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Schematic diagram of the experimental setup. Hydrogen is injected independently through an organometallic injector and the spectrum is recorded behind the plasma cavity.
Emission spectra of the RF plasma source in high brightness mode, (a) without and (b) with hydrogen in the GSMBE chamber; (c) emission spectra of the RF plasma source in low brightness mode with hydrogen in the GSMBE chamber.
Dependence of the emission line intensity with the hydrogen partial pressure of the GSMBE chamber. The measurements are obtained by varying RF power and for a constant nitrogen partial pressure of ( flow at ).
Ratio of intensities with the flow of the RF plasma source, for a constant hydrogen partial pressure of in the GSMBE chamber. The dashed line is for eye guidance.
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