Nanosecond pulse-driven dielectric barrier discharge arbitrary-moment surface charge observation system

Abstract

The invention discloses a nanosecond pulse-driven dielectric barrier discharge arbitrary-moment surface charge observation system, which comprises a helium-neon laser source, a light path output end of the helium-neon laser source is sequentially provided with a light beam amplifier, a diaphragm and a polarization beam splitter, wherein a light beam of the laser source is divided into two paths through the polarization beam splitter, one path enters the dielectric barrier discharge unit through the 1 / 8 wave plate, and the other path enters the camera framing unit through the convex lens and the small hole. The camera framing unit is connected with three ICCD cameras so as to realize surface charge observation at any discharge moment; the three ICCD cameras are respectively connected with the digital oscilloscope, the nanosecond pulse power supply and the computer; the nanosecond pulse power supply is connected with a digital delay generator, the digital oscilloscope is connected with a high-voltage probe, and the digital oscilloscope is connected with the near end of the dielectric barrier discharge unit; the output end of the high-voltage probe and the output end of the nanosecond pulse power supply are connected with the far end of the dielectric barrier discharge unit. And the action mechanism of the surface charge on the nanosecond pulse DBD can be perfected.

Description

technical field [0001] The invention belongs to the field of nanosecond pulse dielectric barrier discharge, relates to an observation system driven by nanosecond pulse voltage, in particular to a nanosecond pulse driven dielectric barrier discharge observation system for surface charge at any time. Background technique [0002] With the development of pulse power technology, scientific research has found that dielectric barrier discharge (Dielectric Barrier Discharge, DBD) under pulse voltage has higher discharge stability than traditional AC voltage drive, active particle density and energy conversion efficiency and can The generation of large-volume low-temperature plasma under atmospheric pressure conditions has great application prospects in thin film deposition, surface modification, ozone generation, and gas and water purification. Since the nanosecond pulse has a steep rising edge and short voltage action time, and the discharge current is only generated at the rising...

AI Technical Summary

Problems solved by technology

At present, the experimental discharge in nanosecond pulse DBD is mainly based on the measurement of discharge characteristics and discharge images under the macroscopic view, but there are few reports on the observation of the surface charge of the medium in the discharge air gap, that is, the mechanism of surface charge on nanosecond pulse DBD is still unknown. Not sure, need to carry out corresponding experimental research

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