with long-pulse discharges on EAST (2022-2023) demonstrate that the system can respond effectively in the case of rapid density changes, which means it is reliable and accurate for future electron density calculation.
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