K. Venkateswara

In response to the problems reported in 16391, I centered the beam-balance in BRS within the nominal range of the angular readout. To do so, I physically moved a small mass on the balance using the bellows mounted on the front face of the vacuum can. After a few tries I was able to center it to within a ~1/3 of the full range. The balance was then damped to low amplitudes and I repositioned the damper.

BRS is now functioning correctly. The first attached plot shows the tilt-subtraction at work. The second shows the coherence between various sensors. The low coherence between the tilt-subtracted super-sensor and BRS RY shows the subtraction is working reasonably well.