Setup of an 8 keV laboratory transmission x-ray microscope

This article presents a concept and the first results for the setup of an 8keV laboratory transmission x-ray microscope with a polycapillary optic as condenser at the BliX in Berlin. The incentive of building such a microscope is that the penetration depth for hard x-rays is much higher than in the soft x-ray range, e.g. The water window. Therefore, it is possible to investigate even dense materials such as metal compounds, bones or geological samples. The future aim is to achieve a spatial resolution better than 200 nm

Setup of an 8 keV laboratory transmission x-ray microscope

This article presents a concept and the first results for the setup of an 8keV laboratory transmission x-ray microscope with a polycapillary optic as condenser at the BliX in Berlin. The incentive of building such a microscope is that the penetration depth for hard x-rays is much higher than in the soft x-ray range, e.g. the water window. Therefore, it is possible to investigate even dense materials such as metal compounds, bones or geological samples. The future aim is to achieve a spatial resolution better than 200 nm

temporary implementation and testing of a confocal sr μxrf system for bone analysis at the x ray fluorescence beamline at elettra

Abstract The confocal μ XRF spectrometer of Atominstitut (ATI) was transported and set up at the X-ray Fluorescence beamline at Elettra - Sincrotrone Trieste. It was successfully adjusted to the incoming beam (9.2 keV). Test measurements on a free-standing Cu wire were performed to determine the size of the focused micro-beam (non-confocal mode, 56 × 35 μ m 2 ) and the size of the confocal volume (confocal mode, 41 × 24 × 34 μ m 2 ) for the Cu–K α emission. In order to test the setup's capabilities, two areas on different human bone samples were measured in confocal scanning mode. For one of the samples the comparison with a previous μ XRF measurement, obtained with a low power X-ray tube in the lab, is presented

Erratum Polycapillary boosted instrument performance in the extreme ultraviolet regime for inverse photoemission spectroscopy erratum

We correct values and figures for the resolution of the spectrometer, as proposed in [Opt. Express 25, 31840 2017 ]. The new results take into account previously unknown, incoherent phase fluctuations, caused by the polycapillary lens PCL , and estimate the realistic performance of the instrumen

Polycapillary boosted instrument performance in the extreme ultraviolet regime for inverse photoemission spectroscopy

A collimating polycapillary half lens, traditionally used in the medium and hard X-ray band, is operated at a photon energy of 36 eV for the first time. While the transmission still exceeds 50%, the measured and simulated spatial resolution and angular divergence approach 0.4 mm or less and at most 20 mrad, respectively. This unexpected, superior performance of the polycapillary optic in the extreme Ultraviolet could enable the design of an e cient, versatile and compact spectrometer for inverse photoemission spectroscopy (IPES): Its wavelength-dispersive component, a customized reflection zone plate, can maintain an energy resolution of 0.3 eV, whereas the sensitivity may be enhanced by more than one order of magnitude, compared to conventional spectrometers. Furthermore, the overall length of 0.9 m would allow for an eased alignment and evacuation. We see a significant potential for numerous polycapillary-based XUV / soft X-ray instruments in the future, in particular after further optimization for this long wavelength regime

Increasing the sensitivity of micro X ray fluorescence spectroscopy through an optimized adaptation of polycapillary lenses to a liquid metal jet source

The combination of brilliant liquid metal jet sources LMJS and polycapillary lenses yields substantial advantages in the excitation efficiency of traces of transition metals by micro X ray fluorescence spectroscopy amp; 956;XRF and confocal amp; 956;XRF in the laboratory. We show, that it is possible to especially adapt the parameters of polycapillary lenses to achieve an optimized performance in transmission and exit focal spot size. Furthermore, we demonstrate an energy dependent influence of the source spot size on the effective transmission of the lenses, which increases with decreasing field of view of the polycapillary lenses. A measurement on a mussel foot cross section using a amp; 956;XRF setup with a specially designed polycapillary lens in combination with the LMJS shows a significant increase of the excitation efficiency for vanadium. A 24 times higher net peak fluorescence intensity for V K radiation is achieved resulting in well defined and detailed vanadium structures compared to measurements performed with a state of the art amp; 956;XRF setu

Toward sub-micro-XRF working at nanometer range using capillary optics

Capillary optics are used for X ray fluorescence micro analysis using the Cu K line provided by a rotating anode. The excitation beam is focused using a polycapillary lens on a Co Ti sample. Cylindrical glass capillaries of various diameters are fitted to the X ray detector Energy Dispersive X Ray EDX analyzer and displaced along the irradiated zone of the sample. The fluorescence is studied as a function of capillary position. Good agreement is found between experimental and calculated lateral widths of the fluorescence collection, taken into account the cylindrical capillary critical angles relevant in the experiment. The influence of the cylindrical capillary diameter on the signal level detected is studied to estimate the possibility of lateral resolution increase of X ray fluorescence technique both in lab and in synchrotron environmen

Feasibility of simultaneous surface topography and XRF mapping using Shear Force Microscopy

Marketed sources equipped with polycapillary optics allow now laboratory X Ray Fluorescence XRF analysis with 5 10 m lateral resolution. To improve it, we had the idea to use a thin cylindrical X ray capillary fitted to the XRF detector. The combination with near field microscopy would then lead to a simultaneous record of both topography and XRF from a sample at m lateral resolution. For this purpose, we have built a home made Shear Force Microscope to carry out this experiment in the future.In a first step, we have validated the microscope, operating in SNOM configuration, using test sample consisting in ZnO clusters deposited on a Si3N4 grating. Second, the feasibility of XRF collection through a thin X ray cylindrical capillary on Co Ti sample is shown in this work. The results suggest that sub 1 m in lab XRF analysis is possible, replacing the optical fibre of our SNOM apparatus by an X ray capillary. On the basis of modelling our results, we then further discuss the possibility to reach 100 nm XRF resolution, combined to surface topography, working in synchrotron environmen