A second NanoMAX experimental station relying on Fresnel Zone Plate (FZP) focusing is currently under development. In its mature state, it will provide an X-ray beam focused down to a 30 nm spot, with a long term goal of 10 nm. The FZP endstation will rely on active positioning at the nanometer scale using optical interferometry and will provide a single rotation axis for tomographic measurements.
The FZP station will feature a large pixel detector in the forward direction for diffraction and coherent imaging methods. Two Silicon Drift Diode X-ray fluorescence detectors will be used for elemental mapping. The station will operate in vacuum and have liquid nitrogen cooling of the sample
Proposal call for commissioning experts
10 days of beamtime are planned for commissioning experiments on the imaging endstation. The experiments will likely be scheduled in June or July 2022.
We aim at accepting two commissioning expert proposals where the goal is to test the endstations capabilities regarding:
- X-ray fluorescence tomography
- X-ray ptychographic tomography
At that time of the commissioning experiments, the microscope will not be completed. Thus several limitations will have to be considered for the proposed commissioning experiments:
- The setup will be operated at room temperature and in air, meaning the X-ray paths from the sample to the detectors will also be through air.
- The setup will most likely be operated with prelimilary zone plates allowing for a resolution no better than 50 nm.
- With the choice of optics comes the upper limit for the incident photon energy of around 9 to 10 keV:
- The automatic sample changer will not be operational at that time of these first commissioning experiments.
- Figures for sensitivity and scanning speed (and thus possible sample size) are yet to be determined. As a rough estimate we suggest sample diameters around the 10 um mark. Samples will have to be mounted on OMNY pins (can be provided by the NanoMAX team in either Au coated Cu or pure Al).
- As 2D pixel detector an EIGER2 X 4M or a PILATUS 1M can be offered with detector distance in the range 0.5 – 5 meter.
If you are interested in submitting a proposal, contact the beamline staff (Maik Kahnt or Ulf Johansson) well in advance to discuss the feasibility of your experiment.