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Accurate in-situ gas temperature measurements in dielectric barrier discharges at atmospheric pressure
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10.1063/1.4719208
/content/aip/journal/apl/100/20/10.1063/1.4719208
http://aip.metastore.ingenta.com/content/aip/journal/apl/100/20/10.1063/1.4719208
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Figures

Image of FIG. 1.
FIG. 1.

(a) Schematic diagram of a DBD apparatus for treating flat surfaces (see Ref. 4). (b) Schematic view of the second DBD system: (1) high-voltage ac power supply; (2) cylindrical chamber; (3) alumina-coated low-voltage electrode (2.54 cm Ø); (4) cylindrical (Kapton-covered) high voltage electrode (0.76 cm Ø); (5) gas inlet; (6) gas exit; (7) resistance for current measurements; (8) thermocouple [embedded in (3)]; (9) Bragg grating fibre-optic temperature sensor; (10) glass capillary; (11) BBS; (12) optical circulator, where In: Input, Tr: Transmitted, Br: Back reflection; and (13) OSA (see Ref. 21).

Image of FIG. 2.
FIG. 2.

Voltage signals and total light emission (photocurrent) from DBDs at atmospheric pressure; (a) air (f = 3.5 kHz); (b) nitrogen (f = 3.5 kHz, 8 slm); (c) He (f = 14 kHz, 8 slm); and (d) pseudoglow in He: voltage and current signals (f = 2 kHz, 8 slm).

Image of FIG. 3.
FIG. 3.

Calibration experiment: Temperature, T, measured by the FBG, Luxtron and a thermocouple, recorded in hot air up to ca. 120 °C. Note that the Luxtron data have been corrected by a constant ratio with respect to the thermocouple.

Image of FIG. 4.
FIG. 4.

Gas (translational) temperature, T, recorded in the apparatus of Figure 1(b) using the FBG instrument in helium, argon, and neon DBD; F = 200 sccm; f  = 15 kHz; d = 2.0 mm.

Image of FIG. 5.
FIG. 5.

Temperature variation as recorded by FBG for discharges in static air (filamentary) and 10 slm of flowing nitrogen (diffuse glow) in the apparatus of Figure 1(a); P ∼ 200 W, f = 10 kHz.

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/content/aip/journal/apl/100/20/10.1063/1.4719208
2012-05-17
2014-04-18
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Accurate in-situ gas temperature measurements in dielectric barrier discharges at atmospheric pressure
http://aip.metastore.ingenta.com/content/aip/journal/apl/100/20/10.1063/1.4719208
10.1063/1.4719208
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