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Laser Interferometer
Gravitational-Wave Observatory
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One of LIGO's test masses installed in its quad suspension system

The photo shows one of LIGO's test masses installed as the 4th element in a 4-element suspension system. "Test masses" are what LIGO scientists call the mirrors that reflect the laser beams along the lengths of the detector arms. The 40 kg test mass is suspended below the metal mass above by 4 silica glass fibers.

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About the Image
Date
January 1, 2014
Location
LIGO Lab
ID
ligo20150731j
Type
Photograph
Credit
Caltech/MIT/LIGO Lab
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The LIGO Laboratory is supported by the U.S. National Science Foundation award PHY-2309200 and
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