AdV-COM (AdV commissioning (1st part) )mwas - 20:00 Wednesday 29 August 2018 (42577)
Print this report1.5Hz oscillation in SDB1 TY controlFigure 1, There is a large oscillation in SDB1 TY control. It is also there COMMp TY signal, as both are looking at essentially the same beam. It is not clear to me which loop is the issue (or if something else is the cause). It would be good to try lowering separately the gain of the SDB1 TY and COMMp TY loop to investigate the source of the alignment oscillation. This oscillation could be making scattered light bumps worse.
