
Characterization of the new HE grating
The quantitative good agreement between the measured and calculated results shows the high quality of the grating. We also measured the 2nd order diffraction efficiency in order to know how the 2nd order intensity is suppressed. For lower photon energy, 170 degrees deviation angle was chosen, and for higher photon energy, 175 degrees deviation angle was chosen, which are the same geometries as our monochromator.