Diacell® OmniDAC-LT
Optical and X-ray Spectroscopy, Pmax = 100 GPa, Tmin = 4 K, WD = 12 mm, A = 50°
- The Diacell® OmniDAC-LT is made of high - strength beryllium copper alloy and is the cryogenic version of the OmniDAC
- Maximum pressures of up to above 100 GPa may be obtained with the Diacell® OmniDAC-LT
- Having a numerical aperture of 0.42 the cell is useful for X-ray and optical measurements at low temperatures
- Being gas membrane driven means that the pressures within the OmniDAC-LT can be changed whilst the sample is mounted in the spectrometer or X-ray stage
- The diamond anvil cell can be integrated in a variety of cryostats and may be supplied as a turn-key high pressure and low temperature system (Diacell® CCS-DAC System or Diacell® PT- DAC System)
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Description
This is the cryogenic version of the Diacell® OmniDAC and differs from it only in being made of BeCu alloy.
The Diacell® OmniDAC-LT 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 gas membrane drive requires, additionally, the Diacell® GM Controller containing valves, couplings, pressure measurement and digital display modules.
Note: If the diamond anvil cell is to be used a low temperature, a low temperature relief valve will need to be fitted on the gas line. This low temperature relief is available from Almax easyLab alongside our GM or iGM controllers option.
Applications
The Diacell® OmniDAC-LT was designed for both X-ray diffraction and optical studies.
Specifications
| Cell Material | High Strength Beryllium Copper Alloy |
| Anvil Support Plate | Tungsten Carbide |
| Pressure Mechanism | Gas Membrane |
| Maximum Pressure | >100 GPa |
| Temperature Range | < 10 K |
| Top Angle | Conical 50º |
| Bottom Angle | Conical 50º |
| Lateral Access | 16° of 2θ is accessible |
| Heating | N/A |
| Cooling | Via Cryostat |
| DAC Diameter | 51 mm |
| DAC Height | 35 mm |
| Working Distance to Sample | 12 mm |
| Numerical Aperture | 0.42 |
| Interfacing Solution | TBC |
| DAC Weight | 350 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
2017 – VanGennep et al. – Pressure-induced superconductivity in the giant Rashba system BiTeI
2024 – Lim et al. – Effect of low T compression on superconductivity and crystal structure in strontium metal
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 BeCu rings for easy fitting in the OmniDAC -LT Product code: [P00132], [M50005] |
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Anvil Support Plate Seat, 50 Degrees WC Non-Magnetic (tungsten carbide with 6% nickel) Product code: [P00125] |
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Gas Membrane Gas membrane suitable for the Diacell® OmniDAC-LT Product code: [A76020] |
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Diacell® Gearbox Gearbox for the Diacell® Omni-DAC-LT. Mainly used as gasket pre-indentation tool Product code: [A54100] |
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Clamps Kit OmniDAC-LT Clamps kit for the OmniDAC-LT, to be used in conjunction with the Diacell® Cryoloader Product code: [A30060] |
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OmniDAC-LT, GM Decompression Kit For a better pressure control in particular at low temperature and when releasing the pressure of the diamond anvil cell Product code: [A53010] |
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Gas loading kit Product code: [A96500] |
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Cryostat Interfacing Holder Customised chrome-plated copper mounting block for cryostat Product code: [to be confirmed upon application] |
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Gasket Blanks 10 mm/ 0.25 mm thick BeCu gasket blanks Product code: [P01314] |
FAQs
What is the maximum pressure I can achieve with the OmniDAC-LT 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 one use the OmniDAC-LT 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.
Can I carry out cryogenic Argon loading with the OmniDAC-LT?
Yes it is possible to use cryogenic loading with the OmniDAC- LT.
Which type of Helium gas should I be using in the membrane at low temperature?
99.999% – 5N
1 review for Diacell® OmniDAC-LT
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Isaiah Lim –
This product is excellent for conducting high-pressure and low-temperature measurements using diamond anvils. It boasts a well-designed and precisely machined construction. I mostly use it for electrical resistivity measurements under high pressure, but it’s versatile enough for magnetic measurements as well, thanks to the high-quality BeCu materials used. The chromium coating on the piston side, combined with the smoothly fitting cylinder, minimizes wobbling, ensuring precise high-pressure conditions. I highly recommend this product for high-pressure DAC transport and X-ray spectroscopic measurements.