A 280 G linear magnetic field sustained a 2.5 mm diameter stable hydrogen plasma column produced by a duoplasmatron plasma cathode. A high-intensity magnetic field created by a pair of permanent magnets and the field compression structure realized the passage of a dense plasma flow through a 2 mm diameter hole. Both ions and electrons can be extracted from the downstream plasma where a linear magnetic field can be induced to guide the plasma for striking a tungsten target. Luminous intensity distribution around a tungsten target located at another end of the magnetic field confronting to the plasma cathode was examined. A substantial reduction in the Hα line spectral broadening was observed that enabled a precise spectroscopic study of the hydrogen particle reflection at the solid target surface.
Doppler-broadening of the Hα emission spectra from hydrogen reflected at surfaces of palladium and tungsten sheet metal surfaces held at clamp holders were presented in this study. The reflected hydrogen atoms were observed with velocity components produced by the back scatterings of H + 3 , H + 2 and H + ion incident regions. Palladium exhibited higher spectrum emission intensities than tungsten for both clamp structures. Modification of the clamp structure should produce cooler surface condition due to direct contact of metal surface to the substrate holder thus having H atoms adsorbed more on the palladium sheet.
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