LIGO's vibration isolation system

Re:LIGO's vibration isolation system by dnautics on Thursday February 11, 2016 @08:57PM (#11084814)

what about molecular motions of the mirrors themselves?

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Re:LIGO's vibration isolation system by lololomg on Thursday February 11, 2016 @09:06PM (#11084841)

That averages out over the timespan involved in gravitational wave detection. The waves detected by LIGO are on the order of 100 Hz while molecular vibrations are many orders of magnitude higher.

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Re:LIGO's vibration isolation system by JabavuAdams on Friday February 12, 2016 @05:35AM (#11086352)

Ah! This is a key point! Thanks.

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Re:LIGO's vibration isolation system by jakeogh on Friday February 12, 2016 @12:00AM (#11085418)

I understand that's why https://en.wikipedia.org/wiki/KAGRA is cryogenic. Kip Thorne mentioned it during the Q&A@ https://www.youtube.com/watch?v=aEPIwEJmZyE

Are their suspected GW sources in the thermal ~(7um/42MHz) range?

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Re:LIGO's vibration isolation system by jakeogh on Saturday February 13, 2016 @03:03AM (#11093190)

Found more info on thermal mirror effects, see around 12m @ https://www.youtube.com/watch?v=RGqZZthc_l4

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Re:LIGO's vibration isolation system by dnautics on Monday February 15, 2016 @04:47AM (#11102437)

hey you can set timestamps on youtube links like so:

https://www.youtube.com/watch?v=RGqZZthc_l4&t=12m

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