Polytetrafluoroethylene (PTFE), which is susceptible to embrittlement by ionizing radiation, is used as a primary material in the Mobile Transporter's (MT) Trailing Umbilical System (TUS) cable on the International Space Station (ISS). The TUS cable provides power and data service between the ISS truss and the MT. The TUS cable is normally stowed in an uptake reel and is fed out to follow the MT as it moves along rails on the ISS truss structure. For reliable electrical and mechanical performance, TUS cable polymeric materials must be capable of >3.5% elongation without cracking or breaking. The MT TUS cable operating temperature on ISS is expected to range between -100 degree C and +130 degree C. The on-orbit functional life requirement for the MT TUS cable is 10 years.
Ionizing Radiation Effects on ISS ePTFE Jacketed Cable Assembly
2003
5 Seiten, 17 Quellen
Conference paper
English
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