Local excitation of the wave of stratification in the positive column of an electric discharge

1958 ◽  
Vol 8 (4) ◽  
pp. 498-499 ◽  
Author(s):  
Luděk Pekárek
Keyword(s):  
Electric Discharge ◽  
Positive Column ◽  
Local Excitation

scholarly journals Electric discharge during electrosurgery

2015 ◽  
Vol 5 (1) ◽  
Author(s):  
Alexey Shashurin ◽  
David Scott ◽  
Taisen Zhuang ◽  
Jerome Canady ◽  
Isak I. Beilis ◽  
...  
Keyword(s):  
Electric Discharge ◽  
Rayleigh Scattering ◽  
Positive Column ◽  
Plasma Electron ◽  
Atmospheric Plasma ◽  
Plasma Parameters ◽  
Breakdown Threshold ◽  
Half Wave ◽  
Electrical Conductivities ◽  
The Moment

Abstract Electric discharge utilized for electrosurgery is studied by means of a recently developed method for the diagnostics of small-size atmospheric plasma objects based on Rayleigh scattering of microwaves on the plasma volume. Evolution of the plasma parameters in the near-electrode sheaths and in the positive column is measured and analyzed. It is found that the electrosurgical system produces a glow discharge of alternating current with strongly contracted positive column with current densities reaching 103 A/cm2. The plasma electron density and electrical conductivities in the channel were found be 1016 cm−3 and (1-2) Ohm−1cm−1, respectively. The discharge interrupts every instance when the discharge-driving AC voltage crosses zero and re-ignites again every next half-wave at the moment when the instant voltage exceeds the breakdown threshold.

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