• A Three-Stage Stirling Pulse Tube Cryocooler Approaching 4 K 

      Cao, Q.; Qiu, Limin; Gan, Zhihua; Yu, Y. B.; Zhi, X. Q. (Georgia Institute of TechnologyICC Press, 2008-05)
      It is a great challenge for a Stirling Pulse tube cryocooler (PTC) to reach liquid-helium temperature, where there are promising applications such as superconducting digital electronics, midinfrared instrument, heterodyne ...