(Warner, Drigger, Gray)

Summary:  Beams were not aligned onto PDs for PRM, so we had to touch alignment of PRM, RM1, & RM2

After getting a hand-off from Jim, went through Initial Alignment, just so I could see what he saw.  I made notes as I went:

• Align Arms Using GREEN:
  • First thing:  Took ISC_LOCK from PAUSE -> EXEC.  And also have in DOWN (request)/READY (state)
  • Took ALS's & ALIGN IFO to AUTO (they were Managed)
  • Hard to tell when "control signals converge"....what are these signals & what should they converge to?
  • Went ahead and OFFLOADED GREEN WFS
  • Beatnote was around 3.5dBm....so I tweaked PR3 to get it to 4.6dBm
  • note:  during alignment ALSX would drop out every few minutes
• Input Align
  • Xarm would not lock after 5min.  So did Jenne trick of increasing LSC-XARM_GAIN from 0.05 to 0.15 & locked within a minute & Offloaded while at this gain (is that OK?)
• PRM Align
  • During REFL_WFS_CENTERING_PRX, got:  "REFL WFS DC Centering Railed" briefly & then nothing...stuck here.  Then Guardian would go DOWN & try again.

This is where I called in Jenne for a rescue.  

So from PRM Align, we looked through ASC land and found big inputs on the DC1 & DC2 PDs.  

Then took ISC ALIGN to DOWN, and then only to PRX_LOCKED.  

While here we ultimately moved some optics around to help us get better.  I watched the DC pds and Jenne did the same and also looked at some QPD sum values, while I tweaked on the PRM (mainly).  I also tweaked on the RM1 & RM2 mirrors a little to get the DC1/2 values down to decent values (from 0.9 down below 0.2).  Jenne could clearly see the beam off the QPDs and walked me into a decent spot & I tweaked mirrors to minimize inputs on the DC pds.

Once we liked what we had, Jenne engaged the PRC1 p/y loops by hand, and this improved all the signals we were looking at (note:  she turned OFF the intergrators first [FM2's]...once loops INPUTs were ON, she turned on FM2's again).  At this point everything looked good.  We then went to PRM_ALIGN (which didn't do much, since Jenne did it all by hand).  I then waited and OFFLOADED PRM Alignment.

I also went to DOWN and back to PRM ALIGN to repeat and everything looked good.  

Now continuing with Initial Alignment!