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To address the experimental restrictions of sample orientation and cryogenic temperatures in DC and pulsed magnetic fields, three different DACs have been designed (see table below). All are made entirely of BeCu and have optical ports and provisions for either miniature triaxial cable or shielded twisted pairs. The largest of the three DACs provides the highest pressures. DAC #2 was designed with its small diameter and thin wall to minimize eddy current heating of the sample prior to data acquisition in pulsed magnets. This particular cell is small enough to freely rotate within a 12 mm sphere and thus enables orientation dependent work to millikelvin temperatures and pulsed fields to 50 T and higher. Both cells #1 & #2 support a minimal load of 10 kN. DAC #3 is intended for microkelvin work and possibly heat capacity studies.
| Characteristics of Pressure Cells Available at NHMFL | |||||
| Pressure Cell |
Mass (g) |
Pressurized Volume (Dia.XHeight) (mm X mm) |
Radius Of Sphere Of Free Rotation (mm) |
Max Magnetic Field To Date (T) |
Max Pressure To Date GPa |
| DAC #1 | 22.3 | 0.6 X 0.09 | 20.3 mm | 20 T DC | 14.0 |
| DAC #2 | 4.0 | 0.5 X 0.08 | 12.0 | 50 T pulsed, 98% penetration |
4.0 |
| DAC #3 | 1.7 | 0.4 X 0.08 | 9.0 | --- | 2.2 |
| DAC #4 | 1.1 | 0.3 X 0.06 | 7.0 | --- | --- |
| Piston-Cylinder | 31 | 3.3 X 4.5 | --- | 20 T | 1.7 |
| Sapphire Ball | 61 | 1.0 X 0.3 | --- | --- | 7.8 |
Photo Caption: Diamond anvil cells are available for optical and transport
measurements in both pulsed and DC fields. The upper photo shows a
disassembled DAC #1. DAC numbers 1, 2, and 3 are shown assembled in the
lower picture.
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