Abstract
Propagation was studied of the ionization front of the gas discharge sustained by the microwave surface wave in a quartz tube filled with low-pressure air. In a wide pressure range, the characteristic propagation velocities of the discharge front were measured, as well as the parameters of the stationary plasma column. The experimental results obtained are in satisfactory agreement with the discharge propagation model based on the concept of nonlocal electron heating in the plasma resonance region. The electrodynamic characteristics of the discharge were studied and the electron density averaged over the cross section of the plasma column was measured. Based on the experimental measurements of the ionization and electron loss rates, the electric field distribution was estimated in the ionization front region.
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