Abstract
Two-dimensional maps of atomic hydrogen fluorescence signal in reactive gas layers were produced using two-photon Laser Induced Fluorescence (LIF). The measurements were made in situ in conditions of diamond film chemical vapor deposition using a thermal inductively coupled plasma as the activation medium. In these conditions the reactive gas layer is typically a few millimeters thick and the temperature drops across the layer from 4000 K at the free stream boundary to about 1200 K at the substrate. The reactive layer exhibits strong chemical non-equilibrium. The two-photon laser emission at 205 nm was generated by frequency-tripling a pulsed dye laser output. The fluorescence signal was detected with an intensified CCD camera.
© 1998 IEEE
PDF ArticleMore Like This
J. Larjo, H. Koivikko, D. Li, and R. Hemberg
QThD60 International Quantum Electronics Conference (IQEC) 2000
Pauline Ho, William G. Breiland, and Michael E. Coltrin
THC4 Conference on Lasers and Electro-Optics (CLEO:S&I) 1987
U. Meier, K. Kohse-Höinghaus, L. Schäfer, and C.-P. Klages
WA3 Laser Applications to Chemical Analysis (LACSEA) 1990