Shaft Cryostat Based on a GM Cryocooler and Its Capabilities

A vertically loaded cryostat with a shaft diameter of 80 mm based on a GM SRDK415D cryocooler for operation in the temperature range of 4–300 K is described. This cryostat can operate both in vertical and horizontal positions, almost without losing the final temperature. The time-temperature curves of the sample chamber in the temperature range of 4–150 K in the vertical and horizontal positions of the cryostat are presented. The temperature is adjusted using the controller. Before the experiment, the 25-mbar pressure of heat exchange helium gas is set in the shaft. The cryostat is designed for operation at the NERA spectrometer of the IBR-2 reactor at the Laboratory of Neutron Physics of the Joint Institute for Nuclear Research.