✦ LIBER ✦

Theoretical and experimental studies of a double-inlet reversible pulse tube refrigerator

✍ Scribed by C. Wang; P.Y. Wu; Z.Q. Chen

Publisher: Elsevier Science
Year: 1993
Tongue: English
Weight: 545 KB
Volume: 33
Category: Article
ISSN: 0011-2275
DOI: 10.1016/0011-2275(93)90125-8

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✦ Synopsis

A mechanical support system is described for a space-borne 3He refrigerator that relies on Kevlar 29 braided cords to achieve thermal isolation at temperatures ranging from 0.3 to 40 K. Measurements of the Young's modulus, tensile strength, creep and thermal conductivity of Kevlar cords at room and liquid nitrogen temperatures are discussed and used to predict the performance of the system. Results of vibration tests of the mechanical support are compared with these predictions. The system safely supports a 350 g mass against 30 G sinusoidal accelerations at frequencies of 20 Hz to 2 kHz. The calculated heat load between 2 and 0.3 K is 0.7/~W.

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