Journal
IEEE TRANSACTIONS ON PLASMA SCIENCE
Volume 42, Issue 5, Pages 1206-1210Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TPS.2014.2306921
Keywords
Atmospheric pressure plasma; biomedical application; laser-induced fluorescence (LIF); nonequilibrium plasma; OH; plasma jet; plasma medicine; pulsed discharge; reactive species
Categories
Funding
- National Natural Science Foundation [51077063, 51277087]
- Research Fund for the Doctoral Program of Higher Education of China [20100142110005]
- Chang Jiang Scholars Program, Ministry of Education, China
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For room-temperature atmospheric pressure plasma jets (RT-APPJs), because of the gas flow, the OH density at a given position is different from the case without the gas flow. In this paper, an OH density decay model, which includes the main loss processes of OH and gas flow effect, is present. Based on the model, the simulation results have a very good agreement with the OH decay behavior measured by laser-induced fluorescence. The absolute OH density of the RT-APPJ is obtained when the best fit is achieved, which is about 2.4 x 10(13) cm(-3) at 5 mm away from the plasma jet nozzle and 1 mu s after the discharge. In addition, to control the OH density, the effect of voltage polarity, applied voltage magnitude, pulse frequency, pulsewidth on the OH density is also investigated and discussed.
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