Determination of plasma parameters in a jet of a gas-discharge source using an insulated probe system with cylindrical electrodes

The aim of this work is to develop a procedure for determining the ion dissociation degree and electron density in supersonic jet gas-discharge source collisionless plasma from results measurements current collected by an insulated probe system with transversely oriented cylindrical electrodes. Based on mathematical model collection asymptotic solution saturation region obtained previously, new computational formulas parameter determination are derived. It shown that, comparison single Langmuir probe, provides more information diagnosing laboratory plasma. effect reference electrode area ratio measurement errors accuracy studied numerically. Within framework collection, analysis made geometrical parameters method error using region. For degree, optimal values system’s bias potentials (probe ratio) found. adopted assumptions, reliability estimated as function potential (relative electrode) accuracy. may be used diagnostics acceleration electric field jet.