Measurements of density, surface recombination coefficient, and diffusion coefficient of hydrogen atoms by Lα laser fluorescence spectroscopy
- 1 December 1985
- journal article
- research article
- Published by AIP Publishing in Review of Scientific Instruments
- Vol. 56 (12), 2213-2216
- https://doi.org/10.1063/1.1138401
Abstract
The technique of laser fluorescence spectroscopy at the Lyman‐alpha (Lα) wavelength in hydrogen was used to measure the temporally and spatially resolved atomic density, the surface recombination coefficient γ, and the diffusion coefficient DH,H2 of the atomic hydrogen in molecular hydrogen. At the same time, it revealed a temporal change of γ, probably due to the change of surface number density of trapped hydrogen atoms. The present technique provides a new and powerful means for determinations of values associated with hydrogen atoms by absolute and local measurements of the atoms at the detection limit of extremely low concentrations.Keywords
This publication has 11 references indexed in Scilit:
- Determination of Atomic Hydrogen Density by Lyman-Alpha Laser Fluorescence SpectroscopyJapanese Journal of Applied Physics, 1985
- Measurements of Atomic Hydrogen-Density Profiles in the RFC-XX-M Machine Using Laser Fluorescence Spectroscopy at the Hα TransitionJapanese Journal of Applied Physics, 1985
- Developments and applications of laser-fluorescence for studies of particle-behaviours in plasma-surface interactionsJournal of Nuclear Materials, 1984
- Development of Coherent Lyman α Light Source for High Temperature Plasma DiagnosticsThe Review of Laser Engineering, 1984
- A comparison between laser induced fluorescence at Balmer-alpha and at Lyman-alpha for the measurement of neutral hydrogen densities in magnetically contained fusion plasmasPlasma Physics, 1983
- Translational energy distribution and production mechanism of H* and D* produced by controlled electron impact on water and heavy waterThe Journal of Chemical Physics, 1983
- Plasma-surface interactions in tokamaksNuclear Fusion, 1979
- Production of H-atom and O-atom beams by a cooled microwave discharge sourceReview of Scientific Instruments, 1977
- An experimental determination of the photoabsorption cross section of atomic hydrogenProceedings of the Physical Society, 1965
- Studies of Atomic Recombination of Nitrogen, Hydrogen, and Oxygen by Paramagnetic ResonancePhysics of Fluids, 1962