2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/42060In this paper we consider the process of "subthreshold" electron-positron pairs creation in the region of laser conversion. The total number of positrons and their distribution are obtained. This phenomena is offered for use as a good test to examine nonlinear effects of quantum electrodynamics on TESLA.LaTex, 9 pages, 7 Postscript figuresHigh Energy Physics - Phenomenologytext