UV and VUV excilamps excited by glow, barrier and capacitive discharges

Тарасенко, В. Ф.; Chernov, E. B.; Ерофеев, М. В.; Ломаев, М. И.; Панченко, А. Н.; Skakun, V. S.; Соснин, Э. А.; Shitz, Dmitrii V.

doi:10.1007/s003390051410

Cited by 23 publications

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“…Chemical reactions between halogen and metallic electrodes lead to quick changes in the composition of the working gas. Discharges with external electrodes (electrodeless) have higher lifetimes of the gas mixture by orders of magnitude [12,13]. For this reason, so called capacitive discharge lamps [8,12] have an advantage over glow discharge lamps.…”

Section: Introductionmentioning

confidence: 99%

“…Discharges with external electrodes (electrodeless) have higher lifetimes of the gas mixture by orders of magnitude [12,13]. For this reason, so called capacitive discharge lamps [8,12] have an advantage over glow discharge lamps. Capacitive discharge lamps are characterized by ring electrodes which are fixed on the outer wall of the quartz tube, outside of the gas volume.…”

Section: Introductionmentioning

confidence: 99%

“…Another type of electrodeless lamp is based on the dielectric barrier discharge (DBD) [8,[12][13][14][15][16][17][18][19]. For irradiation of large surfaces areas fine wire mesh electrodes are often implemented.…”

Section: Introductionmentioning

confidence: 99%

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A Miniaturized XeCl Dielectric Barrier Discharge as a Source of Short Lived, Fast Decaying UV Radiation

Bussiahn¹,

Pipa²,

Kindel³

2010

Contrib. Plasma Phys.

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A dielectric barrier discharge (DBD) of coaxial geometry has been examined as source of intensive, short-lived UV radiation. A binary gas mixture consisting of 98% Xe + 2% Cl2 and a ternary composition of 96% Ne + 6% Xe + 0.2% HCl were investigated in the pressure range between 10 and 750 mbar. The discharge was excited by unipolar high voltage square pulses with amplitudes of 3 to 7 kV at a repetition rate of 100 Hz. UV radiation intensity is increased by combining 5 square pulses with a period of 1 μs each in one train (burst). Radiation decay on three orders of magnitude within 10 μs was obtained for both gas mixtures in burst mode. Maximum energy of the light pulse was the same for both gas mixtures and estimated as 40 nJ. It is shown that the optimum gas pressure for highest radiation intensity depends not only on gas composition but also on applied voltage and number of pulses in the train. A variation of the spectral band shape of XeCl emission during the pulse is detected.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A Miniaturized XeCl Dielectric Barrier Discharge as a Source of Short Lived, Fast Decaying UV Radiation

Bussiahn¹,

Pipa²,

Kindel³

2010

Contrib. Plasma Phys.

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“…The UV‐radiation sources used for photochemical investigations were: (1) a DRT‐240 high‐pressure mercury lamp (Hg) and three barrier discharge excilamps [purchased from the Institute of High Current Electronics of the Siberian Branch, Russian Academy of Sciences (9)]. These were KrCl, XeBr and XeCl excilamps emitting maximum UV‐radiation at 222, 283 and 308 nm, respectively.…”

Section: Methodsmentioning

confidence: 99%

The role of UV‐irradiation pretreatment on the degradation of 2,4‐dichlorophenoxyacetic acid in water

et al. 2011

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The degradation of 2,4-dichlorophenoxyacetic acid (2,4-D) in water by the combination process of UV-irradiation, humic acids and activated sludge treatment has been studied. The photoreaction rate of all irradiated samples was lowest for the sample irradiated at 308 nm (the XeCl excilamp) in the absence and in the presence of humic acids, and highest for the sample irradiated at 222 nm (the KrCl excilamp). Photolysis of 2,4-D has been shown to enhance the subsequent microbial degradation.

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“…=5-10 run, Wpeak= 18 MW/cm2, p.r.r. f= 200 kHz, and a pulse duration of 1 s, developed at the High-Current Electronics Institute of the Siberian Branch of the Russian Academy of Sciences were used for photochemical investigations as UV-radiation sources [4]. The examined compounds were put in a rectangular quartz cell.…”

Section: Methodsmentioning

confidence: 99%

<title>Study of cresol phototransformations in neutral and acidic medium</title>

Соколова

Соснин

et al. 2004

SPIE Proceedings

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It is well known that pH value and excitation energy have a directly impact on photolysis rate of phenols under Hg-lamp irradiation and oxidation process. The purpose of the current study is the research of o-cresol and para-cresol photolysis in acidic medium under various spontaneous radiation sources irradiation. Photochemical degradation was carried out through a high pressure mercury lamp OKH-1 1M, and also with a new capacitive discharge excilamps on working molecules KrC1* (2v222 nm) and XeBr* (X'-283nm). Exposure time was varied from 1 to 40 minutes that corresponds radiation doses from 0.5 to 20 J/cm2. A comparison between phototransformations under different light excitation shows that cresol aqueous solutions acidation leads to increase of phototransformations efficiency. It has been found that both in neutral, and in acidic medium the photodecomposition of cresols is carried out more effectively under KrC1-excilamp irradiation.

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UV and VUV excilamps excited by glow, barrier and capacitive discharges

Cited by 23 publications

References 0 publications

A Miniaturized XeCl Dielectric Barrier Discharge as a Source of Short Lived, Fast Decaying UV Radiation

A Miniaturized XeCl Dielectric Barrier Discharge as a Source of Short Lived, Fast Decaying UV Radiation

The role of UV‐irradiation pretreatment on the degradation of 2,4‐dichlorophenoxyacetic acid in water

<title>Study of cresol phototransformations in neutral and acidic medium</title>

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