DiacellĀ® ShearDAC
Raman Spectroscopy, Pmax = 50 GPa, T = 300 K , WD = 17.50 mm, A = 80Ā°,Ā Full 360Ā° rotation of the piston
DiacellĀ® LeverDAC Series
- The DiacellĀ® ShearDAC is equipped with internal gears that enable a full 360Ā° rotation of the piston anvil relative to the fixed cylinder anvil
- This cell is ideal for performing spectroscopic experiments with simultaneous shear and static high-pressure
- Maximum pressures of up to above 50 GPa can be achieved
- Smooth rotation is obtained by an extremely careful machining of the piston and cylinder
- Fitted with ultra low fluorescence anvils the DiacellĀ® SherDAC may be used for Raman spectroscopy
- The cell can also be fitted with Boehler-Almax design diamond anvils, for an enlarged observation top angle.
Description
The DiacellĀ® ShearDAC is a diamond anvil cell ideal for performing experiments with simultaneous shear and static high-pressure up to above 50 GPa.
The cell’s design is based on the megabar diamond anvil cell DiacellĀ® LeverDAC-Mega and allows for controlled shear. The additional gearing enables the rotation of the piston anvil relative to the fixed cylinder anvil. Using a set screw, the position and orientation of the cylinder can be fixed to prevent concurrent rotation with the piston. Extremely careful machining of the piston and cylinder allows for unhindered rotation.
It is possible to use a wide range of existing experimental techniques and pressure media with the DiacellĀ® ShearDAC. Preparation of the cell for experiments is very much similar to those of more conventional diamond anvil cells.
The DiacellĀ® ShearDAC was originally fabricated for J. Ciezak (US Army Research Lab) and validated on a sample of calcite at 0.5 GPa (5 kbar). Raman measurements show the onset of the phase transformation from calcite to aragonite at 10Ā° of rotation (c.f. Ciezak, J. and Jenkins, T., Rev. Sci. Instrum. 82, 073905 (2011)).
Specifications
ShearDAC [A22000] | ShearDACĀ Plus [A22100] | |
Cell Material | Maraging steel | Maraging steel |
Anvil Design | Diacell | Boehler-Almax |
Anvil Support Plate | Tungsten Carbide | Tungsten Carbide |
Pressure Mechanism | Lever Arm Drive | Lever Arm Drive |
Maximum Pressure | Ā 50 GPa | Ā 50 GPa |
Temperature Range | Room Temperature | Room Temperature |
Top Angle | 34Āŗ Conical | 80Āŗ Conical |
Bottom Angle | 9Āŗ Conical | 8.8Āŗ Conical |
Lateral Access | N/A | N/A |
Heating | N/A | N/A |
Cooling | N/A | N/A |
Lever Arm Length / Width | 165 mm/ 76 mm | 165 mm/ 76 mm |
DAC Diameter | 33 mm | 44.5 mm |
DAC Height | 89 mm | 70.5 mm |
Working Distance to Sample | 17.5 mm | 15 mm |
Numerical Aperture | 0.29 | 0.64 |
DAC Weight | TBC | TBC |
Maximum pressure is dependent upon the culet size of the anvils. Almax easyLab is committed to its policy of continuous improvement. Specifications may change without notice. easyLab and Diacell are registered trademarks of Almax easyLab.
Documents
We have compiled a series of technical documents (brochures, articles, technical drawings, …) which you might find useful to help you understand this product better.
Technical documentation
Technical Drawing
Please contact us for further details on the engineering drawings.
Articles
2011 ā Ciezak, J. and Jenkins, T.A. – Optical cell for in situ vibrational spectroscopic measurements at high pressures and shear
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