Polychromatic radiation is delivered by a bending magnet. A VLS Plane Grating Monochromator (PGM) fills an elliptical glass capillary with light, which, in turn, focuses the light on to the sample. The transmitted signal is collected by an objective Fresnel Zone Plate and a magnified image is delivered to an X-ray CCD.

The following sketch shows the optical layout of the optics. A Kirkpatrick-Baez system focus light vertically (VFM) on to the entrance slit (Sin) and horizontally (HFM) on to the exit slit (Sout) of the vertically dispersive PGM. The monochromator works in standard imaging conditions with a constant slit-to-slit magnification in the dispersive plane of 1/cff = 1/2.25. It is constituted by a plane mirror PM and two varied line spacing gratings (VLS G), covering the whole energy range. An elliptical cylinder mirror (VRFM) will refocus the beam vertically onto the exit slit. The source is de-magnified horizontally by a factor of 3, and vertically by a factor of 3*2.25 times at the exit slit position.

The beamline layout including the Transmission X-ray Microscope is shown below: