Title :
Observation of ground-state OH by LIF technique in DC nozzle-to-plate positive streamer coronas
Author :
Kocik, Marek ; Mizeraczyk, Jerzy ; Kanazawa, Seiji ; Kajiwara, Atsushi ; Kumagai, Jun-ichi ; Ohkubo, Toshikazu ; Nomoto, Yukiharu ; Chang, Jen-Shih
Author_Institution :
Inst. of Fluid Flow Machinery, PAS, Gdansk, Poland
Abstract :
In this study, the planar LIF detection of the hydroxyl (OH) radicals was performed in a nozzle-to-plane electrode system having an electrode gap of 30 mm during the steady-state positive streamer corona discharge at atmospheric pressure. For monitoring the ground-state OH radicals, OH transition at 282 nm was used. The two-dimensional OH distribution in the DC corona discharge in air/H2O/Ar mixture was measured. The obtained results showed that the ground-state OH radical is generated mainly in the filamentary part of the streamers. The spontaneous emission of OH molecules excited by the streamer plasma was also recorded and compared to the LIF signal used for the detection of the ground-state OH molecules.
Keywords :
corona; discharges (electric); fluorescence; laser beam applications; oxygen compounds; DC nozzle-to-plate positive streamer coronas; LIF technique; atmospheric pressure; electrode gap; ground-state OH; hydroxyl radicals; monitoring; nozzle-to-plane electrode system; streamer plasma; Atmospheric-pressure plasmas; Corona; Electrodes; Gas lasers; Inductors; Plasma chemistry; Plasma diagnostics; Plasma materials processing; Plasma measurements; Pollution measurement;
Conference_Titel :
Industry Applications Conference, 2004. 39th IAS Annual Meeting. Conference Record of the 2004 IEEE
Print_ISBN :
0-7803-8486-5
DOI :
10.1109/IAS.2004.1348416
