Driving frequency effects on the characteristics of atmospheric pressure capacitive helium discharge

2008 ◽  
Vol 93 (22) ◽  
pp. 221506 ◽  
Author(s):  
Se Youn Moon ◽  
D. B. Kim ◽  
B. Gweon ◽  
W. Choe
Keyword(s):  
Atmospheric Pressure ◽  
Driving Frequency ◽  
Frequency Effects ◽  
Helium Discharge

The driving frequency effects on the atmospheric pressure corona jet plasmas from low frequency to radio frequency

2011 ◽  
Vol 18 (4) ◽  
pp. 043503 ◽  
Author(s):  
Dan Bee Kim ◽  
H. Jung ◽  
B. Gweon ◽  
S. Y. Moon ◽  
J. K. Rhee ◽  
...  
Keyword(s):  
Radio Frequency ◽  
Atmospheric Pressure ◽  
Low Frequency ◽  
Driving Frequency ◽  
Frequency Effects

Effects of HF frequency on plasma characteristics in dual-frequency helium discharge at atmospheric pressure by fluid modeling

2018 ◽  
Vol 20 (11) ◽  
pp. 115402
Author(s):  
Yinan WANG ◽  
Shuaixing LI ◽  
Li WANG ◽  
Ying JIN ◽  
Yanhua ZHANG ◽  
...  
Keyword(s):  
Atmospheric Pressure ◽  
Dual Frequency ◽  
Fluid Modeling ◽  
Plasma Characteristics ◽  
Helium Discharge

scholarly journals Determination of Helium-Discharge Atmospheric-Pressure Plasma Parameters and Distribution Using Numerical Simulation

2021 ◽  
Vol 16 (0) ◽  
pp. 2401060-2401060
Author(s):  
Kladphet THANET ◽  
Wannakuwaththawaduge T. L. S. FERNANDO ◽  
Kazumasa TAKAHASHI ◽  
Takashi KIKUCHI ◽  
Toru SASAKI
Keyword(s):  
Numerical Simulation ◽  
Atmospheric Pressure ◽  
Atmospheric Pressure Plasma ◽  
Plasma Parameters ◽  
Pressure Plasma ◽  
Helium Discharge

The effects of the driving frequencies on micro atmospheric pressure He/N2 plasma jets driven by tailored voltage waveforms

2021 ◽  
Author(s):  
Gerrit Hübner ◽  
Lena Bischoff ◽  
Ihor Korolov ◽  
Zoltan Donkó ◽  
Marc Leimkühler ◽  
...  
Keyword(s):  
Atmospheric Pressure ◽  
Operation Mode ◽  
Atmospheric Pressure Plasma ◽  
Dissociation Rate ◽  
Plasma Jets ◽  
Single Frequency ◽  
Driving Voltage ◽  
Driving Frequency ◽  
Power Absorption ◽  
Capacitively Coupled

Abstract Capacitively coupled micro atmospheric pressure plasma jets (µAPPJs) are important tools for the generation of radicals at room temperature for various applications. Voltage Waveform Tailoring (VWT), which is based on the simultaneous use of a set of excitation frequencies has been demonstrated to provide an efficient control of the Electron Energy Probability Function (EEPF) in such plasmas and, thus, allows optimizing the electron impact-driven excitation and dissociation processes as compared to the classical single-frequency operation mode. In this work, the effects of changing the driving frequencies on the spatio-temporally resolved electron power absorption dynamics, the generation of helium metastables and the dissociation of nitrogen molecules are investigated in He/N2 plasmas based on experiments and simulations. We find that under a single-frequency excitation, the plasma and helium metastable densities are enhanced as a function of the driving frequency at a fixed voltage. When using peaks-type driving voltage waveforms synthesized based on consecutive harmonics of the fundamental driving frequency, the spatial symmetry of the electron power absorption dynamics and of the metastable density profile is broken. Increasing the fundamental frequency at a constant voltage is found to drastically enhance the plasma and metastable densities, which is a consequence of the change of the EEPF. Finally, we compare the energy efficiency of the formation of radicals under single-frequency and VWT operation at different driving frequencies. For a given power dissipated in the plasma, VWT yields a higher helium metastable as well as electron density and a higher dissociation rate of N2.

Numerical simulation of atmospheric-pressure helium discharge driven by combined radio frequency and trapezoidal pulse sources

2010 ◽  
Vol 17 (5) ◽  
pp. 053506 ◽  
Author(s):  
Qi Wang ◽  
Jizhong Sun ◽  
Jianhong Zhang ◽  
Zhenfeng Ding ◽  
Dezhen Wang
Keyword(s):  
Numerical Simulation ◽  
Radio Frequency ◽  
Atmospheric Pressure ◽  
Helium Discharge ◽  
Trapezoidal Pulse
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