Bent paths of a positive streamer and a cathode-directed spark leader in diffuse discharges preionized by runaway electrons

Cheng Zhang, Viktor F. Tarasenko, Tao Shao, Dmitry V. Beloplotov, Mikhail I. Lomaev, Ruixue Wang, Dmitry A. Sorokin, Ping Yan

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

Diffuse discharges preionized by runaway electrons can produce large-area homogeneous discharges at elevated pressures, which is an intriguing phenomenon in the physics of pulsed discharges. In this paper, runaway-electron-preionized diffuse discharge (REP DD) was obtained in a wide pressure range (0.05-0.25 MPa), and under certain conditions a positive streamer and a cathode-directed spark leader could be observed to propagate at some angles to the applied (background) electric field lines. For a 16-mm gap at an air pressure of 0.08-0.1 MPa, the percentage of pulses in which such propagation is observed is about 5%-50% of their total number, and in the other pulses such bent paths could not be observed because there is even no streamer or cathode-directed spark leader in diffuse discharges. In our opinion, such propagation of the positive streamer and the cathode-directed spark leader at some angle to the background electric field lines owes to different increase rates of the electron density in different regions of the discharge volume under REP DD conditions. Therefore, during the formation of a REP DD, the increase of the electron density is inhomogeneous and nonsimultaneous, resulting in an electron density gradient at the ionization wave front.

Original languageEnglish
Article number033511
JournalPhysics of Plasmas
Volume22
Issue number3
DOIs
Publication statusPublished - 1 Mar 2015
Externally publishedYes

Fingerprint

sparks
cathodes
propagation
electric fields
wave fronts
pulses
ionization
gradients
physics
air

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Bent paths of a positive streamer and a cathode-directed spark leader in diffuse discharges preionized by runaway electrons. / Zhang, Cheng; Tarasenko, Viktor F.; Shao, Tao; Beloplotov, Dmitry V.; Lomaev, Mikhail I.; Wang, Ruixue; Sorokin, Dmitry A.; Yan, Ping.

In: Physics of Plasmas, Vol. 22, No. 3, 033511, 01.03.2015.

Research output: Contribution to journalArticle

Zhang, Cheng ; Tarasenko, Viktor F. ; Shao, Tao ; Beloplotov, Dmitry V. ; Lomaev, Mikhail I. ; Wang, Ruixue ; Sorokin, Dmitry A. ; Yan, Ping. / Bent paths of a positive streamer and a cathode-directed spark leader in diffuse discharges preionized by runaway electrons. In: Physics of Plasmas. 2015 ; Vol. 22, No. 3.
@article{1b233b5355e240a5ad9151bf2486c941,
title = "Bent paths of a positive streamer and a cathode-directed spark leader in diffuse discharges preionized by runaway electrons",
abstract = "Diffuse discharges preionized by runaway electrons can produce large-area homogeneous discharges at elevated pressures, which is an intriguing phenomenon in the physics of pulsed discharges. In this paper, runaway-electron-preionized diffuse discharge (REP DD) was obtained in a wide pressure range (0.05-0.25 MPa), and under certain conditions a positive streamer and a cathode-directed spark leader could be observed to propagate at some angles to the applied (background) electric field lines. For a 16-mm gap at an air pressure of 0.08-0.1 MPa, the percentage of pulses in which such propagation is observed is about 5{\%}-50{\%} of their total number, and in the other pulses such bent paths could not be observed because there is even no streamer or cathode-directed spark leader in diffuse discharges. In our opinion, such propagation of the positive streamer and the cathode-directed spark leader at some angle to the background electric field lines owes to different increase rates of the electron density in different regions of the discharge volume under REP DD conditions. Therefore, during the formation of a REP DD, the increase of the electron density is inhomogeneous and nonsimultaneous, resulting in an electron density gradient at the ionization wave front.",
author = "Cheng Zhang and Tarasenko, {Viktor F.} and Tao Shao and Beloplotov, {Dmitry V.} and Lomaev, {Mikhail I.} and Ruixue Wang and Sorokin, {Dmitry A.} and Ping Yan",
year = "2015",
month = "3",
day = "1",
doi = "10.1063/1.4914930",
language = "English",
volume = "22",
journal = "Physics of Plasmas",
issn = "1070-664X",
publisher = "American Institute of Physics Publising LLC",
number = "3",

}

TY - JOUR

T1 - Bent paths of a positive streamer and a cathode-directed spark leader in diffuse discharges preionized by runaway electrons

AU - Zhang, Cheng

AU - Tarasenko, Viktor F.

AU - Shao, Tao

AU - Beloplotov, Dmitry V.

AU - Lomaev, Mikhail I.

AU - Wang, Ruixue

AU - Sorokin, Dmitry A.

AU - Yan, Ping

PY - 2015/3/1

Y1 - 2015/3/1

N2 - Diffuse discharges preionized by runaway electrons can produce large-area homogeneous discharges at elevated pressures, which is an intriguing phenomenon in the physics of pulsed discharges. In this paper, runaway-electron-preionized diffuse discharge (REP DD) was obtained in a wide pressure range (0.05-0.25 MPa), and under certain conditions a positive streamer and a cathode-directed spark leader could be observed to propagate at some angles to the applied (background) electric field lines. For a 16-mm gap at an air pressure of 0.08-0.1 MPa, the percentage of pulses in which such propagation is observed is about 5%-50% of their total number, and in the other pulses such bent paths could not be observed because there is even no streamer or cathode-directed spark leader in diffuse discharges. In our opinion, such propagation of the positive streamer and the cathode-directed spark leader at some angle to the background electric field lines owes to different increase rates of the electron density in different regions of the discharge volume under REP DD conditions. Therefore, during the formation of a REP DD, the increase of the electron density is inhomogeneous and nonsimultaneous, resulting in an electron density gradient at the ionization wave front.

AB - Diffuse discharges preionized by runaway electrons can produce large-area homogeneous discharges at elevated pressures, which is an intriguing phenomenon in the physics of pulsed discharges. In this paper, runaway-electron-preionized diffuse discharge (REP DD) was obtained in a wide pressure range (0.05-0.25 MPa), and under certain conditions a positive streamer and a cathode-directed spark leader could be observed to propagate at some angles to the applied (background) electric field lines. For a 16-mm gap at an air pressure of 0.08-0.1 MPa, the percentage of pulses in which such propagation is observed is about 5%-50% of their total number, and in the other pulses such bent paths could not be observed because there is even no streamer or cathode-directed spark leader in diffuse discharges. In our opinion, such propagation of the positive streamer and the cathode-directed spark leader at some angle to the background electric field lines owes to different increase rates of the electron density in different regions of the discharge volume under REP DD conditions. Therefore, during the formation of a REP DD, the increase of the electron density is inhomogeneous and nonsimultaneous, resulting in an electron density gradient at the ionization wave front.

UR - http://www.scopus.com/inward/record.url?scp=84925013966&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84925013966&partnerID=8YFLogxK

U2 - 10.1063/1.4914930

DO - 10.1063/1.4914930

M3 - Article

VL - 22

JO - Physics of Plasmas

JF - Physics of Plasmas

SN - 1070-664X

IS - 3

M1 - 033511

ER -