研究目的
Exploring the instabilities of filament movement in an RF argon plasma jet at atmospheric pressure using high-speed camera imaging.
研究成果
The study successfully visualized two types of filament instabilities in an RF argon plasma jet, depending on the azimuthal velocities of the filaments. The observations contribute to the understanding of nonlinear effects in nonthermal plasma discharges and suggest potential applications in plasma materials processing.
研究不足
The study is limited to observations of filament instabilities in an RF argon plasma jet under specific conditions of gas flow and RF power. The findings may not be directly applicable to other types of plasma discharges or under different operational parameters.
1：Experimental Design and Method Selection:
The experiment involved using a nonthermal atmospheric pressure plasma jet operated with RF electric field at 27.12 MHz. High-speed camera imaging at 10,000 frames/s was used to observe filament instabilities.
2：12 MHz. High-speed camera imaging at 10,000 frames/s was used to observe filament instabilities.
Sample Selection and Data Sources:
2. Sample Selection and Data Sources: The plasma source consisted of a quartz tube with two ring electrodes, with argon gas flow rates between 100 and 600 cm3 and power supplied to the plasma between 4.5 and 6.5 W.
3：5 and 5 W.
List of Experimental Equipment and Materials:
3. List of Experimental Equipment and Materials: REDLAKE MotionXtra HG-100K high-speed camera, quartz tube with ring electrodes, central capillary for gas supply.
4：Experimental Procedures and Operational Workflow:
The high-speed camera was used to capture frame sequences at 10,000 frames/s with an exposure time of 95 μs per frame. Selected frame sequences were colored with false rainbow colors projected linearly on the time scale.
5：Data Analysis Methods:
The stroboscopic image resulted from the linear compilation of particular frames to visualize spatially and temporally resolved features.
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