Diacell® OmniDAC
Optical and X-ray Spectroscopy, Pmax = 100 GPa, Tmax = 800 K, WD = 12 mm, A = 50°
- Maximum pressures of up to above 100 GPa may be obtained with the Diacell® OmniDAC
- Fitted with type IIas ultra low fluorescence anvils, Diacell® OmniDAC is suitable for Raman spectroscopy
- The Diacell® OmniDAC has a numerical aperture of 0.42
- X-ray experiments are also possible, the cell has extended lateral sight holes allowing the observation of scatter at directions normal to the cell axis as well (16°of 2θ is accessible)
- An optional heater is available, enabling high pressure research up to above 800 K
- Gas membrane driven, the pressure can be changed whilst the DAC is mounted on the spectrometer or X-ray stage
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Description
The Diacell® OmniDAC was designed for both X-ray diffraction and optical studies taking advantage of the gas membrane drive mechanism. Extended lateral sight holes allow the observation of scatter at directions normal to the cell axis. The Diacell® OmniDAC can be equipped (as an option) with an internal ring heater enabling the heating of the sample to about 800 K.
The gas membrane drive requires, additionally, the Diacell® GM Controller unit containing valves, couplings, pressure measurement and digital display modules.
Applications
The Diacell® OmniDAC was designed for both X-ray diffraction and optical studies at room and high-temperatures.
Specifications
| Cell Material | AISI 440C |
| Anvil Support Plate | Tungsten Carbide |
| Pressure Mechanism | Gas Membrane |
| Maximum Pressure | >100 GPa |
| Temperature Range | 295 to 800 K |
| Top Angle | Conical 50º |
| Bottom Angle | Conical 50º |
| Lateral Access | 16° of 2θ is accessible |
| Heating | Internal ring heater (option) |
| Cooling | N/A |
| DAC Diameter | 51 mm |
| DAC Height | 35 mm |
| Working Distance to Sample | 12 mm |
| Numerical Aperture | 0.42 |
| DAC Weight | 330 g |
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
2007 – Haskel et al. – Instrument for x-ray magnetic circular dichroism measurements at high pressures
Spares, Accessories and Options
Our diamond anvil cells are aligned and mechanically tested before leaving our factory on their way to your laboratory.
They also come supplied with the required basic tooling, including gasket blanks, to use them. All is contained in the transportation casing to move around laboratories easily.
Below you can find some of the accessories and spares you might also consider. If you cannot find what you need, please do not hesitate to contact our team.
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Diamond Anvils 3.1 mm Diacell® design diamond anvils, fitted in steel rings for easy fitting in the OmniDAC Product code: [P00132], [M50006] |
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Anvil Support Plate Seat, 50 Degrees, Tungsten carbide Product code: [P00124] |
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Gas Membrane Gas membrane suitable for the Diacell® OmniDAC Product code: [A76020] |
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Diacell® Gearbox Gearbox for the Diacell® Omni-DAC. Mainly used as gasket pre-indentation tool Product code: [A54100] |
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Ring Heater Ring heater & type-K thermocouple Product code: [A55100] |
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Programmable Power Supply PS-03 – Keithley/Temperature Reader including Labview based programm. Product code: [A75060] |
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Clamps Kit for OmniDAC Clamps for cryogenic gas loading in the OmniDAC. To be used in conjunction with the Diacell® Cryoloader Product code: [A30060] |
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Gasket Blanks 10 mm/ 0.25 mm thick Stainless Steel gasket blanks Product code: [P00113] |
FAQs
What is the maximum pressure I can achieve with the OmniDAC and a given culet size?
| Culet size (µm) | 200 | 300 | 400 | 500 | 600 | 800 | 1000 |
| Pmax (GPa) (*) | 114 | 98 | 63 | 41 | 28 | 16 | 10 |
(*) The Pmax values are only indicative. The maximum pressure achievable with a DAC is influenced by many others experimental parameters, like the gasket characteristics (material, thickness and hole size) or the pressure transmitting medium.
Can I carry out cryogenic Argon loading with the OmniDAC?
Yes it is possible to use cryogenic loading with the OmniDAC.
Can one use the Diacell OmniDAC for high pressure gas loading?
Yes. This diamond anvil cell is designed to accommodate some clamping screws (supplied as standard with the cell) running through the cylinder and enabling the piston to be fixed mechanically after a high pressure gas loading. The exact details of the gas loading and loading mechanism need to be engineered and Almax easylab offers a loading mechanism kit for such application. Consult us.
What makes the OmniDAC unique?
The OmniDAC is a diamond anvil cell with unique supporting seats and diamond anvil dimensions, enabling both optical and substantial X-Ray diffraction measurements with a 52-degree aperture. It works with a reliable gas membrane system for in-situ pressure adjustments on a spectrometer, saving setup time. An optional internal heater sets it apart from competitors. Its high precision machining allows it to generate very high pressures in the Mbar range. When paired with the iGM gas controller, it utilizes Almax easyLab’s High Pressure Manager software for automated measurement and pressure control, a unique feature exclusive to Almax easyLab.
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