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LIGO Single Stage HAM

Gravity wave observatory isolation platform


In partnership with National Science Foundation
In partnership with National Science Foundation

The LIGO Scientific Collaboration builds some of the most sensitive measurement equipment in the world. The scientists at LIGO came to HPD to help remove seismic vibrations as a noise source from their experiment. Through close collaboration and three generations, HPD first demonstrated that the vibration isolation needed might be attainable with the selected technology.

The second version of the platform provided two nested six-degree-of-freedom vibration isolation platforms. This nested structure turned out to be overly ambitious so the third iteration, which was then copied for the two sites, was a six-degree-of-freedom combination of active and passive vibration isolation. This platform is known as the Horizontal Access Module (HAM).

The LIGO Scientific Collaboration was awarded the Nobel Prize in Physics for the discovery of gravitational waves and has since then measured multiple gravitational wave events, such as the merging of two black holes and a neutron star being swallowed by a black hole.

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