The highest possible photon flux within the field of view of the microscope is necessary in order to achieve such high spatial resolution and maximize the collection efficiency. At typical working conditions of the microscope the field of view is about 3 –10 µm.
The UE49 PGM beam line allows full polarization control of the incoming beam-delivering light of circular, elliptical and horizontal polarization- in combination with a high transmittance and a careful refocusing of the photon beam. A dedicated elliptical refocusing mirror has been designed to achieving a foot print of the incoming x-ray beam on the sample of 10 μm (vertical) X 20 μm (Horizontal).
The spectral range covered extends from 80 to 1800 eV, with a spectral resolution of 10000 at 700 eV. The photon flux delivered into the focused spot ranges from 10e-11 to 10e-13 ph/s/100 mA.