Diacell® CryoDAC-Mega (B-Grade)

Non-magnetic, FTIR, Pmax = 100 GPa, Tmin = 77 K, WD = 15 mm, A = 50°

Diacell® CryoDAC Series

  • Non-magnetic diamond anvil cell for experiments with limited magnetic background
  • Pressures up to above 100 GPa may be obtained with the Diacell® CryoDAC-Mega
  • Specially suited for optical work at cryogenic temperatures, but can also accommodate scattering work
  • Screw driven, the force is applied via two pairs of left hand/right hand bolts using Belleville springs for a symmetric and controlled load
  • The anvils are mounted mechanically by force fitting into rings, a considerable advantage over fixing the anvils with epoxy resins
  • This is a B-Grade item. -25% discount on the price list. Consult us for more details.

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1 in stock

1 in stock

SKU: A68002BGRADE

Specifications

Cell Material Beryllium Copper
Anvil Support Plate Tungsten Carbide
Pressure Mechanism Screw Drive
Maximum Pressure 100 GPa
Temperature Range 77 K
Top Angle 50° Conical
Bottom Angle 50° Conical
Lateral Access N/A
Heating N/A
Cooling Via Cryostat
DAC Length 63 mm
DAC Height 32 mm
Clamp Diameter 38 mm
Working Distance to Sample 15 mm
Numerical Aperture 0.42
DAC Weight 400 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

Brochure CryoDAC-Mega

Technical Drawing

Please contact us for further details on the engineering drawings.

Articles

2010 – Kunes et al. – Metal-insulator transition and nature of the gap in NiS2−xSex

2012 – Ebad-Allah et al. – Polaron physics and crossover transition in magnetite probed by pressure-dependent infrared spectroscopy

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.

Diamond Anvil
3.1 mm Diacell® design diamond anvils, fitted in BeCu rings for easy fitting in the CryoDAC-Mega
Product code: [P00132], [M50005]
Anvil Support Plate
Tungsten carbide seat with 50° opening angle
Product code: [P00124]
Belleville Washers
Conical spring washer used with the clamping screws
Product code: [P01134]
Cryostat Custom Clamps
Consult us to discuss your specific requirements with our engineering team
Product code: [To be confirmed on application]
Clamps Kit for CryoDAC-Mega
Clamps for cryogenic gas loading. To be used in conjunction with the Diacell® Cryoloader
Product code: [A30100]

FAQs

What is the maximum pressure I can achieve with the CryoDAC-Mega 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.

Why do you have some pressure increase when cooling down?

In earlier versions of the CryoDAC Mega, clamping screws were made of stainless steel, which caused significant thermal contraction and pressure variation. This issue was partially resolved by switching to BeCu screws and later by modifying the clamping plates to fit Belleville springs, further reducing pressure variation with temperature changes.

If you have an older CryoDAC Mega and want to upgrade, you can order the kit [A68004], which includes two clamps, four clamping screws, and all the Belleville springs.

What makes the CryoDAC Mega unique?

The CryoDAC Mega is a low-temperature diamond anvil cell designed to allow observing and collecting light in the horizontal plane, which is crucial for setups with limited space in cryostats. Its unique pressure application mechanism uses two clamping plates and a combination of left-handed and right-handed screws to prevent torque and ensure the diamond remains aligned during pressurization. BeCu springs reduce pressure variation during cooling at cryogenic temperatures. Additionally, the cell’s BeCu construction, including all screws, ensures a very low magnetic background, making it ideal for magneto-optical applications like the KERR effect.

Is it possible to carry out electrical resistivity with the CryoDAC Mega? 

In principle, yes, but the CryoDAC Mega is not specifically designed for this purpose, so the setup might be awkward to implement. If it is a requirement, contact us.

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