2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/169512We give a brief overview of the most important QED effects that can be studied in the presence of extreme fields such as those expected at the Vulcan laser upgraded to a power of 10 Petawatts.8 pages, 10 figures, presented at Vulcan 10 PW upgrade meeting, 16 July 2008, Steventon, UKHigh Energy Physics - Phenomenologytext