Final Shuttle Flight Will Be Delayed at Least Until November for AMS Switchout

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A switch-out of the magnet for a much anticipated particle physics experiment on the International Space Station will force NASA to delay the final flight of the space shuttle until at least November, and change which orbiter and crew will fly the final space shuttle mission. The $2 billion

Alpha Magnetic Spectrometer

was scheduled to head to the ISS in July of this year, but recent thermal vacuum tests showed the superconducting magnet that was originally planned to power the experiment would have only worked 2-3 years. An ordinary magnet, which doesn't need to be super-cooled will last for a decade or more – and given the ISS has been given a longer life, it seems to be the best option. "I don't think it's correct to go there for three years where there is a chance to do physics for 18 years," said Dr. Samuel Ting, AMS Principal Investor, in

an article in the New York Times.

NASA officials said today they still are evaluating the exact day in November, as they must schedule the mission to fit around other resupply and crew flights to the ISS, with the Russian Progress and Soyuz vehicles.

The AMS is designed to search for various types of unusual matter by measuring cosmic rays, and will help researchers study the formation of the universe and search for evidence of dark matter and antimatter.

Changing the magnet means the AMS won't arrive at Kennedy Space Center before August and shuttle workers need time to get the payload ready to fly inside the shuttle's cargo bay. [caption id="attachment_63476" align="aligncenter" width="400" caption="Atlantis at the pad for the STS-132 mission. Credit: Alan Walters (awaltersphoto.com) for Universe Today"]

[/caption] The upcoming flight of the shuttle Atlantis (STS-132) remains on schedule for launch no earlier than May 14. But Endeavour was scheduled for the AMS flight in July, which will now move to no earlier than November. Discovery's STS-133 flight (bringing up the Leonardo MPLM as a permanent storage module) stays on the schedule for September 16. So while the schedule changes, numerical order is restored!

Another possible change to the shuttle schedule would be if the decision to fly what is called STS-335, the Launch On Need mission, a shuttle ready to go as a rescue ship for the last scheduled mission. Many shuttle supporters say since Atlantis would be ready to fly that it should fly. No decision has yet been made, however.

Even if the final flight or flights get delayed into 2011, funding is not a problem, as Congress anticipated possible delays and provided funds for shuttle operations into early next year.

Liquid helium would have been used cool the superconducting magnet's temperature to near absolute zero. But tests showed the helium would dissipate withing 2-3 years, leaving the seven-ton experiment useless. The ISS has been extended to at least 2020, and possibly as long as 2028.

Sources:

New York Times

, Orlando Sentinel

Nancy Atkinson

Nancy Atkinson

Nancy Atkinson is a space journalist and author with a passion for telling the stories of people involved in space exploration and astronomy. She is currently retired from daily writing, but worked at Universe Today for 20 years as a writer and editor. She also contributed articles to The Planetary Society, Ad Astra (National Space Society), New Scientist and many other online outlets.

Her 2019 book, "Eight Years to the Moon: The History of the Apollo Missions,” shares the untold stories of engineers and scientists who worked behind the scenes to make the Apollo program so successful, despite the daunting odds against it. Her first book “Incredible Stories From Space: A Behind-the-Scenes Look at the Missions Changing Our View of the Cosmos” (2016) tells the stories of 37 scientists and engineers that work on several current NASA robotic missions to explore the solar system and beyond.

Nancy is also a NASA/JPL Solar System Ambassador, and through this program, she has the opportunity to share her passion of space and astronomy with children and adults through presentations and programs. Nancy's personal website is nancyatkinson.com