Hard x-ray imaging by Multilayer Zone Plates
Combined Optics and Sample Tower
Motorisation
Degrees of freedom for sample and optics are limited to
essentials, in order to minimise drift and vibrations. The
MZP is aligned to the x-ray beam in translation
(xyz) with a set of SmarAct SLC–1730 motors,
and in rotation (yrot, zrot) with a modified
SmarAct STT–12.7 mirror Gimbal mount. For travel ranges and
precision see the following table.
| what | motor | directions | range | can do |
|---|---|---|---|---|
| MZP lateral align | SLC1730 | x,y,z | 21 mm | few nm |
| MZP rotation align | STT-12.7 | yrot,zrot | ±5° | sub-mrad |
| sample align | M-686 | x,y | 25 mm | sub-µm |
| sample align | N-765 | z | 6.5 mm | few nm |
| sample scan | P-733 | y,z | 30 µm | sub-nm |
The sample is mounted on a fast and stiff Physik Instrumente
P–733 piezo scanner that can in principle do
> 100 Hertz. Alignment and selection of the
sample is possible by an xy stage on the
basement and a z lifting stage, both by PI.
3D rendering of the combined optics–sample granite.
The combined optics–sample tower rests on a 50 kg granite, which is inserted into the GINIX setup as a high-resolution tower. The MZP setup described here is one of currently three setups, complementing experiments for 2D waveguide (WG) imaging and 3D WG tomography.
Sample Motorisation for coarse xyz and fast yz scanning (Rendering).
These three setups bring optics (waveguide, multilayer zone plate) and sample on a common ground; we trade flexibility and ease of change (one of the strengths of GINIX) for robustness and stiffness, to decrease vibrations and increase imaging resolution.