Experimental demonstration of a synthetic aperture compression scheme for multi-Petawatt high-energy lasers

International audienceWe present the experimental demonstration of a subaperture compression scheme achieved in the PETAL (PETawatt Aquitaine Laser) facility. We evidence that by dividing the beam into small subapertures fitting the available grating size, the sub-beam can be individually compressed below 1 ps, synchronized below 50 fs and then coherently added thanks to a segmented mirror. " Split-aperture laser pulse compressor design tolerant to alignment and line-density differences

Concentrated photovoltaic thermal (CPVT) solar collector systems: Part I – Fundamentals, design considerations and current technologies

Concentrated photovoltaic thermal (CPVT) solar collectors have been gaining ever-increasing attention from the scientific community and industrial developers due to their promising potential to pave the way for the penetration of solar energy into modern day power generation technologies. CPVTs' flexibility, manufacturability, high efficiency, and multi-output nature inspired many innovative designs and design improvements available in the literature. In this study, a comprehensive, up-to-date review of the governing scientific basics, system variations, and technological advances in CPVT systems will be presented. The study is split into two parts. The first part covers CPVTs' characteristics and design considerations in addition to a review of the principals and technological advances in the solar components that compose a CPVT (i.e., photovoltaic cells, solar thermal collectors, concentrator optics, tracking mechanisms, concentrated photovoltaics, and concentrated solar thermal systems). While the second part thoroughly covers CPVTs' published studies, application areas, performance assessment, commercial initiatives, and research prospects.</p