Berlin 2024 – scientific programme
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KFM: Fachverband Kristalline Festkörper und deren Mikrostruktur
KFM 9: KFM Poster Session
KFM 9.27: Poster
Monday, March 18, 2024, 18:00–20:00, Poster E
High pressure hydrostatic cells for X-ray scattering applications — •Kevin Lehninger1, Michael Paulus1, Christian Sternemann1, and Patrick Degen2 — 1Fakultät Physik/DELTA, Technische Universität Dortmund, 44221 Dortmund, Germany — 2Carl Bechem GmbH, 58089 Hagen, Germany
Small-angle and wide-angle X-ray scattering (SAXS/WAXS) at moderate pressures are of increasing importance for the investigation of e.g. protein denaturation or stimulus-responsive materials. One of the experimental challenges are the precise pressure control in the pressure range up to 10 kbar with simultaneous separation of the sample volume from the pressure-transmitting medium at the largest possible opening angle. We present a pressure- and temperature dependent SAXS/WAXS study of greases and motivate two hydrostatic high-pressure cells dedicated for use at beamlines BL2 and BL9 of the DELTA synchrotron radiation source (Dortmund, Germany). The WAXS c ell with an opening angle of 60 degrees enables a sample volume with a cross-sectional area of one square millimetre to be exposed to a maximum pressure of 5 kbar, while the SAXS cell can be operated up to a pressure of 10 kbar, providing an opening angle of 20 degrees.
Keywords: metal soap; X ray; lithium grease; SAXS; WAXS