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NASA Telescope Aces Acoustic and Vibration Tests

By Rob Gutro, NASA | March 30, 2017

NASA engineers and technicians perform vibration testing on the James Webb Space Telescope. Image: NASA/Chris Gunn

At NASA’s Goddard Space Flight Center in Greenbelt, Md., the James Webb Space Telescope team completed the acoustic and vibration portions of environmental testing on the telescope. These tests are merely two of the many that spacecraft and instruments endure to ensure they are fit for spaceflight.

For the acoustic test, the telescope was wrapped in a clean tent, and engineers and technicians pushed it through a large pair of insulated steel doors nearly a foot thick into the Acoustic Test Chamber. In the chamber the telescope was exposed to the earsplitting noise and resulting vibration of launch. 

A new vibration test system also known as a shaker table, was built specifically for testing the Webb. The Webb was mounted on the shaker table and experienced the simulated forces the telescope will feel during the launch by vibrating it from 5 to 100 times per second. The test ensures a spacecraft like Webb can withstand the vibrations that occur as a result of the ride into space on a rocket.

This spring, after other environmental tests are completed, the Webb telescope will be shipped to NASA’s Johnson Space Center in Houston, Texas, for end-to-end optical testing in a vacuum at its extremely cold operating temperatures, before it goes to Northrop Grumman Aerospace Systems in Redondo Beach, Calif., for final assembly and testing prior to launch.

By performing these tests, scientists and engineers can ensure that the spacecraft and all of its instruments will endure the launch and maintain functionality when it is launched from French Guiana in 2018.

The James Webb Space Telescope is the scientific successor to NASA’s Hubble Space Telescope. It will be the most powerful space telescope ever built. It is being assembled in a Class 10,000 cleanroom at NASA’s Goddard Space Flight Center. Webb is an international project led by NASA with its partners, ESA (European Space Agency), and the Canadian Space Agency.

Source: NASA

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