Application of Laser Optogalvanic spectroscopy (LOGS) to practical combustion systems requires immersion of the electrode into the plasma. Studies were therefore performed to investigate the effect of electrode corrosion on the normalized LOGS signal intensity at a fixed wavelength (578.238 nm). During six-hour experiments in a near-stoichiometric flame, the normalized LOGS signal intensity decreased by 40-50percnet for a -960 V rod electrode and by 10-20percent for a -500 V rod electrode. These changes are attributed to buildup of an oxide coating on the electrode, reducing the collection effeciency of the electrode.
展开▼
