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I attached a plot of the GG noise from the BSC vibration, calculated from real accelerometer data (from early this morning) and a generous estimate of the gravity coefficient (7.3e-9 (m/s^2)/m). It doesn't come close to the total noise curve, so unless another model says something very different, we might not have to worry about the BSC at all. |
In addition to the papers listed at [http://ilog.ligo-wa.caltech.edu:7285/advligo/Seismic_Isolation the AdvLIGO wiki], I found [http://www.iop.org/EJ/abstract/0264-9381/15/11/004/ this VIRGO paper], which contains a section "Effect of the apparatus infrastructure".
[http://www.ligo.caltech.edu/docs/P/P040032-00.pdf Rana's thesis]
[http://www.ligo.caltech.edu/docs/G/G040557-00.pdf Rana's presentation with scale diagram of BSC]
I attached a plot of the GG noise from the BSC vibration, calculated from real accelerometer data (from early this morning) and a generous estimate of the gravity coefficient (7.3e-9 (m/s^2)/m). It doesn't come close to the total noise curve, so unless another model says something very different, we might not have to worry about the BSC at all.