Experimental study on the low temperature regenerator packed with rectification meshes

The low temperature regenerator with rectification meshes was designed to improve the cooling performance of a 10 K G-M refrigerator. The rectification meshes were packed not only at the two ends, but also in two additional positions inside the regenerator. By improving the helium gas distribution inside the regenerator at low temperatures, the cooling performance of the G-M refrigerator was obviously improved. The improvement was influenced by the positions and quantity of the rectification meshes inside the regenerator. The other factors influencing the performance of G-M refrigerator, including the charge pressure and input power, were also tested and their optimum values are given in this paper.