We are frequent users of several large scale instrumental facilities, mostly Soleil (french national Synchrotron X-ray source, located on plateau de Saclay), European Synchrotron Radiation Facility (european Synchrotron X-ray source, one of the largest in the world, located in Grenoble), European X-FEL (european X-ray free electron laser source, located in Hambourg), Omega laser (Rochester, US).