Two-photon excited LIF determination of H-atom concentrations near a heated filament in a low pressure H(2)environment.
With respect to the investigation of low pressure filament-assisted chemical vapor deposition processes for diamond formation, absolute concentrations of atomic hydrogen were determined by two-photon laserinduced fluorescence in the vicinity of a heated filament in an environment containing H(2) or mixtures of H(2)and CH(4). Radial H concentration profiles were obtained for different pressures and filament temperatures, diameters, and materials. The influence of the addition of various amounts of methane on the H atom concentrations was examined.
Meier
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U
Kohse-Hoinghaus
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K
Schafer
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L
Klages
C P
CP