HESS - The High Energy Stereoscopic System

Proceedings edition under the auspices of the International Union of Pure and Applied Physics (IUPAP) The HESS collaboration is planning to build a large Imaging Atmospheric Cherenkov Telescope (IACT) arrayin the Southern Hemisphere in the Khomas Highland of Namibia. In its final stage, the HESS experiment willhave up to 16 telescopes each with a 80 m reflector and a high resolution camera. The schedule foresees tostart with scientific operation of the first 4-telescope subsystem in 2002 (Phase 1).HESS will have a detection threshold of about 40 GeV and an angular resolution of less than a few arcmin-utes. The flux sensitivity above 100 GeV of 10