Regensburg 2022 – wissenschaftliches Programm
KFM 25.7: Poster
Donnerstag, 8. September 2022, 15:00–18:00, P2
Hydrostatic high-pressure cells for X-ray scattering applications — •Kevin Lehninger1, Christian Sternemann1, Michael Paulus1, Bridget Murphy1, Metin Tolan1, and Lutz Feldmann2 — 1Fakultät Physik/DELTA TU Dortmund, 44221 Dortmund, Deutschland — 2Fakultät Physik/Konstruktionsbüro TU Dortmund, 44221 Dortmund, Deutschland
Small angle and wide angle X-ray scattering (SAXS/WAXS) at moderate pressures are of increasing relevance for the study of e.g. protein denaturation and stimuli responsive materials, respectively. One of the experimental challenges here is the precise pressure control in the pressure range up to 10 kbar while separating the sample volume from the pressure transmitting medium. For this purpose, we present two dedicated hydrostatic high pressure cells designed for use at beamlines BL2 and BL9 of the DELTA synchrotron radiation source that use water for pressure transmission. The WAXS cell with an opening angle of 60 degrees allows a sample volume with a cross-sectional area of one square millimeter that can be exposed to a maximum pressure of 5000 bar. The sample volume is enclosed in a flexible capillary tube which is placed between two diamond windows and can have a maximum diameter of 1.5 mm. The SAXS cell can be operated up to a pressure of 10000 bar providing an opening angle 20 degrees. Here the sample volume is contained in a cylinder sealed by polyimide film which is screwed into the high pressure cell by a slide system.