2-D Simulation of the Electron Density Characteristics of a Special Plasma Device

Deng, Weifeng; Liu, Yanming; Jia, Zhang; Yang, Min; Ouyang, Wenchong

doi:10.1109/tps.2021.3079340

Cited by 8 publications

(4 citation statements)

References 22 publications

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“…The UWB constant beam antenna is used for diffraction measurement of cylindrical plasma. The attenuation of microwaves by plasma can be obtained by formulas (3)- (9). In order to obtain the diffraction of electromagnetic waves to plasma.…”

Section: Test Of Diffraction By Electromagnetic Wave On Metal Column ...mentioning

confidence: 99%

“…Generally, the plasma parameter diagnosis methods include the Langmuir probe method [6][7][8][9], laser interferometry [10][11][12], spectroscopy diagnosis method [13,14], microwave diagnosis method [15][16][17][18][19], and so on. Each method has a certain scope of application and limitations.…”

Section: Introductionmentioning

confidence: 99%

“…The spectroscopy method is unable to obtain the electron density distribution. The Langmuir probe method [6][7][8][9] is to penetrate the probe deep into the plasma, so that the electron density at different positions can be diagnosed. However, in a plasma with a higher temperature, the probe is easily burned out, and the change in the plasma cannot be measured for a long time.…”

Section: Introductionmentioning

confidence: 99%

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Research on plasma electron density distribution based on microwave diffraction

Zhao¹,

Li²,

Liu³

et al. 2022

Plasma Sources Sci. Technol.

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In this paper, a non-contact plasma microwave diffraction measurement method is proposed, which can obtain the electron density at different diameters of the cylindrical plasma. There is a lot of diffraction when a non-focused antenna is used to transmit plasma. As we all know, when the frequency of the incident microwave is lower than the characteristic frequency of the plasma, the microwave cannot be transmitted through the plasma, so this interface can be regarded as a metal. According to the microwave diffraction of the plasma, the size of the plasma correspond-ing to the characteristic frequency can be obtained. Furthermore, by sweeping the incident elec-tromagnetic wave, the size of plasma with different characteristic frequencies can be obtained, and the distribution of electron density can be obtained. To verify the method, a cylindrical plasma was measured by microwave diffraction, in which the electron density of the plasma column gradually decreased along the increase in radius. According to the diffraction of the plasma column at different frequencies, the distribution of the electron density along the diame-ter is obtained. And compared with the transmission diagnosis method, the validity and accuracy of this method are verified. In non-uniform high-temperature plasma, the diffraction method greatly improves the accuracy of spatial diagnosis compared with traditional transmission diag-nosis.

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Section: Test Of Diffraction By Electromagnetic Wave On Metal Column ...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Research on plasma electron density distribution based on microwave diffraction

Zhao¹,

Li²,

Liu³

et al. 2022

Plasma Sources Sci. Technol.

Self Cite

View full text Add to dashboard Cite

show abstract

“…Using the Thomson scattering and electric field-induced second harmonic methods, Li et al [24] found that the brightness of plasma plumes in different states is mainly controlled by electron temperature rather than electron density. Deng et al developed a hybrid model to study the effects of different powers, pressures, frequencies, and gases on the electron density distribution in a capacitively coupled plasma device [25]. Yugeswaran and Selvarajan studied the excitation temperature and electron density of argon plasma jets during nickel spheronisation.…”

Section: Introductionmentioning

confidence: 99%

Influence of operating conditions on electron density in atmospheric pressure helium plasma jets

Xu,

Lu,

Yue

et al. 2023

J. Phys. D: Appl. Phys.

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In recent years, atmospheric-pressure plasma jets (APPJs) have emerged as valuable tools in many application areas, including material modification, environmental remediation and biomedicine. Understanding the discharge characteristics of these plasma jets under various operating conditions is crucial for optimizing process outcomes. This paper presents a two-dimensional fluid model for numerical simulation to study the variation in electron density within an atmospheric-pressure helium plasma jet under different operating conditions. The investigated parameters include helium gas flow rate, voltage amplitude, needle-to-ring discharge gap, and relative permittivity of the dielectric tube. The results reveal that the peak electric field and electron density initially occur at the wall of the dielectric tube and subsequently shift towards the head of the propagating jet. Gas flow rate has minimal impact on the electron density throughout the plasma jet, whereas increasing the needle-to-ring discharge gap significantly decreases the average electron density within the jet. In addition, an increase in the voltage amplitude and the relative permittivity of the dielectric tube enhances the electric field within the discharge space, thereby increasing the electron density in the plasma jet. These findings underscore the importance of understanding the correlation between electron density and operating conditions to precisely control plasma jets and enhance material treatment effectiveness for specific applications.

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Measurement on electron density of high-power and large-volume ICP-heated wind tunnel with HCN laser interferometer

et al. 2022

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This paper explains the physical behavior of the electron density of high-power and large-volume plasma wind tunnel using a single channel hydrogen cyanide (HCN) laser interferometer. Based on the characteristics of inductively coupled plasma (ICP)-heated wind tunnel, the temperature and pressure distribution of the ICP-heated wind tunnel are obtained from numerical simulations, during which the influence of neutral particles is considered to calculate the accurate electron density. The typical electron density order of ICP-heated wind tunnel is [Formula: see text]. We discovered that there is a positive correlation between the electron density of argon plasma jet and mass flow rate, while that of air plasma jet decreases slightly. We also found that the peak of electron density appears when the argon is switched to air. Within the voltage range of 6–10 kV, the electron density of argon and air plasma increases slowly. However, when the voltage increases from 10 to 12 kV, the electron density of air plasma increases sharply with the mass flow rate of 15 g/s. Finally, the electron density of argon plasma is much higher than that of air plasma at the same mass flow rate and voltage.

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2-D Simulation of the Electron Density Characteristics of a Special Plasma Device

Cited by 8 publications

References 22 publications

Research on plasma electron density distribution based on microwave diffraction

Research on plasma electron density distribution based on microwave diffraction

Influence of operating conditions on electron density in atmospheric pressure helium plasma jets

Measurement on electron density of high-power and large-volume ICP-heated wind tunnel with HCN laser interferometer

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