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Diacell® CryoDAC-Mega

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

SKU: A68002

For more info, quotation or call: Contact us


The Diacell® CryoDAC-Mega is a very versatile diamond anvil cell. Made from BeCu alloy, it is suitable for both optical and X-ray diffraction studies at cryogenic temperatures. Due to its high numerical aperture it is well suited to use with FTIR and other types of spectrometer, whilst X-ray diffraction measurements can be made up to 2θ values of 25º.

The diamond anvils are mounted within force-fitted BeCu rings, and mechanically fixed to their tungsten carbide support plates, thereby avoiding use of epoxy resins which have a limited lifetime at low temperature.

The Diacell® CryoDAC-Mega is held within two CuBe blocks. One of these is fixed to the cryostat cold station and also accepts the cylindrical DAC. The second block fits over the DAC and is used to apply load to the cell by means of four bolts. The diameter of the complete assembly is 38 mm.

Due to its high numerical aperture it is well suited to use with FTIR and other types of spectrometer, whilst X-ray diffraction measurements can be made up to 2θ values of 25º.


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.


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.


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]



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.


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