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Solution to the perturbation of LIF measurements via photodissociation, OH measurement in atmospheric‐pressure multihollow DBD
Author(s) -
Dvořák Pavel,
Procházka Vojtěch,
Krumpolec Richard,
Zemánek Miroslav
Publication year - 2020
Publication title -
plasma processes and polymers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.644
H-Index - 74
eISSN - 1612-8869
pISSN - 1612-8850
DOI - 10.1002/ppap.202000020
Subject(s) - photodissociation , radical , atmospheric pressure , dielectric barrier discharge , laser induced fluorescence , laser , atmospheric pressure plasma , plasma , analytical chemistry (journal) , chemistry , dielectric , atomic physics , materials science , photochemistry , optics , optoelectronics , physics , environmental chemistry , organic chemistry , quantum mechanics , meteorology
This study solves the problem of the invasivity of laser‐induced fluorescence (LIF) measurements caused by photodissociation. It is shown with the example of OH LIF that the excess signal caused by laser‐induced photodissociation can be distinguished from the true LIF signal of the naturally presented species by its different dependence on the energy of laser pulses. This fact can be further used for the detection of photodissociable species not accessible by the standard LIF. This method is applied to OH radicals in atmospheric‐pressure multihollow dielectric barrier discharge plasma ignited in a number of holes. OH radicals are concentrated at the effluents of these holes, but they are able to spread to a distance of 5 mm, meaning that the discharge is suitable for the treatment of distant and rough surfaces.