Plasma and Gas-Dynamic Near-Electrode Processes in the Initial Phase of a Microstructured Spark Discharge in Air

2020 ◽  
Vol 46 (8) ◽  
pp. 737-740 ◽  
Author(s):  
K. I. Almazova ◽  
A. N. Belonogov ◽  
V. V. Borovkov ◽  
V. S. Kurbanismailov ◽  
G. B. Ragimkhanov ◽  
...  
Keyword(s):  
Initial Phase ◽  
Spark Discharge ◽  
Electrode Processes ◽  
Gas Dynamic

scholarly journals Плазменные и газодинамические приэлектродные процессы в начальной фазе микроструктурированного искрового разряда в воздухе

2020 ◽  
Vol 46 (15) ◽  
pp. 10
Author(s):  
К.И. Алмазова ◽  
А.Н. Белоногов ◽  
В.В. Боровков ◽  
В.С. Курбанисмаилов ◽  
Г.Б. Рагимханов ◽  
...  
Keyword(s):  
Experimental Data ◽  
Physical Model ◽  
Electron Concentration ◽  
Atmospheric Pressure ◽  
Initial Phase ◽  
Dynamic Parameters ◽  
Dynamic Effects ◽  
Associated Gas ◽  
Electrode Processes ◽  
Gas Dynamic

The results of studies of the dynamics of near-electrode processes in the initial phase of the spark are presented. discharge in air at atmospheric pressure in the tip – plane geometry. Near the surface of a flat After the breakdown of the cathode, regions with a size of about 50 μm and more were recorded with an increased electron concentration of (3–8)•10^19 cm^(– 3). Based on experimental data on erosion the effect of a discharge on the surface of a flat electrode and the associated gas-dynamic effects a physical model of near-electrode processes is proposed, based on which estimates are made gas dynamic parameters.

Мicrochannel Structure Parameters in the Initial Phase of a Spark Discharge in a Tip–Plane Gap in Atmospheric-Pressure Air

2021 ◽  
Vol 47 (1) ◽  
pp. 71-74
Author(s):  
K. I. Almazova ◽  
A. A. Amirova ◽  
A. N. Belonogov ◽  
V. V. Borovkov ◽  
G. B. Ragimkhanov ◽  
...  
Keyword(s):  
Atmospheric Pressure ◽  
Initial Phase ◽  
Spark Discharge ◽  
Structure Parameters

scholarly journals COMPARISON OF SPARK CHANNEL EXPANSION IN HYDROGEN, OXYGEN AND NITROGEN

2020 ◽  
pp. 165-168
Author(s):  
K.V. Korytchenko ◽  
Yu.V. Kashanskyi ◽  
O.V. Cherkashyn ◽  
D.Yu. Belyuchenko ◽  
A.V. Maksimov ◽  
...  
Keyword(s):  
Thermodynamic Properties ◽  
Discharge Current ◽  
Spark Discharge ◽  
Detonation Initiation ◽  
Species Concentration ◽  
Gas Dynamic ◽  
Channel Expansion ◽  
Spark Channel

The results of the spark channel expansion simulation in various gases such as hydrogen, oxygen and nitrogen have been presented. Difference in thermodynamic properties of the various gases has been taken into account. Influence of a type of gas on the discharge current, the spark resistance, the energy deposited in the spark and the spark gas-dynamic expansion has been found out. Influence of initial species concentration in mixture of nitrogen, hydrogen and oxygen on detonation initiation by spark discharge has been discussed.

scholarly journals Параметры микроканальной структуры в начальной фазе искрового разряда в воздухе атмосферного давления в промежутке острие-плоскость

2021 ◽  
Vol 47 (2) ◽  
pp. 24
Author(s):  
К.И. Алмазова ◽  
А.А. Амирова ◽  
А.Н. Белоногов ◽  
В.В. Боровков ◽  
Г.Б. Рагимханов ◽  
...  
Keyword(s):  
Experimental Data ◽  
Electrical Conductivity ◽  
Electric Field ◽  
Electron Temperature ◽  
Electron Concentration ◽  
Initial Phase ◽  
Spark Discharge ◽  
Degree Of Ionization ◽  
Average Electron ◽  
High Degree

The results of investigations of the microstructure in the initial phase of a spark discharge in air in the 1.5 mm long gap between a tip and a plane are presented. Measurements show that, within 15 ns after breakdown, the channel is a set of a large number of microchannels, the current in the channel grows almost linearly up to 1 kA, and the electron concentration reaches the value of 2 • 10^19 cm^(−3). Kinetic processes in a separate microchannel were calculated based on the experimental data. It was found that the average electron temperature is in the range of 4-8 eV, the electric field is ~ 300 kV/cm, and the electrical conductivity is ∼10 Ω^(−1)•cm^(−1). The obtained results indicate that it is just the microstructure of the discharge determines the relatively high values of the average electron temperature in combination with a sufficiently high degree of ionization.

LOCALIZATION OF RADIO EMISSION SOURCE IN THE INITIAL PHASE OF THE SPARK DISCHARGE

2021 ◽  
Vol 48 (11) ◽  
pp. 349-352
Author(s):  
I. S. Baidin ◽  
A. A. Rodionov ◽  
A. V. Oginov ◽  
K. V. Shpakov
Keyword(s):  
Radio Emission ◽  
Initial Phase ◽  
Spark Discharge ◽  
Emission Source

scholarly journals Plasma and Gas-Dynamic Near-Electrode Processes in Pulsed Discharge in Atmospheric Pressure Helium

2021 ◽  
Vol 36 (4) ◽  
pp. 13-19
Author(s):  
V.S. Kurbanismailov ◽  
◽  
G.B. Ragimkhanov ◽  
Z.R. Khalikova ◽  
◽  
...  
Keyword(s):  
Atmospheric Pressure ◽  
Pulsed Discharge ◽  
Electrode Processes ◽  
Gas Dynamic

scholarly journals Сверхширокополосная антенна для регистрации радиоизлучения в начальной фазе высоковольтного лабораторного атмосферного разряда

2021 ◽  
Vol 91 (12) ◽  
pp. 1910
Author(s):  
И.С. Байдин ◽  
А.В. Огинов ◽  
Е.В. Паркевич
Keyword(s):  
Radio Emission ◽  
Emission Spectrum ◽  
Initial Phase ◽  
Sharp Increase ◽  
Laboratory Experiments ◽  
Spark Discharge ◽  
Ultra Wideband ◽  
Wideband Antenna ◽  
Flat Type ◽  
Vivaldi Antenna

A compact ultra - wideband antenna, designed for the employment in the experiments on studying radio emission generated in the initial phase of the spark discharge, is presented. A flat type of antennas based on an expanding slit (Vivaldi antenna) is considered. The simulation and calculation of the antenna parameters are carried out. The results of using the antenna in laboratory experiments are demonstrated. It is shown that the generation of the highest frequency part of the radio emission spectrum coincides with the pre-breakdown stage of the discharge, before a sharp increase in the current starts.

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