Qualification and test results of a 5 Watt commercial Stirling cryocooler

Abstract

We have successfully developed and qualified a 5-Watt Stirling cryocooler that is suitable for commercial applications in the high temperature superconductor (HTS) wireless communication systems. The cooldown time to 77 K is less than 5 minutes (with 4 Watts heat load and a thermal mass of 1465 Joules). The cooler can provide a refrigeration capacity of ~5 Watt at 70 K. The qualification and test results of this cooler are discussed. FIGURE 1. A photograph of the B5000E Cooler.