Figure 1
Two scans of beam position are shown for a vertical X-ray beam width of 18 µm FWHM scanned through a 10 µm vertical slit opening (a) and a 40 µm FWHM beam width through a vertical slit opening of 40 µm (b). The right-hand ordinate gives the mean intensity and is shown by the small red circles. The left-hand ordinate shows the FWHM intensity fluctuation and is plotted with blue triangles. |