The spatial distribution of the temperatures and the emitted spectrum in the electrolyte cathode atmospheric glow discharge

Abstract

In an electrolyte cathode atmospheric glow discharge (ELCAD), the gas temperature (Tgas) obtained from the intensity ratio of the OH 306–309 nm unresolved rotational band heads and the electron temperature (Tel) received from the intensity ratio of the Cu I 510.5 and 515.3 nm were investigated. In the near anode region, Tgas ≈ Tel ≈ 6000 K; in the positive column, Tgas ≈ 4000 K, Tel ≈ 5500 K; in the near cathode region, Tgas ≈ 8000 K, Tel ≈ 7500 K were found. These temperatures agree with our earlier results and are in accordance with the literature; that is, at atmospheric pressure, the gas and the electron temperatures approximate well with each other. The spatial intensity distribution of the atomic lines of metals dissolved in the electrolyte was measured and the intensity maximum occurred in the negative glow due to the high electron temperature and thus to the high excitation rate of this region.

Measurement of temporal and spatial resolved rotational temperature in ignition sparks at atmospheric pressure

“…This area has a rotational temperature of 3000 K to 3150 K ± 250 K, independent from the dwell time. The trend of the rotational temperature is similar to the trend found in [44].…”

Achieving reactive species specificity within plasma‐activated water through selective generation using air spark and glow discharges

“…The gas temperature in the concentrated narrow spark channel is higher than the temperature in the glow phase. In the spark discharge the rotational and vibrational temperatures would be in the higher range of 3000–4500 K and 4000–5000 K, respectively . The higher temperature in the spark discharge favors the formation of in the gas phase, which results in the higher concentration of in SDPAW.…”

Time resolved optical emission spectroscopy in power modulated atmospheric pressure plasma jet

“…The 1 st negative system does not react even to 80 Hz modulation. It then follows that equilibrium between rotations and translations is not established even after 10 ms. Discrepancies between rotational temperature of OH and N 2 have been also reported in vapour-air bubbles in liquids [42,43] and in the near electrode region of at atmospheric pressure glow discharges with liquid electrodes [44][45][46].…”