| 摘要 |
A pulse tube cryocooler (90) is disclosed having a second cryocooler section (94b) with a single pulse tube stage (35c), and having a first cryocooler section (94a) with a pair of pulse tube stages (35a, 35b). A first pressure oscillator (98a) is associated with the first cryocooler section (94a), while a second pressure oscillator (98b) is associated with the second cryocooler section (94b). The first cryocooler section (94a) and the second cryocooler section (94b) are fluidly isolated from each other. Therefore, the charge pressure, the pressure amplitude, oscillation frequency, and working gas in each of the first cryocooler section (94a) and the second cryocooler section (94b) may be independently selected/established.
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