2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/87908A kind of analysis of waveform of voltage pulse in small proportional counter is described. The technique is based on deconvolution of recorded pulse with a response function of the counter. It allows one to restore a projection of the track of initial ionization to the radius of the counter, or a charge collection function.4 pages, 2 Postscript figures, uses LaTeX with RevTeX, to be published in "Proceedings of X Baksan school: Particles and Cosmology, Apr 1999, Russia"Data Analysis, Statistics and ProbabilityAstrophysicsNuclear ExperimentInstrumentation and Detectorstext