Theoretical Study on the Characteristics of Atmospheric Radio Frequency Discharges by Altering Electrode Gap

(匙阳阳), Chi Yangyang; Zhang, Yuantao

doi:10.1088/1009-0630/16/6/08

Cited by 3 publications

(3 citation statements)

References 28 publications

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“…Clearly, the form of the effective value is a root mean square (RMS) value. The power density P can be assumed to be P = f T 0 V(t)J 0 (t), where T is a circle [39,40]. The method for calculating effective power density is as the same as that used for effective current.…”

Section: Resultsmentioning

confidence: 99%

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Numerical Study of Ar/O2 Discharge Properties Influenced by Small Secondary Electron Emission in Dual-Frequency Atmospheric Pressure Discharge

Cui,

Wang,

Liu

2023

Applied Sciences

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A one-dimensional fluid model was employed to investigate the influence of the small secondary electron emission (SEE) coefficient on the characteristic properties of an Ar/O2 gas discharge at atmospheric pressure driven by a dual frequency source. The study includes basic physical quantities such as particle density, electron temperature, the electron heating mechanism, and energy loss. The research results illustrate that with an increase in the secondary electron emission coefficient, the electron density increases, while electron temperature and electric field decrease. The densities of various particles increase to different degrees, except for the metastable O2* molecule and the O atom. The density of the metastable O2* molecule and the density of the O atom are hardly affected by the SEE coefficient; however, the time required for both to reach steady state decreases. The time required for the electron density to reach steady state increases. Electron heating and energy loss increase to varying degrees when the SEE coefficient changes from 0.001 to 0.01.

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Section: Resultsmentioning

confidence: 99%

“…, where T is a circle [39,40]. The method for calculating effective power density is as the same as that used for…”

Section: Resultsmentioning

confidence: 99%

Numerical Study of Ar/O2 Discharge Properties Influenced by Small Secondary Electron Emission in Dual-Frequency Atmospheric Pressure Discharge

Cui,

Wang,

Liu

2023

Applied Sciences

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“…6(a), which suggests that the α-γ mode transition of RF discharge burst happens with a higher voltage and lower current at the duty cycle of 20%, compared to that at the duty cycle of 30%. It can be explained by the few RF cycles (2)(3) in the RF discharge burst with the modulation characteristics in terms of frequency at 900 kHz and duty cycle at 20% [11] . The RF discharge burst operates in the ignition phase, which also explains the stable operation of RF discharge burst in the γ mode at the duty cycle of 20%, as shown in Fig.…”

Section: Fig3 Waveforms Of Applied Voltage and Current During The Ramentioning

confidence: 99%

Operation Mode on Pulse Modulation in Atmospheric Radio Frequency Glow Discharges

Zhang

Ying

Huang

et al. 2016

Plasma Sci. Technol.

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The discharge operation regime of pulse modulated atmospheric radio frequency (RF) glow discharge in helium is investigated on the duty cycle and frequency of modulation pulses. The characteristics of radio frequency discharge burst in terms of breakdown voltage, alpha(α)gamma(γ) mode transition voltage and current are demonstrated by the discharge current voltage characteristics. The minimum breakdown voltage of RF discharge burst was obtained at the duty cycle of 20% and frequency of 400 kHz, respectively. The α-γ mode transition of RF discharge burst occurs at higher voltage and current by reducing the duty cycle and elevating the modulation frequency before the RF discharge burst evolving into the ignition phase, in which the RF discharge burst can operate stably in the γ mode. It proposes that the intensity and stability of RF discharge burst can be improved by manipulating the duty cycle and modulation frequency in pulse modulated atmospheric RF glow discharge.

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Effects of electrode gap on radio-frequency discharge characteristics with a hollow electrode

Ouyang

et al. 2020

Physics of Plasmas

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In this paper, the effects of electrode gap on the discharge characteristics in low-pressure argon radio frequency (RF) discharge with a hollow electrode were investigated by a two-dimensional particle-in-cell/MCC model. The results show that the time-averaged electric field, electron density, sheath potential drop, and sheath thickness change with the increasing electrode gap. It is also found that the electron density varies non-monotonically with the electrode gap increasing from 4 to 12 mm due to the different intensities of the hollow cathode effect (HCE) and electron heating at different electrode gaps. The axial sheath at the bottom of the hollow electrode is found to determine the depth of the plasma in the hole and can significantly modulate the intensities of the HCE and electron heating. With the reducing electrode gap, the hole of the hollow electrode is eventually filled with the sheath, and the bulk plasma region is compressed. The results indicate that a small electrode gap is not beneficial to obtain large area plasma with high density outside the hole. Altering the electrode gap can tailor the spatial distribution of the plasma in the RF discharge with a hollow electrode and obtain an optimal electron density.

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Theoretical Study on the Characteristics of Atmospheric Radio Frequency Discharges by Altering Electrode Gap

Cited by 3 publications

References 28 publications

Numerical Study of Ar/O2 Discharge Properties Influenced by Small Secondary Electron Emission in Dual-Frequency Atmospheric Pressure Discharge

Numerical Study of Ar/O2 Discharge Properties Influenced by Small Secondary Electron Emission in Dual-Frequency Atmospheric Pressure Discharge

Operation Mode on Pulse Modulation in Atmospheric Radio Frequency Glow Discharges

Effects of electrode gap on radio-frequency discharge characteristics with a hollow electrode

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