Howard A. Padmore

TL;DR: In this paper, the authors directly measured metal impurity distributions and their chemical state in as-grown and fully processed polycrystalline silicon used for terrestrial-based solar cells using Synchrotron-based x-ray fluorescence mapping and xray absorption spectroscopy, both with a spatial resolution of lμm.

TL;DR: In this paper, the authors passon en revue certain demonstrations recentes permettant de produire des impulsions femtoseconde de rayons-X par interaction entre an impulsion laser femtoconde and un faisceau d'electrons relativistes.

TL;DR: In this paper, the possibilities of fabrication of gratings with resolving power of up to 106 for the 0.5 1.5 KeV energy range were studied, which corresponds to all or most of the useful dipole transitions for elements of interest in most correlated electronic systems, i.e., oxygen K-edge of relevance to all oxides, the transition metal L2,3 edges, and the rare earths.

TL;DR: In this paper, a beamline for high resolution spectroscopy with elliptically polarized X-rays is described, where a variable deviation angle plane grating monochromator is used to cover the entire energy range.

TL;DR: In this paper, a program of soft x-ray photoemission spectroscopy (XPS) has been used to measure the performance of the films and to understand film stoichiometry and the effects of surface termination.