scholarly journals An Experimental Test of the Streamer Breakdown Criterion

1970 ◽  
Vol 23 (6) ◽  
pp. 953 ◽  
Author(s):  
MC Cavenor
Keyword(s):  
Glow Discharge ◽  
Experimental Test ◽  
Electrical Breakdown ◽  
Breakdown Potential ◽  
Electron Avalanches ◽  
Spark Channel ◽  
Diffuse Glow ◽  
Streamer Breakdown

The filamentary spark channel, resulting from the electrical breakdown of a gas, generally forms in one of two ways. At voltages close to the minimum breakdown potential the spark channel has been shown to develop from the constriction of the diffuse glow discharge formed from the superposition of many generations of electron avalanches (Cavenor and Meyer 1969).

Parametric Study of the Current–Voltage Characteristics of a 100-mbar DC Discharge in Argon: From the Diffuse Glow Discharge to the Arc Regime

2013 ◽  
Vol 41 (8) ◽  
pp. 2400-2407
Author(s):  
Romaric Landfried ◽  
Richard Andlauer ◽  
Philippe Dessante ◽  
Michael J. Kirkpatrick ◽  
Thierry Leblanc ◽  
...  
Keyword(s):  
Glow Discharge ◽  
Parametric Study ◽  
Dc Discharge ◽  
Current Voltage ◽  
Current Voltage Characteristics ◽  
Diffuse Glow

scholarly journals The Development of Spark Discharges in Hydrogen

1969 ◽  
Vol 22 (2) ◽  
pp. 155 ◽  
Author(s):  
MC Cavenor ◽  
J Meyer
Keyword(s):  
Glow Discharge ◽  
Low Voltage ◽  
Sudden Change ◽  
Coaxial Cable ◽  
Gas Temperature ◽  
Additional Information ◽  
Spark Discharges ◽  
Current Flows ◽  
Two Stages ◽  
Diffuse Glow

Streak photography has been used to supplement the earlier shutter photo. graphic investigation of Doran and Meyer (1967) using the same coaxial cable discharge circuit. Additional information has also been obtained from measurement of the potential distribution between the electrodes at two stages in the spark development. Redistribution of space charge is shown to give rise firstly to a transient diffuse glow discharge that has a close similarity with a normal d.c. glow discharge. It has also been shown that, even while the diffuse glow discharge expands, a partial constriction occurs in which most of the current flows along a narrow axial column. The resulting maximum in electron density eventually causes a rapid increase in dissociation of molecular hydrogen on the axis of the discharge brought about by a rise in the gas temperature. Owing to its greater electrical conductivity this axial column soon carries the entire current and the discharge becomes filamentary though still being maintained by a high cathode fall field, which exists until a sudden change in the cathode mechanism gives rise to the low voltage arc channel. Both the filamentary glow and arc columns are observed to expand according to an r cc ti law.

Characteristics of ozone generation by a diffuse glow discharge at atmospheric pressure using a double discharge method

1999 ◽  
Vol 127 (2) ◽  
pp. 8-14 ◽  
Author(s):  
Kazunori Hakiai ◽  
Satoshi Ihara ◽  
Saburoh Satoh ◽  
Chobei Yamabe
Keyword(s):  
Glow Discharge ◽  
Atmospheric Pressure ◽  
Ozone Generation ◽  
Diffuse Glow ◽  
Discharge Method ◽  
Double Discharge

Correlation of the formative time lags with the light emitted from spark discharges

1964 ◽  
Vol 278 (1373) ◽  
pp. 188-213 ◽  
Keyword(s):  
Time Lags ◽  
Dry Air ◽  
Spark Discharges ◽  
Logarithmic Plot ◽  
Formative Time ◽  
Atomic Lines ◽  
Band Spectra ◽  
Spark Channel ◽  
Diffuse Glow ◽  
Different Gases

Measurements of the formative time lags in homogeneous fields for different gases up to pd values of 3000 mmHg cm have been made. For overvolted gaps in dry air and oxygen a discontinuity is found in the logarithmic plot of overvoltage against formative time. This is considered to be evidence of a transition from a Townsend- to a streamer-type of discharge. No definite sign of this change has been found in hydrogen, nitrogen and pure argon. Additional evidence that the discontinuity is the transition from one initiating mechanism to another is obtained from still photographs of the sparks. These indicate that at low values of overvoltage the discharge consists of a diffuse glow and spark channel while the streamer initiated spark has a narrow constricted glow. The position of the bright constriction or knob in the gap varies with overvoltage and its position agrees with the value predicted by the Meek criterion αx crit. = 20. The value of overvoltage at which the transition occurs decreases with pd and is about 5 % at pd = 1000 mm Hg cm and 1-5 % at pd = 3000 mmHg cm. By extrapolation it seems unlikely that the streamer mechanism will occur at minimum break-down for pd values less than 7000 mmHg cm. Oscillographic studies have shown that the disappearance of the glow to arc step is not always a satisfactory Townsend to streamer criterion. Spectra of the sparks in air show a continuum associated with the constriction in the streamer together with bright atomic lines and weakening of the band spectra.

Zur Trägerzahlstatistik in Folgen von Elektronenlawinen

1964 ◽  
Vol 19 (4) ◽  
pp. 481-483 ◽  
Author(s):  
Werner Legler
Keyword(s):  
Distribution Function ◽  
Electron Attachment ◽  
Breakdown Potential ◽  
Gas Discharges ◽  
Electron Avalanches

The distribution function for the carrier numbers of series of electron avalanches is calculated. These series develop in gas discharges if the gap voltage approaches the breakdown potential. The calculation is valid for the case that the distribution function of the avalanches is given by v(n) = (l/n) exp( - n/n). The influence of electron attachment on the derived formula is investigated.

scholarly journals Characteristics of NO Treatment by a Diffuse Glow Discharge at Atmospheric Pressure

1999 ◽  
Vol 119 (1) ◽  
pp. 25-30 ◽  
Author(s):  
Kazunori Hakiai ◽  
Naoki Taniguchi ◽  
Satoshi Ihara ◽  
Saburoh Satoh ◽  
Chobei Yamabe
Keyword(s):  
Glow Discharge ◽  
Atmospheric Pressure ◽  
Diffuse Glow

The Applicability of Fluid Model to Electrical Breakdown and Glow Discharge Modeling in Argon

2015 ◽  
Vol 32 (2) ◽  
pp. 025101 ◽  
Author(s):  
M. N. Stankov ◽  
M. D. Petković ◽  
V. Lj. Marković ◽  
S. N. Stamenković ◽  
A. P. Jovanović
Keyword(s):  
Glow Discharge ◽  
Electrical Breakdown ◽  
Fluid Model ◽  
Discharge Modeling

Probability of electrical breakdown: Evidence for a transition between the Townsend and streamer breakdown mechanisms

1985 ◽  
Vol 31 (4) ◽  
pp. 2610-2620 ◽  
Author(s):  
R. V. Hodges ◽  
R. N. Varney ◽  
J. F. Riley
Keyword(s):  
Electrical Breakdown ◽  
Streamer Breakdown
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