研究目的
Investigating the instabilities of filament movement in an RF argon plasma jet at atmospheric pressure and the self-organization effect of filaments.
研究成果
The study successfully visualized two types of filament instabilities in an RF argon plasma jet, leading to either fusion of filaments with striated structures or symmetric patterning and steady rotation. These findings 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 power. The findings may not be directly applicable to other types of plasma discharges or conditions.
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 sequences of filament movements, with exposure time for one frame at 95 μs. 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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