mySpot: a versatile microfocussing station for scanning methods at BESSY II

Abstract

mySpot is a versatile microfocussing station for scanning methods with resolution down to 1.5 µm, providing a combination of methods which can be performed simultaneously at the same sample position. It is especially designed (but not limited to) for the study of hierarchically structured biological samples. Structural information from di erent length scales (XRD -crystalline, SAXS -nanometer, Video-microscope -micrometer, sample translation -milimeter) can be combined with chemical information (XRF-mapping, EXAFS, XANES) and molecular information (Raman) providing unique insight into the mutual dependencies of di erent parameters. The beamline provides focal spot of about 500 x 50 µm, which can be refocused at the sample using capillary optics. Capillary optics is used for two main reasons: 1) the focal spot does not depend on the energy which makes EXAFS and XANES measurements very simple, and 2) the optics is positioned very close to the sample which improves the stability of the focus at the sample. This allows the focal spot of 1.5 µm in 2D scans, as well as very parallel beam for scattering experiments down to 10 µm, or volume element of 20 µm diameter for 3D XRF mapping. IntroductionMany natural and human made materials are hierarchically structured from macroscopic dimensions down to the molecular and atomic level. Important structural properties of such structured materials can be studied using X-ray spectrometry and scattering using an X-ray beam focused to a micrometer spot. Spectrometric methods deliver information about the chemical composition and oxidation states, whereas the scattering methods deliver information on the structure in nanometre range and atomic level. Combining these techniques with the scanning, complex hierarchical structures can be studied * Cite article as: Helmholtz-Zentrum Berlin für Materialien und Energie. (2016). mySpot: a versatile microfocussing station for scanning methods at BESSY II. Journal of large-scale research facilities, 2, A101. http://dx

Combinatorial inkjet printing for compositional tuning of metal-halide perovskite thin films

“…The combinatorial libraries were characterised by UV/vis transmittance measured using a custom-built mapping setup, photoluminescence (PL) through a microscope, confocal laser scanning microscopy (CFLSM) performed with a LEXT OLS4100, scanning electron microscopy (SEM), X-ray fluorescence (XRF) measured with a Bruker M4 Tornado and GIWAXS, performed at the μSpot beamline at BESSY II. 43 The UV/vis transmittance was measured with white light illumination from a fibre-coupled halogen lamp, collected in an integrating sphere and measured by using a charge coupled device (CCD) spectrometer. The photoluminescence was excited by using a fibre-coupled 470 nm Thorlabs M470F3 LED driven at 1 A through a 40× objective and measured with a CCD spectrometer for 60 s per sample.…”

Primary radiation damage in bone evolves via collagen destruction by photoelectrons and secondary emission self-absorption

“…Synchrotron-based XRD and XRD- μ CT measurements were performed at the mySpot beamline of the BESSY II synchrotron light source (HZB – Helmholtz-Zentrum, Berlin, Germany 58 ). A Dectris M9 Eiger detector with an image size of 3269 × 3110 and a lateral pixel size of 75 μm was used.…”

In situ investigation of controlled polymorphism in mechanochemistry at elevated temperature

“…Time-resolved in situ (TRIS) 43 PXRD measurements were performed at the μ-spot beamline 50 at BESSY-II (Helmholtz-Zentrum Berlin für Material und Energie). Monochromatic radiation with λ = 0.7314 nm (16.95 keV) was used, and each PXRD pattern was obtained by accumulating the scattering intensities for 5 s. The position of the mill was selected so that the X-ray beam passed through the shortest length of the jar to minimize artificial peak broadening.…”