Wanted to make/consolidate a few notes regarding operations as of late & for this weekend

PRC Gain & PR3_REFL_WFS

The last few shifts/weeks we have been waivering on the PR3 (POP vs REFL) WFS steps.  As of this moment, we are bypassing BOTH of these steps in Guardian.  Kiwamu said that if we had higher PRC Gain, we could try for the POP WFS, but the PRC Gain (PR_GAIN_OUT16 on front StripTool) must be 30 or more....it has been hovering at 29, so we are skipping this step.  

Sheila tried to improve the PRC gain by tweaking on the PRC alignment over the last few weeks.  This sounds like a work in progress.  For the weekend, we will ignore these PR3 (POP/REFL) WFS steps.

Beam Diverters

Another step we have been skipping toward the end of the Guardian steps is the CLOSING BEAM DIVERTERS.  We want to keep the POP Beam Diverter open, but perhaps for better performance and consistency for PEM Injections, we have been closing the REFL & AS_AIR Beam Diverters Manually (i.e. Sitemap/LSC/Beam Diverters).  When you close the AS_AIR, it will give you a glitch in DARM, but it's not too scary.

POP90 & SRC1 pit/yaw Loop

There had been some issues with the SRC1 Loop.  Basically it would push the alignment such that the POPAIR_B_RF90 (on the front StripTool) trace would increase (a bad thing).  So, if you see this trace increase, you should:

• Go to the SRC1 Pit & Yaw Loops
• Zero their gains
• Then tweak on the SRM to bring the POPAIR_B_RF90 trace down. 
• Keep the SRC1 gains at zero.

Have not had issues with this for the (3) locks since Kiwamu left.  (Knock on wood.)