Waveguide optogalvanic device

In the paper an optogalvanic experiment is described. A tunable dye laser irradiates discharge plasma in neon and the change of the plasma density is measured by microwave technique. The paper describes also the theoretical method which gives the change of the plasma impedance in relation to the measured signal. Finally the measuring method, the theoretical predictions for optimizing the method and the proposed approximations were experimentally checked.