โ Scribed by G. Chen; L. Qiu; J. Zheng; P. Yan; Z. Gan; X. Bai; Z. Huang
No coin nor oath required. For personal study only.
This paper describes the basic structure of a two-stage pulse tube refrigerator. A novel phase shifter termed a double-orifice is introduced. The machine was driven by a valved compressor and the on-off timing was controlled by a computer and solenoids. The lowest temperature of 3.1 K at the cold end of the second stage was achieved. 0 1997 Elsevier Science Ltd.
๐ SIMILAR VOLUMES
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