Abstract
In this work we have studied the energy and spectral characteristics of miniaturized dielectric barrier discharge KrCl-, XeCl-, XeBr-, and Xe2-excilamps of various designs as well as short pulse point-like light sources based on runaway electron preionized diffuse discharge. The maximum ultraviolet power density was 20 mW/cm2, which is comparable with the densities of ordinary dielectric barrier discharge excilamps, whereas the maximum efficiencies of the excilamps were not greater than 2.5%. The causes for the low radiation efficiency of the compact dielectric barrier discharge driven excilamps were analyzed. It is found that at an electron concentration of ne > 1014 cm-3, the efficiency decreases due to enhanced quenching of excited atoms or molecules in dissociation by electron impact. The spectral characteristics of a runaway electron preionized diffuse discharge formed between two pointed electrodes in atmospheric pressure air in an inhomogeneous electric field at a gap shorter than 8 mm were investigated. It is shown that the radiation spectrum of the discharge consists of bands of the second positive nitrogen system, and as the discharge transforms to a spark, lines of the electrode material appear in the spectrum. At a gap of 0.5 mm, weak X-rays from the discharge gap were detected.
| Original language | English |
|---|---|
| Pages (from-to) | 475-487 |
| Number of pages | 13 |
| Journal | Optica Applicata |
| Volume | 44 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - 2014 |
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Keywords
- Excilamps
- Light sources
- Plasma spectroscopy
- Runaway electron preionized diffuse discharge
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics
- Electronic, Optical and Magnetic Materials
Cite this
Miniaturized ultraviolet sources driven by dielectric barrier discharge and runaway electron preionized diffuse discharge. / Erofeev, Mikhail; Baksht, Eugenii; Tarasenko, Victor.
In: Optica Applicata, Vol. 44, No. 3, 2014, p. 475-487.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Miniaturized ultraviolet sources driven by dielectric barrier discharge and runaway electron preionized diffuse discharge
AU - Erofeev, Mikhail
AU - Baksht, Eugenii
AU - Tarasenko, Victor
PY - 2014
Y1 - 2014
N2 - In this work we have studied the energy and spectral characteristics of miniaturized dielectric barrier discharge KrCl-, XeCl-, XeBr-, and Xe2-excilamps of various designs as well as short pulse point-like light sources based on runaway electron preionized diffuse discharge. The maximum ultraviolet power density was 20 mW/cm2, which is comparable with the densities of ordinary dielectric barrier discharge excilamps, whereas the maximum efficiencies of the excilamps were not greater than 2.5%. The causes for the low radiation efficiency of the compact dielectric barrier discharge driven excilamps were analyzed. It is found that at an electron concentration of ne > 1014 cm-3, the efficiency decreases due to enhanced quenching of excited atoms or molecules in dissociation by electron impact. The spectral characteristics of a runaway electron preionized diffuse discharge formed between two pointed electrodes in atmospheric pressure air in an inhomogeneous electric field at a gap shorter than 8 mm were investigated. It is shown that the radiation spectrum of the discharge consists of bands of the second positive nitrogen system, and as the discharge transforms to a spark, lines of the electrode material appear in the spectrum. At a gap of 0.5 mm, weak X-rays from the discharge gap were detected.
AB - In this work we have studied the energy and spectral characteristics of miniaturized dielectric barrier discharge KrCl-, XeCl-, XeBr-, and Xe2-excilamps of various designs as well as short pulse point-like light sources based on runaway electron preionized diffuse discharge. The maximum ultraviolet power density was 20 mW/cm2, which is comparable with the densities of ordinary dielectric barrier discharge excilamps, whereas the maximum efficiencies of the excilamps were not greater than 2.5%. The causes for the low radiation efficiency of the compact dielectric barrier discharge driven excilamps were analyzed. It is found that at an electron concentration of ne > 1014 cm-3, the efficiency decreases due to enhanced quenching of excited atoms or molecules in dissociation by electron impact. The spectral characteristics of a runaway electron preionized diffuse discharge formed between two pointed electrodes in atmospheric pressure air in an inhomogeneous electric field at a gap shorter than 8 mm were investigated. It is shown that the radiation spectrum of the discharge consists of bands of the second positive nitrogen system, and as the discharge transforms to a spark, lines of the electrode material appear in the spectrum. At a gap of 0.5 mm, weak X-rays from the discharge gap were detected.
KW - Excilamps
KW - Light sources
KW - Plasma spectroscopy
KW - Runaway electron preionized diffuse discharge
UR - http://www.scopus.com/inward/record.url?scp=84913529737&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84913529737&partnerID=8YFLogxK
U2 - 10.5277/oa140311
DO - 10.5277/oa140311
M3 - Article
AN - SCOPUS:84913529737
VL - 44
SP - 475
EP - 487
JO - Optica Applicata
JF - Optica Applicata
SN - 0078-5466
IS - 3
ER -