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YANG Fuxiang (杨富翔), MU Zongxin (牟宗信), ZHANG Jialiang (张家良). Discharge Modes Suggested by Emission Spectra of Nitrogen Dielectric Barrier Discharge with Wire-Cylinder Electrodes[J]. Plasma Science and Technology, 2016, 18(1): 79-85. DOI: 10.1088/1009-0630/18/1/14
Citation: YANG Fuxiang (杨富翔), MU Zongxin (牟宗信), ZHANG Jialiang (张家良). Discharge Modes Suggested by Emission Spectra of Nitrogen Dielectric Barrier Discharge with Wire-Cylinder Electrodes[J]. Plasma Science and Technology, 2016, 18(1): 79-85. DOI: 10.1088/1009-0630/18/1/14

Discharge Modes Suggested by Emission Spectra of Nitrogen Dielectric Barrier Discharge with Wire-Cylinder Electrodes

Funds: supported by National Natural Science Foundation of China (Nos. 11475040, 11375041) and the Fundamental Research Funds for the Central Universities (No. DUT14ZD[G]04)
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  • Received Date: August 31, 2015
  • In this paper, nitrogen dielectric barrier discharge (DBD) plasma was generated in a quartz tube with coaxial wire-cylinder electrodes at atmospheric pressure. By varying the nitrogen gas flow (FN ) in the range of 0-1m 3/h, the plasma optical emission spectra (OES) were measured and studied. The vibration (Tvib) and rotation temperature (Trot) of nitrogen were obtained, by fitting the rovibronic bands of N2(C3Πu -B3Π g, 0-1), and by the Boltzmann plot method for purposes of comparison. Tvib increased up to 2481 K with increasing nitrogen flow till 0.2 m3/h, and then decreased with further increasing FN, while Trot decreased monotonously and approached to ∼350 K for FN ≥0.6m3/h. The intensity of N2(C3Πu-B3Πg, 0-0, 1-0, 0-3) and N2+(B2Σu+ -X2Σ+g, 0-0) exhibited similar evolution with increasing FN to those of the Tvib and Trot, respectively. The discharge photos revealed that the discharge filaments gradually decreased with increasing FN, and eventually disappeared, which implied that a discharge mode transition emerged with increasing FN . The possible mechanism for the discharge mode transition is studied in detail according to the vibration (Tvib) and rotation temperature (Trot) of nitrogen.
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