Spacewalkers continue repair of cosmic ray detector – msnNOW

In a advanced little bit of orbital surgical treatment, two spacewalking astronauts decrease into a $2 billion cosmic ray detector Friday, venting away existence-sustaining carbon dioxide coolant and then snipping eight coolant lines the scale of soda straws to put collectively the high-tech “patient” for a coolant pump transplant.

It modified into once the second of four planned spacewalks to repair the Alpha Magnetic Spectrometer, extending its existence thru the stay of the home space program so the particle physics instrument can continue its learn for clues concerning the character of enigmatic dark topic, dark energy and the antimatter thought to had been cooked up within the extensive bang.

Floating within the Quest airlock compartment, Italian astronaut Luca Parmitano and NASA crewmate Drew Morgan switched their spacesuits to battery energy at 7: 02 a.m. EST to formally kick off the 365 days’s 10th spacewalk, the 223rd since space assembly started in 1998.

The 7.5-ton AMS, mounted on the authorized facet of the space’s energy truss, modified into once now now not designed to be serviced by spacewalking astronauts, and fixing its failing cooling machine is believed of essentially the most nerve-racking orbital repair work since shuttle astronauts closing serviced the Hubble Space telescope.

All over an preliminary day outing closing Friday, Parmitano and Morgan removed a particles shield from the AMS, installed handrails, decrease zip ties preserving cables and coolant lines in space and pulled support insulation, getting smartly earlier than time desk and accomplishing a whole lot of tasks initially planned for the second excursion.

Friday’s revised spacewalk modified into once fervent in prepping energy and files cables vital by a singular coolant pump module, inserting in a mounting bracket to serve the unique pump bundle in space, reducing a 6-millimeter-huge line to vent carbon dioxide coolant overboard and reducing eight more even smaller lines that lift CO2 thru the instrument.

The vent line required two cuts to utterly depressurize the AMS’ thermal management machine, within the approach permanently disabling the instrument as planned until the unique pump module and carbon dioxide reservoir will also be linked.

Anchored to the stay of the home space’s robotic arm, Parmitano, assisted by Morgan, then frail custom instruments to diminish the eight lines frail to serve coolant thru the AMS, comparatively labeling every individual to assemble sure the magnificent lines are spliced into the replace coolant pump module throughout a 3rd spacewalk December 2.

With their Friday work entire, the astronauts made their way support to the Quest airlock, ending the six-hour, 33-minute excursion at 1: 35 p.m.

Assuming there are no main complications inserting within the unique pump module throughout their next day outing, Parmitano and Morgan will gather a fourth and closing spacewalk to terminate out the overhaul and address any agree to-up work that could maybe be vital after the coolant machine is re-pressurized and checks are applied to test its performance.

The Alpha Magnetic Spectrometer modified into once designed to detect high-energy cosmic rays in lengthy-timeframe examine to learn what took space to the antimatter that presumably modified into once created along with long-established topic on the birth of the cosmos. It also is making an strive to search out clues concerning the character of unseen dark topic and the equally mysterious dark energy that is speeding up the growth of the universe.

Launched to the space in 2011 aboard the next-to-closing home shuttle mission, the AMS modified into once designed to operate for three years. But the instrument managed an extra 5 years earlier than being hobbled by coolant pump failures, and NASA opted to strive the spacewalk repair job to lengthen its existence.

“It be now now not most efficient replacing the pumps, or now now not it’s replacing the accumulator, or now now not it’s replacing the warmth exchangers, heaters, valves, that entire pump bundle,” mentioned Ken Bollweg, the AMS mission manager on the Johnson Space Center in Houston. “It be an whole unique bundle that’s designed to lengthen the existence until the stay of the home space.”