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Diacell® LeverDAC-Mega

FTIR/Raman Spectroscopy, Mössbauer, Pmax = 100 GPa, Tmax = 800 K, WD = 15 mm,  A = 52°

Diacell® LeverDAC Series

  • Based on a leverage mechanism designed to bring the diamond anvils together, the LeverDAC-Mega is capable of achieving megabar pressures
  • The mechanical stability essential for generating pressures > 100 GPa is ensured by use of a piston which is long compared with its diameter
  • DAC can be disconnected from the lever arm and used independently on different measuring devices that have space limitations
  • Optional internal resistive heater enables the operation of the LeverDAC-Mega to temperatures of order of 800 K
  • The cell is specially suited for any ultra-high pressure (> 100 GPa) optical studies. It has a numerical aperture of 0.44

SKU: A67000

For more info, quotation or call: Contact us


The Diacell® LeverDAC-Mega is for work to the highest pressures diamond can withstand.  Carefully selected diamonds mounted on high-quality tungsten carbide support plates are set within a piston-cylinder assembly manufactured to very high specification. The mechanical stability essential for generating megabar (> 100 GPa) pressures is ensured by use of a piston which is long compared with its diameter.

The lower anvil plate is provided with lateral adjustments to permit the faces of the two anvil working faces to be brought into coincidence.  The upper anvil is mounted upon a hemisphere lapped into the cup-end of the piston. Three screws allow the tilt of the hemisphere to be altered to bring the anvil faces exactly into parallelism with each other.

All adjustments necessary for alignment may be made under a standard metallurgical microscope.  The diamond anvils may be accessed by four 8 mm diameter lateral holes through which electrical and other lead-ins may be fed. The cell is shipped aligned and ready for use.

Pressure is generated by compression of a stack of very hard disc springs which, in turn, operate a lever and plate, the latter bearing directly upon the rear of the anvil piston.  Two 6 mm diameter holes are provided in the base for mounting: other fixing arrangements may be specified when ordering.

An optional slotted seat, fitted on the the cylinder side is available upon request. The LeverDAC-Mega with a slit in the cylinder and the slotted seat allows the user to collect data using a larger opening angle (90 degrees).


Provision is made for fixing the lower presser plate to the central cylinder with four bolts. Once pressure has been applied to the sample, these bolts may be tightened, the cell disassembled, and the central insert mounted in an experimental enclosure.  Several inserts may thus be used with one body, and the arrangement also facilitates cryogenic loading.


Cell Material AISI 440C
Anvil Support Plate Tungsten Carbide
Pressure Mechanism Lever Arm Drive
Maximum Pressure >100 GPa
Temperature Range 295 to 800 K
Top Angle Conical 52º
Bottom Angle Conical 52º
Lateral Access N/A
Heating Internal ring heater (option)
Cooling Cold Air or Evaporated Liquid Nitrogen
Lever Arm Length / Width 181 mm / 87 mm
DAC Height 51 mm
Working Distance to Sample 13 mm
Numerical Aperture 0.44
DAC Weight TBC

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 LeverDAC-Mega

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.

Diamond Anvils
2.5 mm Diacell® design diamond anvils
Product code: [P00131]
Steel Anvil Rings
Anvil ring for the 2.5 mm diamond anvils
Product code: [M50004]
Anvil Support Plate
52 degree, Tungsten carbide seat
Product code: [P00128]
Slotted Seat on the Cylinder Side – Option 
40 degree with Slot 90 degree, Tungsten carbide seat
Product code: [P01299]
Ring Heater
Ring heater & type-K thermocouple
Product code: [A55100]
Programmable Power Supply
PS-03 – Keithley/Temperature Reader including Labview based programm
Product code: [A75060]
Gasket Blanks
5.00 mm/ 0.25 mm thick Stainless Steel gasket blanks
Product code: [P00110]


What is the maximum pressure I can achieve with the LeverDAC-Mega and a given culet size?

Culet size (µm) 200 300 400 500 600 800 1000
Pmax (GPa) (*) 142 124 79 51 35 20 13

(*) 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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