In this paper we describe in detail the application of laser induced fluorescence (LIF) to the OH density measurement in a dielectric barrier discharge (DBD) at atmospheric pressure in Ar–H2O, He–H2O mixtures, and with small N2 additions. Measurements are reported in which OH density is measured in a pulsed DBD, together with its decay in the post-discharge. The variation of macroscopic discharge parameters, such as the applied voltage, the water vapour content, the gas mixture composition and the discharge duration, has a large effect on the OH loss rate and a smaller one on OH density. These effects are described and briefly discussed as a valuable help for the understanding of the complex microscopic kinetics of water containing discharges.
本論文では、誘電体バリア放電（DBD）におけるOH密度測定へのレーザー誘起蛍光法（LIF）の適用について詳細に述べる。Ar-H₂O、He-H₂O、およびN₂を微量添加した混合気体において、パルス放電中のOH密度と、放電後のOH密度の減衰を測定した。印加電圧、水蒸気含有量、ガス混合比、放電持続時間などの巨視的放電パラメータの変化は、OHの消失速度に大きな影響を及ぼす一方、OH密度自体への影響は比較的小さいことが明らかになった。これらの影響について考察し、含水放電における微視的動力学の理解に有用な知見を提供する。