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Astronauts Wrap Up Third Spacewalk for Cosmic Particle Detector Repairs

3 Dec 2019, 01:01 UTC
Astronauts Wrap Up Third Spacewalk for Cosmic Particle Detector Repairs
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Astronauts Luca Parmitano and Andrew Morgan are pictured during a spacewalk to continue upgrading the station’s cosmic particle detector, the Alpha Magnetic Spectrometer. (Credit: NASA)

HOUSTON (NASA PR) — Expedition 61 Commander Luca Parmitano of ESA (European Space Agency) and NASA Flight Engineer Andrew Morgan concluded their spacewalk at 12:33 p.m. EST. During the six hour and two minute spacewalk, the two astronauts successfully installed a new cooling system for the Alpha Magnetic Spectrometer (AMS).

The crew completed the primary task to install the upgraded cooling system, called the upgraded tracker thermal pump system (UTTPS), completed the power and data cable connection for the system, and connected all eight cooling lines from the AMS to the new system. The intricate connection work required making a clean cut for each existing stainless steel tube connected to the AMS then connecting it to the new system through a process of metalworking known as swaging.

The astronauts also completed an additional task to install an insulating blanket on the nadir side of the AMS to replace the heat shield and blanket they removed during the first spacewalk to begin the repair work. The flight control team on Earth initiated power-up of the system ...

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