Diacell®Bragg-LT(G) Plus
X-ray Spectroscopy, Pmax = 100 GPa, Tmin = 4 K, WD = 14 mm, A = 85°
Diacell® Bragg Series
- The Diacell® Bragg-LT(G) Plus uses conical Boehler-Almax anvils, making this cell the true benchmark for high pressure X-ray studies at low temperatures
- The large angle apertures enable diffraction work with high transmission factor and very low background
- The Diacell® Bragg-LT(G) Plus also lends itself to optical experiments at high pressures
- Being a gas membrane driven means that pressure within the cell can be changed whilst the sample is mounted on the X-ray stage, saving considerable time
- Maximum pressures of up to above 100 GPa may be obtained with the Diacell® Bragg-LT(G) Plus
- The DAC can be supplied already integrated to a cryostat
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Description
The Bragg-LT(G) Plus is the cryogenic version of the Bragg-(G) Plus cell.
The Diacell® Bragg-LT(G) Plus is suitable for use in several commercial cryostats. Because the cell is gas membrane-driven its use is limited to not less than 6 K due to the gas-to-solid phase change in He at 5.2 K when at 200 bar gas pressure.
Another variation of the Bragg-LT(G) Plus is the Diacell® Bragg-LT(G) Plus – Large Sight Holes. The lateral sight holes of this Diamond Anvil Cell have been widened in an elliptical shape to enable up to 25° and 130° degrees of respectively vertical and horizontal apertures.
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
For X-Ray diffraction and related work at low temperatures. The DAC is supplied with a 3.1mm mounting pin that is compatible with most commercially available goniometer heads, such as those from Huber.
Specifications
| Cell Material | Beryllium Copper Alloy |
| Anvil Support Plate | Tungsten Carbide |
| Diamond Anvil Design | Boehler-Almax 3.30 mm – 85° |
| Pressure Mechanism | Gas Membrane |
| Maximum Pressure | > 100 GPa |
| Temperature Range | < 10 K |
| Top Angle | X-Ray: conical 85º |
| Bottom Angle | X-Ray: conical 85º |
| Lateral Access | 24° of 2θ is accessible |
| Heating | N/A |
| Cooling | In Cryostat |
| DAC Diameter | 53 mm |
| DAC Height | 32 mm |
| Working Distance to Sample | 14 mm |
| Numerical Aperture | 0.67 |
| Interfacing Solution | Via mounting pin (included) |
| DAC Weight | 300 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.
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 3.30 mm – 85° Boehler–Almax design diamond anvil for Bragg-LT(G) Plus diamond anvil cell Product code: [P00539] |
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Anvil Support Plate Tungsten carbide seat (KXF), with 85° conical aperture for Bragg-LT(G) Plus diamond anvil cell Product code: [P00826] |
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Gearbox Gearbox assembly to drive the 4 clamping screws simultaneously Product code: [A51100] |
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Clamp Kit for Cryoloader Kit for cryogenic gas loading using the Diacell® Cryoloader Product code: [A30200] |
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Gas membrane Gas membrane used in the Diacell Bragg(G) series Product code: [A76010] |
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Conversion kit Upgrade kit from Bragg-LT(G) to Bragg-LT(G) Plus Product code: [A52002] |
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Gasket Blanks 10 mm diameter and 0.25 mm thick, BeCu gasket blanks Product code: [P01314] |
FAQs
What is the maximum pressure I can achieve with the Bragg-LT(G) Plus and a given culet size?
| Culet size (µm) | 200 | 300 | 400 | 500 | 600 | 800 | 1000 |
| Bragg-LT(G) Plus 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.
Why can’t I vary the pressure at low temperatures with large culet anvils?
Using large culet anvils might increase pressure at room temperature but often fails at cryogenic temperatures due to friction and restricted piston movement, which prevents meaningful pressure changes. Moreover, at low temperatures, gasket materials like copper become harder and less ductile, inhibiting pressure variation. We recommend using diamond anvils with smaller culet sizes, such as 1.00 or 1.20 mm, for more consistent results at low temperatures. Additionally, frequently varying the pressure, especially in cold conditions, is risky and can damage the anvils, as seen when alternating pressure between 140 bar and 80 bar without significant changes.
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