Blue and green jets in laboratory discharges initiated by runaway electrons

D. V. Beloplotov, M. I. Lomaev, D. A. Sorokin, V. F. Tarasenko

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Spectral and amplitude-temporal characteristics of plasma radiation of nanosecond pulse-periodic discharge in air, nitrogen and argon in pressure range of 30-760 Torr were investigated. Discharge gap geometry was a "point-to-plane". Voltage pulses of negative polarity (amplitude, FWHM and risetime was 13 kV, 10 ns and 4 ns, respectively) were applied to a pointed cathode made of different metals (stainless steel, aluminum and copper). Jets of different colour were observed near a cathode tip. They are formed due to explosive emission. Colour of jets depends on the cathode material. Intense lines of the atoms and ions of iron in the wavelength range of 200-600 nm, aluminum with λ = 394.4, 396.15 nm, including multiply charged ion Al VI with λ = 360.39 and 361.65 nm, copper with λ = 324.8, 327.3, 510.6, 515.3, 521.8, 522 nm were registered. The resonance energy transfer from metastable A3Π+u level of nitrogen molecule to 3d104p level of Cu I was found. As a result a luminescence duration of Cu I was about 1.5 μs at duration of discharge current of 1.5 ps. During constriction of the diffuse discharge the sputtering of material occurs in the direction perpendicular to the longitudinal axis of the discharge gap.

Original languageEnglish
Article number012012
JournalJournal of Physics: Conference Series
Volume652
Issue number1
DOIs
Publication statusPublished - 5 Nov 2015
Externally publishedYes

Fingerprint

cathodes
aluminum
color
plasma radiation
nitrogen
copper
pulses
stainless steels
constrictions
polarity
ions
sputtering
energy transfer
argon
luminescence
iron
air
electric potential
geometry
wavelengths

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Blue and green jets in laboratory discharges initiated by runaway electrons. / Beloplotov, D. V.; Lomaev, M. I.; Sorokin, D. A.; Tarasenko, V. F.

In: Journal of Physics: Conference Series, Vol. 652, No. 1, 012012, 05.11.2015.

Research output: Contribution to journalArticle

@article{9f80541dd31c49b6a0286d0f59fc3637,
title = "Blue and green jets in laboratory discharges initiated by runaway electrons",
abstract = "Spectral and amplitude-temporal characteristics of plasma radiation of nanosecond pulse-periodic discharge in air, nitrogen and argon in pressure range of 30-760 Torr were investigated. Discharge gap geometry was a {"}point-to-plane{"}. Voltage pulses of negative polarity (amplitude, FWHM and risetime was 13 kV, 10 ns and 4 ns, respectively) were applied to a pointed cathode made of different metals (stainless steel, aluminum and copper). Jets of different colour were observed near a cathode tip. They are formed due to explosive emission. Colour of jets depends on the cathode material. Intense lines of the atoms and ions of iron in the wavelength range of 200-600 nm, aluminum with λ = 394.4, 396.15 nm, including multiply charged ion Al VI with λ = 360.39 and 361.65 nm, copper with λ = 324.8, 327.3, 510.6, 515.3, 521.8, 522 nm were registered. The resonance energy transfer from metastable A3Π+u level of nitrogen molecule to 3d104p level of Cu I was found. As a result a luminescence duration of Cu I was about 1.5 μs at duration of discharge current of 1.5 ps. During constriction of the diffuse discharge the sputtering of material occurs in the direction perpendicular to the longitudinal axis of the discharge gap.",
author = "Beloplotov, {D. V.} and Lomaev, {M. I.} and Sorokin, {D. A.} and Tarasenko, {V. F.}",
year = "2015",
month = "11",
day = "5",
doi = "10.1088/1742-6596/652/1/012012",
language = "English",
volume = "652",
journal = "Journal of Physics: Conference Series",
issn = "1742-6588",
publisher = "IOP Publishing Ltd.",
number = "1",

}

TY - JOUR

T1 - Blue and green jets in laboratory discharges initiated by runaway electrons

AU - Beloplotov, D. V.

AU - Lomaev, M. I.

AU - Sorokin, D. A.

AU - Tarasenko, V. F.

PY - 2015/11/5

Y1 - 2015/11/5

N2 - Spectral and amplitude-temporal characteristics of plasma radiation of nanosecond pulse-periodic discharge in air, nitrogen and argon in pressure range of 30-760 Torr were investigated. Discharge gap geometry was a "point-to-plane". Voltage pulses of negative polarity (amplitude, FWHM and risetime was 13 kV, 10 ns and 4 ns, respectively) were applied to a pointed cathode made of different metals (stainless steel, aluminum and copper). Jets of different colour were observed near a cathode tip. They are formed due to explosive emission. Colour of jets depends on the cathode material. Intense lines of the atoms and ions of iron in the wavelength range of 200-600 nm, aluminum with λ = 394.4, 396.15 nm, including multiply charged ion Al VI with λ = 360.39 and 361.65 nm, copper with λ = 324.8, 327.3, 510.6, 515.3, 521.8, 522 nm were registered. The resonance energy transfer from metastable A3Π+u level of nitrogen molecule to 3d104p level of Cu I was found. As a result a luminescence duration of Cu I was about 1.5 μs at duration of discharge current of 1.5 ps. During constriction of the diffuse discharge the sputtering of material occurs in the direction perpendicular to the longitudinal axis of the discharge gap.

AB - Spectral and amplitude-temporal characteristics of plasma radiation of nanosecond pulse-periodic discharge in air, nitrogen and argon in pressure range of 30-760 Torr were investigated. Discharge gap geometry was a "point-to-plane". Voltage pulses of negative polarity (amplitude, FWHM and risetime was 13 kV, 10 ns and 4 ns, respectively) were applied to a pointed cathode made of different metals (stainless steel, aluminum and copper). Jets of different colour were observed near a cathode tip. They are formed due to explosive emission. Colour of jets depends on the cathode material. Intense lines of the atoms and ions of iron in the wavelength range of 200-600 nm, aluminum with λ = 394.4, 396.15 nm, including multiply charged ion Al VI with λ = 360.39 and 361.65 nm, copper with λ = 324.8, 327.3, 510.6, 515.3, 521.8, 522 nm were registered. The resonance energy transfer from metastable A3Π+u level of nitrogen molecule to 3d104p level of Cu I was found. As a result a luminescence duration of Cu I was about 1.5 μs at duration of discharge current of 1.5 ps. During constriction of the diffuse discharge the sputtering of material occurs in the direction perpendicular to the longitudinal axis of the discharge gap.

UR - http://www.scopus.com/inward/record.url?scp=84957837580&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84957837580&partnerID=8YFLogxK

U2 - 10.1088/1742-6596/652/1/012012

DO - 10.1088/1742-6596/652/1/012012

M3 - Article

VL - 652

JO - Journal of Physics: Conference Series

JF - Journal of Physics: Conference Series

SN - 1742-6588

IS - 1

M1 - 012012

ER -