Clamp Type High Pressure Apparatus Using Small Bridgman Anvil at Low Temperature

Abstract

High pressure apparatus at liquid helium temperature is built. It is a high pressure cell of clamp type using small Bridgman anvil (4 mm face) geometry. The pressure is applied to a sample using a standard hydraulic press and clamped by means of three bolts at room temperature, then the cell is cooled down to low temperature. The pressure is calibrated by means of the phase transition of Bi, Tl and Sn at room temperature, and pressure dependence of superconductive transition temperature of tin at low temperature which is measured by means of the electrical resistance and a.c. mutual inductance bridge.