Figure 4
The calculated integrated reflectivity (a) and energy bandwidth (c) for a double 3 mm-thick Si (111) reflection as a function of the asymmetry angle, and measured photon flux density (b) and energy bandwidth (d) at the sample position of the LLM (asymmetry angle of 36°) in Rowland circle geometry with an unfocused beam. The apparent irregular behaviour of the photon flux curve is due to the selection of different undulator harmonics. |