Pulse tube refrigerator with shared inertance tube

Abstract This article has done the first experimental and numerical research on the shared inertance tube pulse tube refrigerator. The pulse tube hot ends of two cold heads are connected to a single inertance tube, which serves as a phase shifter for both cold heads. Numerical simulations and experiments were conducted to compare the phase distribution, cooling efficiency, and no-load temperatures of single-stage SPTC and shared inertance tube SPTC. The results indicate that the SPTC with a shared inertance tube exhibits enhanced phase-shifting capacity, enabling the achievement of lower cooling temperatures and higher cooling efficiencies. No-load temperature of 48.5K is reached in the preliminary experiment.