scholarly journals Studing of Some Characteristics and parameters of Argon Glow discharge plasma Using Hollow Anode Diameter

2018 ◽  
Vol 6 (1) ◽  
pp. 26
Author(s):  
Shamo Kh. Al-Hakary ◽  
Esraa A. Mohammed Saeed ◽  
Diyar A. Bleej ◽  
Suzan M. Haji ◽  
Sahme A. Hussain
Keyword(s):  
Glow Discharge ◽  
Breakdown Voltage ◽  
Discharge Plasma ◽  
Glow Discharge Plasma ◽  
Plasma Parameters ◽  
Negative Glow ◽  
Argon Gas ◽  
Hollow Anode ◽  
Matlab Program ◽  
Density Of Electrons

Hollow anode argon glow discharge plasma has been investigated experimentally at different argon gas pressure from constant discharge current. A sufficient high voltage has been applied among the electrodes to obtain breakdown. Firstly, we studied the influence of hollow anode diameter on the breakdown voltage and Paschens law. The inner diameters of hollow anodes used in our work were (10, 15, 20, 25, 30, 35, and 40) mm. Secondly under the same conditions we extended our study to measure some plasma parameters in the negative glow region using direct current argon glow discharge. The temperature and density of electrons in the negative glow were measured using double probes. From the (Ip-Vp) characteristics of double probes, we obtained plasma parameters by using computer MATLAB program. The results showed that the measured Pashence's curve closes to the well-known theoretical Pashence's law. The breakdown voltage and its minimum value decreased with increasing the hollow anode diameter. The Paschen’s curve became wide and shifted to lower pressure with increasing the diameter. The reduction area of hollow anode caused dens and luminous intensity of plasma to occur in the negative glow region. Increasing the diameter resulted in decreasing the temperature and density of electron.

scholarly journals Investigation of Pulse Glow Discharge Excitation Modes in N2 in a Hollow Cylindrical Combined Cathode

2017 ◽  
Vol 4 (1) ◽  
pp. 5-7
Author(s):  
S. Bordusau ◽  
S. Madveika ◽  
A. Bozhko ◽  
O. Tsikhan
Keyword(s):  
Glow Discharge ◽  
Breakdown Voltage ◽  
Electric Discharge ◽  
Pressure Range ◽  
Discharge Plasma ◽  
Glow Discharge Plasma ◽  
Discharge Excitation ◽  
Pulse Glow Discharge ◽  
Stable Formation

Electric discharge excitation modes and N<sub>2</sub> pressure range for a stable formation and maintaining of pulse glow discharge plasma in a hollow combined cathode have been investigated. It has been found that both of these parameters are influenced by the constructive peculiarities of the cathode. It has been established experimentally that the value of N<sub>2</sub> breakdown voltage for the studied construction of the cathode within the range of 50-250 Pa does not exceed -700 V.

scholarly journals Investigation of Hot Cathode and Hollow Anode of Argon Glow Discharge Plasma

2014 ◽  
Vol 6 (5) ◽  
Author(s):  
Shamoo K. Al-Hakary ◽  
Luqman Dosky ◽  
Shamil K. Talal
Keyword(s):  
Glow Discharge ◽  
Discharge Plasma ◽  
Glow Discharge Plasma ◽  
Hollow Anode

Glow discharge plasma with an extended hollow cathode

2021 ◽  
pp. 65-68
Author(s):  
E.I. Gyrylov ◽  
Keyword(s):  
Glow Discharge ◽  
Hollow Cathode ◽  
Plasma Column ◽  
Electric Double Layer ◽  
Discharge Plasma ◽  
Low Voltage ◽  
Glow Discharge Plasma ◽  
Plasma Parameters ◽  
Discharge System ◽  
Pressure Glow Discharge

A low-voltage low-pressure glow discharge with a hollow cathode is considered. The discharge is ignited in a reflective discharge system with two symmetrical peripheral discharge chambers, with a common extended hollow cathode at forevacuum. Plasma parameters were determined, admissible diameter of the plasma column in a hollow cathode. It is shown that there is no electric double layer in the region of the output aperture of the cathode cavity.

Distribution of electrokinetic characteristics in a negative glow discharge plasma

1975 ◽  
Vol 18 (9) ◽  
pp. 1281-1286
Author(s):  
G. S. Evtushenko ◽  
A. G. Gridnev ◽  
I. I. Murav'ev
Keyword(s):  
Glow Discharge ◽  
Discharge Plasma ◽  
Glow Discharge Plasma ◽  
Negative Glow

scholarly journals ON MECHANISMS OF INCREASING HCL DISSOCIATION DEGREE IN GLOW DISCHARGE PLASMA

2018 ◽  
Vol 61 (7) ◽  
pp. 62
Author(s):  
Alexander M. Efremov ◽  
Dmitry B. Murin ◽  
Sergey V. Belyaev
Keyword(s):  
Glow Discharge ◽  
Discharge Plasma ◽  
Glow Discharge Plasma ◽  
Gas Mixture ◽  
Dissociation Kinetics ◽  
Plasma Parameters ◽  
Charged Species ◽  
Electron Impact Dissociation ◽  
Dissociation Degree ◽  
Physical Plasma

The influence of initial compositions of the binary HCl+Ar and HCl+O2 gas mixtures on the hydrogen chloride dissociation kinetics in low temperature gas discharge plasma was investigated. The experiments were carried out under the conditions of direct current glow discharge at constant total gas pressure (100 Pa) and discharge current (25 mA). The data on electro-physical plasma parameters and plasma composition were obtained by modeling procedure based on the simultaneous solution of Boltzmann kinetic equation and the equations of chemical kinetics for neutral and charged species in a steady-state approximation. It was found that an increase in the second component fraction in both gas mixtures results in the sufficient increase in the HCl dissociation degree (aHCl = 23–43% for 0–80% Ar and 23–90% for 0–80% O2), which is associated with different mechanisms. Particularly, in the HCl+Ar gas mixture, an effect of increasing aHCl is provided by an increase in the electron impact dissociation frequency due to the change in electro-physical plasma parameters, such as electron mean energy and electron density. For the HCl+O2 gas mixture, such mechanism is almost negligible because of the weak disturbances in both electron energy distribution and formation/decay balance for charged species in the combination of two molecular electronegative gases. At the same time, the HCl dissociation kinetics in this gas system appears to be strongly dependent on the gas-phase interactions with ground state of oxygen atoms O(3P), metastable atoms O(1D) and OH radicals. It was found that the rates of corresponding processes begin to exceed the HCl electron impact dissociation rate at 20% O2 in HCl+O2.Forcitation:Efremov A.M., Murin D.B., Belyaev S.V. On mechanisms of increasing hcl dissociation degree in glow discharge plasma. Izv. Vyssh. Uchebn. Zaved. Khim. Khim. Tekhnol. 2018. V. 61. N 7. P. 61-66

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