Method of X-ray detection by a proportional chamber with high accuracy in both coordinates

Avalanches in a proportional chamber do not surround anode wires in a uniform way, leading to the asymmetry of the distribution of the induced charges. The method of X-ray detection with high accuracy in both coordinates is proposed. In this work in the chamber, filled with the wide spread gas mixture Ar + 20% CO2, the dependence of the induced charge asymmetry on the high voltage and source position have been measured and comparison between the experimental result and the numerical calculation has been carried out. The possibility of the particle coordinate measurement in a direction perpendicular to anode wires is considered. (Auth.)