Accession Number : ADA598834


Title :   Measurement of Hydroxyl Radicals in Plasma Pencil by Laser Induced Fluorescence


Descriptive Note : Conference paper


Corporate Author : MASARYK UNIV BRNO (CZECHOSLOVAKIA)


Personal Author(s) : Vorac, J ; Dvorak, P ; Prochazka, V


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a598834.pdf


Report Date : Jul 2013


Pagination or Media Count : 4


Abstract : Laser induced fluorescence was used for measurement of concentration of hydroxyl (OH) radicals in the plasma pencil, which is a radiofrequency plasma jet operated in argon at atmospheric pressure. The problematic of the rotational energy transfer, spectral overlap of the laser line and hydroxyl absorption line and saturation effects were treated. The method was calibrated by Rayleigh scattering on the ambient air. The concentration of hydroxyl radicals in the effluent of the plasma pencil was found to be in the order of 10(expn 20) m(expn -3). Dependence of hydroxyl concentration on argon ow rate and RF power delivered to the plasma were measured. Thy hydroxyl concentration was maximum at conditions, when the measurement point was close to the tip of the visible active discharge.


Descriptors :   *HYDROXYL RADICALS , *LASER INDUCED FLUORESCENCE , *PLASMAS(PHYSICS) , ABSORPTION SPECTRA , CONCENTRATION(CHEMISTRY) , ENERGY TRANSFER , LASERS , LINE SPECTRA , RADIOFREQUENCY POWER


Subject Categories : Inorganic Chemistry
      Radiation and Nuclear Chemistry
      Plasma Physics and Magnetohydrodynamics


Distribution Statement : APPROVED FOR PUBLIC RELEASE