BBSS Top Mass F1 Drift: The Anthology

Ibrahim 

This alog is a summary of all the BBSS drift data we have, and what observations informed which next steps. The embedded table below shows each "regime", which is a span of data collection after a mechanical adjustment. I have then linked pictures of each regime's available OSEM readouts. In the case of BOSEMs, we've only had clean readings with working electronics for regimes 8, 9, 10. We briefly had a broken sat-amp box for regime 5 so we do have some readings. Either way, I don't believe these show significant drift. At the end, I also have attached an overview of the two main adjustment types over the course of the time we've been dealing with this issue. First is blade tip adjustment and second is added weight (grams) distribution adjustment (which also has a graphic for each config). I will add Transfer Functions later (IFO is misbehaving on EVE shift and want to get something out!). They are located on X1 under: /ligo/svncommon/SusSVN/sus/trunk/BBSS/X1/BS/SAGM1/Results and are dated. With limited further ado:


 Overview: Blade Tip Height Changes: 



 Blade Tip Height Changes: 

Regime 1:

  

Regime 2:

 

Regime 3:

 

Regime 4:

 

Regime 5:

 

Regime 5 PUM BOSEMs (Broken Sat Amp):



Regime 6:

 

Regime 7:

 

 Added Weight Distribution Changes:

Regime 8:

 

Regime 9:

 

Regime 10:

 

 Regime 8, 9, 10 (Weight Changes) PUM BOSEMs: 



 Added Weight Distribution Config Graphic: 

In reply

 Added Weight Changes Zoomed Out:



 Blade Tip Height Changes and Initial Drift Zoomed Out:

Correction to BBSS Added Weight