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Figure 1
Schematic of the focusing setup used at the XPP instrument. The X-ray beam is focused by either a single set of beryllium compact refractive lenses nominally located 4 m upstream of the sample (labeled as `primary focusing') or by two sets of lenses installed 4 m and 0.25 m upstream of the sample (`primary' and `secondary' focusing). Both lenses are installed on motorized stages to allow translation along the beam propagation direction by [\Delta z_{1}] and [\Delta z_{2}], respectively.

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
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