The preliminary design of a monochromatic beamline for FLASH2 at DESY is presented. The monochromator is tunable in the 50-1000 eV energy range with resolving power higher than 1000 and temporal response below 50 fs over the whole energy range. A time-delay-compensated configuration using the variable-line-spacing monochromator design with two gratings is adopted: the first grating disperses th...

In a scanning transmission electron microscope (STEM), the elemental analysis at atomic resolution is realized by the combination with electron energy-loss spectroscopy (EELS), since an aberration corrected probe forming lens system enables us to obtain an electron probe sized about 0.1 nm [1]. In EELS, the energy resolution is mainly limited by the energy spread of the electron source, which i...

Powder diffraction patterns from SRM Si640b are used to calibrate the energy scale for two experiments using a monochromated synchrotron X-ray beam in the high energy region 38–50 keV. The energy of the beam is determined to accuracies between 0.0007% and 0.07% of the beam energy. Uncertainties in the energy scale are reduced by correcting for the zero offset angle of the monochromator crystal....