抄録
An improved double-compressor pulse tube refrigerator in which one compressor is for power supply and another compressor with buffer is for phase shifter is introduced. The advantage is that the DC gas flow is easily controlled by a second orifice or perfectly cut. A numerical simulation is performed to a double-compressor 4 K pulse tube refrigerator. The numerical calculated results are useful for the experimental. This method is also a good method to confirm the DC gas flow effect at 4 K pulse tube refrigerator.
