Extreme conditions research using the large-volume press at the P61B endstation, PETRA III


Penetrating, high-energy synchrotron X-rays are in strong demand, particularly for high-pressure research in physics, chemistry and geosciences, and for materials engineering research under less extreme conditions. A new high-energy wiggler beamline P61 has been constructed to meet this need at PETRA III in Hamburg, Germany. The first part of the paper offers an overview of the beamline front-end components and beam characteristics. The second part describes the performance of the instrumentation and the latest developments at the P61B endstation. Particular attention is given to the unprecedented high-energy photon flux delivered by the ten wigglers of the PETRA III storage ring and the challenges faced in harnessing this amount of flux and heat load in the beam. Furthermore, the distinctiveness of the world's first six-ram Hall-type large-volume press, Aster-15, at a synchrotron facility is described for research with synchrotron X-rays. Additionally, detection schemes, experimental strategies and preliminary data acquired using energy-dispersive X-ray diffraction and radiography techniques are presented.

Instrumentation at P61B. (a) Photograph of the LVP Aster-15, the detection positioning system with two Ge-SSDs and the X-ray microscope. Note that the plungers for the hydraulic rams are placed on top of the press frame. (b) Cross-section schematic of the LVP with the five-movement stages underneath (in a pit). Each stage is labeled accordingly for its movement direction, C1 indicates the rotation stage. (c) Various detector arrangements at their limit positions. Note, one Ge-SSD can be at ≥3° as long as the other Ge-SSD is at a position of ≥5° in both horizontal orientations.

Farla et al. (2022) J. Synchrotron Rad. 29, 409
Farla et al. 2022.pdf
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R. Farla, S. Bhat, S. Sonntag, A. Chanyshev, S. Ma, T. Ishii, Z. Liu, A. Néri, N. Nishiyama, G. A. Faria, T. Wroblewski, H. Schulte-Schrepping, W. Drube, O. Seeck & T. Katsura, Extreme conditions research using the large-volume press at the P61B endstation, PETRA III, Journal of Synchrotron Radiation, 29, 409-423, 2022. doi.org/10.1107/S1600577522001047