Asymmetry of Cyclotron Resonance Lines in the Reaction Zones of Low-Pressure Acetylene and Cyanogen Flames

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Abstract
A marked asymmetry and shift of line maximum (at 17 000 gauss) by more than 100 gauss is reported for cyclotron resonance lines obtained in or very close to the reaction zones of low‐pressure flames containing high concentrations of free electrons. The effect is interpreted in terms of the variation of the real part of the refractive index of the flame plasma, at microwave frequencies, in the neighborhood of the absorption line. The electron concentration gradients in the vicinity of the reaction zone then have the effect of refracting the microwaves traversing the finite thickness of the plasma towards or away from the microwave receiver.

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