High Pressure / High Temperature Large Volume Press
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The Large Volume Press (LVP) facilities hosts the following devices:
- 1000 ton multi-function press at 13-ID-D,
- 250 ton multi-function press at 13-BM-D,
- 230 ton Paris-Edinburgh press at 16-BM-B of HPCAT.
The 1000 ton LVP Two high pressure modules are used in this LVP interchangeably: (1) T-25 — a split-cylinder type Kawai apparatus that uses 25.4 mm second-stage WC anvils, with compression along the  axis of the Kawai cell. Maximum attainable pressure and temperature are 28 GPa and 3000 K, respectively. Standard cell assemblies: 8/3, 10/5, 14/8. (2) DDIA-30 — a large deformation DIA which can be operated in two modes. In deformation mode, one may use 6-6MA cells with desired anvil truncation to conduct deformation experiments, with strain and stresses controlled by the differential rams. In double-stage hydrostatic mode, one can use second-stage anvils made of sintered diamond anvils (14 mm cubes) for ultra-high pressure experiments. Maximum pressure and temperature are currently 40 GPa and 2500 K, respectively. Acoustic interferometry is available for both modes. Acoustic emission experiments are possible, with special arrangements.
The 250 ton LVP Several devices are available based on the “Swiss-Army Knife” approach. (1) a DIA apparatus, ideal for viscosity and density measurements based on x-ray absorption. (2) a D-DIA for controlled deformation experiments. (3) a high-pressure tomography apparatus for 3D sample microstructural imaging. (4) a T-10, a smaller version of T-25. Both white and monochromatic radiation can be used. Acoustic interferometry is available for most of the devices. Acoustic emission experiments require special arrangements.
The 230 ton Paris-Edinburgh apparatus is currently located at 16-BM-B, in collaboration with HPCAT. This device is ideal for structural studies on amourphous materials using multi-angle enegy-dispersive diffraction. Acoustic interferometry can be combined with diffraction. Beam time application for this technique is through the HPCAT.
For additional information concerning this technique or submitting a proposal to use this technique at GSECARS, please contact :
1000 ton Multi-anvil Press, 13 IDD
Dr. Zhicheng Jing, Dr. Tony Yu, Dr. Yanbin Wang, GSECARS beamline scientists, LVP