Development and application of network virtual instrument for emission spectrum of pulsed high-voltage direct current discharge

Abstract

Network virtual instrument (VI) is a new development direction in current automated test. Based on LabVIEW, the software and hardware system of VI used for emission spectrum of pulsed high-voltage direct current (DC) discharge is developed and applied to investigate pulsed high-voltage DC discharge of nitrogen. By doing so, various functions are realized including real time collection of emission spectrum of nitrogen, monitoring operation state of instruments and real time analysis and processing of data. By using shared variables and DataSocket technology in LabVIEW, the network VI system based on field VI is established. The system can acquire the emission spectrum of nitrogen in the test site, monitor operation states of field instruments, realize real time face-to-face interchange of two sites, and analyze data in the far-end from the network terminal. By employing the network VI system, the staff in the two sites acquired the same emission spectrum of nitrogen and conducted the real time communication. By comparing with the previous results, it can be seen that the experimental data obtained by using the system are highly precise. This implies that the system shows reliable network stability and safety and satisfies the requirements for studying the emission spectrum of pulsed high-voltage discharge in high-precision fields or network terminals. The proposed architecture system is described and the target group gets the useful enlightenment in many fields including engineering remote users, specifically in controland automation-related tasks. K: Control systems; Hardware and accelerator control systems; Software architectures (event data models, frameworks and databases); Ion identification systems 1Corresponding author.

Overview of HL-2A recent experiments

“…A CO 2 dispersion interferometer [50] and a high sensitivity far-infrared laser interferometer [23] were developed for measuring the line-averaged density in time. The diagnostics for measuring density fluctuation were developed, including phase contrast imaging [51][52][53], beam emission spectroscopy [54,55] and He gas-puff imaging [56].…”