Numerical simulation of operation modes in atmospheric pressure uniform barrier discharge excited by a saw-tooth voltage

Li, Xuechen; Niu, Dongying; Yin, Zengqian; Fang, Tongzhen; Long, Wang

doi:10.1063/1.4745653

Cited by 19 publications

(7 citation statements)

References 19 publications

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“…Except the plasma plume, these characteristic regions are similar with those found in glow discharges at low pressure, and those in APUD excited by sinusoidal voltage [27] or saw-tooth voltage. [28] Furthermore, the voltage-current characteristic is also similar with that of the glow discharge at low pressure, as shown in Fig. 3.…”

Section: Resultssupporting

confidence: 63%

Characteristics of a large gap uniform discharge excited by DC voltage at atmospheric pressure

Li¹,

Bao²,

Jia³

et al. 2014

Chinese Phys. B

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A large-gap uniform discharge is ignited by a coaxial dielectric barrier discharge and burns between a needle anode and a plate cathode under a low sustaining voltage by feeding with flowing argon. The basic aspects of the large-gap uniform discharge are investigated by optical and spectroscopic methods. From the discharge images, it can be found that this discharge has similar regions with glow discharge at low pressure except a plasma plume region. Light emission signals from the discharge indicate that the plasma column is invariant with time, while there are some stochastic pulses in the plasma plume region. The optical emission spectra scanning from 300 nm to 800 nm are used to calculate the excited electron temperature and vibrational temperature of the large-gap uniform discharge. It has been found that the excited electron temperature almost keeps constant and the vibrational temperature increases with increasing discharge current. Both of them decreases with increasing gas flow rate.

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Section: Resultssupporting

confidence: 63%

Characteristics of a large gap uniform discharge excited by DC voltage at atmospheric pressure

Li¹,

Bao²,

Jia³

et al. 2014

Chinese Phys. B

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“…The presence of a layer of insulation in front of the electrode reduces avalanche multiplication, prevents arc formation, and thus stabilizes the discharge. APNP generated by DBD in a parallel electrode configuration using helium [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17], nitrogen [18][19][20][21][22], and He-N 2 mixtures [23][24][25][26][27][28][29][30] as the working gas has been extensively studied. Discharge is stable for a limited set of input parameters [17].…”

Section: Introductionmentioning

confidence: 99%

Systematic investigation of the effect of N₂ admixture ratio on barrier discharge in helium

Pervez¹,

Ishijima²,

Begum³

et al. 2018

J. Phys. D: Appl. Phys.

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The influence of the N 2 admixture ratio on a He-N 2 uniform atmospheric pressure glow discharge (APGD) generated using an asymmetric 20 µs, 10 kHz bipolar applied voltage pulse is systematically investigated, using electrical and optical emission spectroscopic measurements as diagnostic tools. We focused our investigation on understanding the discharge characteristics of the plasma ignited after an off-voltage period of 80 µs duration. The measured breakdown voltages for various N 2 admixture ratios of up to 3% are compared with a theoretically calculated breakdown voltage, taking into account the secondary electron emission coefficient of the dielectric surface. The results indicate that the value of the secondary emission coefficient should increase from 0.1 to 0.5 to realize the experimentally obtained breakdown voltage variation within a 3% N 2 admixture ratio. Using experimentally obtained values of the breakdown voltage, discharge current densities for different N 2 admixture ratios, and 66 reactions among electrons, helium and N 2 , the variations of the N 2 (A), N 2 (C) and N + 2 (B) state densities with N 2 admixture ratio are calculated. The N 2 admixture ratio dependence of the calculated N 2 (C) and N + 2 (B) state densities are similar to the N 2 admixture ratio dependences of the emission intensities of the 337 nm band of the N 2 second positive system (SPS) and the 391.4 nm band of the N + 2 first negative system, respectively. Experimental observation and numerical investigation indicates that below a 1% N 2 admixture ratio, the He (2 3 S) metastable state has a strong influence on the discharge characteristics, and above a 2% N 2 admixture ratio, the N 2 (A) metastable state influences the discharge behavior. The N 2 (A) metastable state density is estimated experimentally using the emission intensity ratio of the 337 nm band of N 2 SPS and the 247 nm band of a NO-γ system. The experimentally estimated and theoretically calculated value of N 2 (A) metastable state density is of the same order of 10 13 cm −3 . The estimated N 2 (A) metastable state density shows a rapid increase above a 2% N 2 admixture ratio, which supports the idea that the secondary emission coefficient increases due to an increase in N 2 (A) flux.

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“…Although a high duty-ratio APGD excited by a saw-tooth voltage was reported in Ref. [10], very stringent conditions were needed, otherwise, the discharge would transit to a pulsed discharge. Apparently, APGD with a constant discharge current had a maximum of temporal duty cycle.…”

Section: Introductionmentioning

confidence: 99%

Characteristics of a Normal Glow Discharge Excited by DC Voltage in Atmospheric Pressure Air

Li¹,

Zhao²,

Jia³

2013

Plasma Sci. Technol.

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Atmospheric pressure glow discharges were generated in an air gap between a needle cathode and a water anode. Through changing the ballast resistor and gas gap width between the electrodes, it has been found that the discharges are in normal glow regime judged from the currentvoltage characteristics and visualization of the discharges. Results indicate that the diameter of the positive column increases with increasing discharge current or increasing gap width. Optical emission spectroscopy is used to calculate the electron temperature and vibrational temperature. Both the electron temperature and the vibrational temperature increases with increasing discharge current or increasing gap width. Spatially resolved measurements show that the maxima of electron temperature and vibrational temperature appeared in the vicinity of the needle cathode.

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Numerical simulation of operation modes in atmospheric pressure uniform barrier discharge excited by a saw-tooth voltage

Cited by 19 publications

References 19 publications

Characteristics of a large gap uniform discharge excited by DC voltage at atmospheric pressure

Characteristics of a large gap uniform discharge excited by DC voltage at atmospheric pressure

Systematic investigation of the effect of N₂ admixture ratio on barrier discharge in helium

Characteristics of a Normal Glow Discharge Excited by DC Voltage in Atmospheric Pressure Air

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Numerical simulation of operation modes in atmospheric pressure uniform barrier discharge excited by a saw-tooth voltage

Cited by 19 publications

References 19 publications

Characteristics of a large gap uniform discharge excited by DC voltage at atmospheric pressure

Characteristics of a large gap uniform discharge excited by DC voltage at atmospheric pressure

Systematic investigation of the effect of N2 admixture ratio on barrier discharge in helium

Characteristics of a Normal Glow Discharge Excited by DC Voltage in Atmospheric Pressure Air

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Systematic investigation of the effect of N₂ admixture ratio on barrier discharge in helium