Light at Extreme Intensities: Opportunities and Technological Issues of the Extreme Light Infrastructure, LEI 200--Proceedings of the Conference, Brasov, Romania, 16-21 October 200

The conference was the first important scientific event entirely dedicated to an European project - Extreme Light Infrastructure (ELI) which reassembled researchers of different countries with the aim of designing ELI and future experiments that can be carried out on the facility (http://www.eli-laser.eu). ELI, hosting the most powerful, exawatt-class laser in the world, will be able to address laser matter interaction in the ultra relativistic regime (>1024 W/cm2). The conference was focused on High Intensity and Ultrashort Pulse Lasers, Exotic Physics at High Laser Intensities, Secondary Sources of Particles, Secondary Sources of X-ray, Attosecond Generation and Applications.