Cu target rotating anode with vertical line source and high-resolution Huber 2-circle diffractometer with Osmic Max-Flux multi-layer mirror wide band-pass monochromator, coupled to a postmonochromator stage for a (111), (220), or (400) Si 2-bounce channel-cut or(111) Ge 2-bounce collimator, SPEC software control, high-count rate s cintillation detector, automated beam attenuator and multi-channel analyzer fluorescence spectroscopy system.