McWhan Clamp Cell
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|Max Pressure (GPa)||Pressing Medium||Temperature Range (K)||Sample Volume (cm3)||Cylinder Material||Expected Neutron Transmission for Cylinder||Equipment Used In|
|2.5||Fluorinert FC75, 4:1 Methanol to Ethanol Mix||4 - 300||1||ZrO2||See Graph||Bottom Loading CCR,
|1.5||Fluorinert FC75, 4:1 Methanol to Ethanol Mix||4 - 300||1||Al2O3||See Graph||Bottom Loading CCR,
This cell is constructed to a design originated by D.B.McWhan having a maximum pressure of ~2.5GPa, (25kbar). The sample is contained in the bore of a compressively loaded Alumina (Al2O3) ceramic cylinder, which is axially pressurized between two opposing cylindrical Tungsten Carbide pistons. Hydrostatic homogeneity is ensured by immersing the sample in Fluorinert FC75, (C8F18), liquid or a 4:1 mixture of deuterated methanol and ethanol. Pressure is monitored through the change in lattice parameters of NaCl, which should be included with the sample.