Study on the Analytical Solution of Electron Number Density and Impedance of α Mode Helium Radio-Frequency Atmospheric Pressure Glow Discharges

2017 ◽  
Author(s):  
Wang Hao ◽  
Jiao Junkai ◽  
Luo Haiyun ◽  
Wang Xinxin
Keyword(s):  
Analytical Solution ◽  
Radio Frequency ◽  
Atmospheric Pressure ◽  
Electron Number Density ◽  
Number Density ◽  
Electron Number ◽  
Glow Discharges

scholarly journals Comparison of the Plasma Temperature and Electron Number Density of Pulsed Electrolyte Cathode Atmospheric Pressure Discharge and Direct Current Solution Cathode Glow Discharge

2018 ◽  
Author(s):  
Jinmei Wang ◽  
Shiyu Li ◽  
Peichao Zheng ◽  
Yanying Chen
Keyword(s):  
Glow Discharge ◽  
Atmospheric Pressure ◽  
Electron Number Density ◽  
Number Density ◽  
Electron Number ◽  
Discharge System ◽  
Flowing Liquid ◽  
Pressure Discharge ◽  
Atmospheric Pressure Discharge ◽  
Electrolyte Cathode

A novel plasma source of pulsed electrolyte cathode atmospheric pressure discharge (pulsed-ECAD) driven by an alternating current (AC) power supply coupled with a high voltage diode was generated, and the discharge was generated in the open-to-air atmosphere between a metal electrode and a small-sized flowing liquid cathode. The spatial distribution of plasma temperatures (excitation, vibrational and rotational) of the pulsed-ECAD were investigated. The electron excitation temperature of H Texc(H), vibrational temperature of N2 Tvib(N2), and rotational temperature of OH Trot(OH) were measured as 4900±36-6800±108 K, 4600±86-5800±100 K and 1050±20-1140±10 K, respectively. Meanwhile, the temperature characteristics of dc solution cathode glow discharge (dc-SCGD) were also studied for comparison with pulsed-ECAD. The effects of operating parameters, including discharge voltage and discharge frequency, on the plasma temperatures were investigated. The electron number density determined in the discharge system and dc-SCGD were within the range (3.8–18.9) ×1014 cm-3 and 2.6×1014-17.2×1014 cm-3, respectively.

scholarly journals Electron number density measurements in nanosecond repetitively pulsed discharges in water vapor at atmospheric pressure

2020 ◽  
Vol 29 (2) ◽  
pp. 025017 ◽  
Author(s):  
Florent P Sainct ◽  
Keiichiro Urabe ◽  
Erwan Pannier ◽  
Deanna A Lacoste ◽  
Christophe O Laux
Keyword(s):  
Water Vapor ◽  
Atmospheric Pressure ◽  
Electron Number Density ◽  
Number Density ◽  
Electron Number ◽  
Density Measurements ◽  
Pulsed Discharges

scholarly journals Development of Simple Designs of Multitip Probe Diagnostic Systems for RF Plasma Characterization

2014 ◽  
Vol 2014 ◽  
pp. 1-8 ◽  
Author(s):  
M. Y. Naz ◽  
S. Shukrullah ◽  
A. Ghaffar ◽  
N. U. Rehman
Keyword(s):  
Radio Frequency ◽  
Electron Temperature ◽  
Inductively Coupled Plasma ◽  
Electron Number Density ◽  
Gas Pressure ◽  
Rf Plasma ◽  
Number Density ◽  
Diagnostic Systems ◽  
Electron Number ◽  
Double Probe

Multitip probes are very useful diagnostics for analyzing and controlling the physical phenomena occurring in low temperature discharge plasmas. However, DC biased probes often fail to perform well in processing plasmas. The objective of the work was to deduce simple designs of DC biased multitip probes for parametric study of radio frequency plasmas. For this purpose, symmetric double probe, asymmetric double probe, and symmetric triple probe diagnostic systems and their driving circuits were designed and tested in an inductively coupled plasma (ICP) generated by a 13.56 MHz radio frequency (RF) source. UsingI-Vcharacteristics of these probes, electron temperature, electron number density, and ion saturation current was measured as a function of input power and filling gas pressure. An increasing trend was noticed in electron temperature and electron number density for increasing input RF power whilst a decreasing trend was evident in these parameters when measured against filling gas pressure. In addition, the electron energy probability function (EEPF) was also studied by using an asymmetric double probe. These studies confirmed the non-Maxwellian nature of the EEPF and the presence of two groups of the energetic electrons at low filling gas pressures.

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