DiacellĀ® CryoDAC-Nitro
Optical spectroscopy, Pmax = 50 GPa, Tmin = 77 K, WD = 11 mm, A = 52Ā°
DiacellĀ® CryoDAC Series
- Small diameter DAC particularly suited for mounting in liquid nitrogen cryostats where the radial space is reduced
- The DiacellĀ® CryoDAC-Nitro can also fit many other cryostats of bath, top-loading or close-cycle types. Custom made interface block are designed upon request.
- Gas membrane driven DAC, allowing the pressure change whilst the sample is at low temperatures
- Maximum pressures of up to above 50 GPa may be obtained with the DiacellĀ® CryoDAC-Nitro
Description
The DiacellĀ® CryoDAC-Nitro was designed to fit into many other cryostats of bath, top-loading, and closed-cycle types. It is supplied complete with a customised chrome-plated copper mounting block. The gas membrane mechanism drives the cell and may be pressurised by any permanent gas. For low temperature use, however, helium is recommended. As the temperature is lowered from room temperature, helium gas contracts rapidly but may still be used to drive a membrane.Ā The GM Controller is fitted with a relief valve to protect against possible loss of coolant. The CryoDAC-Nitro is especially suitable for use with liquid nitrogen cryostats.
One of the problems with cryogenic use of DACs is that the diamond anvils fall off quite easily if they are fixed in with epoxy resins and other glues. Therefore Almax easyLab uses a design unique to Diacell. The diamonds are supplied in force-fitted metal rings that are fixed mechanically to the tungsten carbide supporting plates, making the assembly robust at low temperature.
This cell is 29 mm from front to back (excluding the inlet tubes). The body is 34 mm diameter, and the membrane retaining ring 38 mm diameter. The DiacellĀ® CryoDAC-Nitro membrane is driven with use of the DiacellĀ® GM Controller which contains also a silicon-based pressure sensor and a digital pressure display.Ā Everything needed (valves, lines and couplings) is supplied with the unit, with the exception of the gas cylinder and its regulator head (for helium use a high-pressure reduction head is recommended).
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 DiacellĀ® CryoDAC-Nitro is particularly suitable for optical measurements within liquid nitrogen cryostats.
Specifications
Cell Material | High Strength Beryllium Copper Alloy |
Anvil Support Plate | Beryllium Copper Alloy |
Pressure Mechanism | Gas Membrane |
Maximum Pressure | 50 GPa |
Temperature Range | 77 K |
Top Angle | Conical 52Āŗ |
Bottom Angle | Conical 52Āŗ |
Lateral Access | 12Āŗ of 2 theta is accessible |
Heating | N/A |
Cooling | Via Cryostat |
DAC Diameter | 38 mm |
DAC Height | 29 mm |
Working Distance to Sample | 11 mm |
Numerical Aperture | 0.44 |
DAC Weight | 200 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.
FAQs
What is the maximum pressure I can achieve with the CryoDAC-Nitro and a given culet size?
Culet size (Āµm) | 200 | 300 | 400 | 500 | 600 | 800 | 1000 |
Pmax (GPa) (*) | N/A | 48 | 31 | 20 | 14 | 8 | 5 |
(*) 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 CryoDAC-Nitro for high pressure gas loading?
No, or at least not very easily as this is due to the absence of clamping screws in this diamond anvil cell. An alternative solution is the Diacell OmniDAC-LT.
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