Attached is a plot summarising the behaviour of the front end laser pump diodes.
The oscillation in the output power has been observed before and I'm not sure
what it is caused by.  I had thought that it might be due to an oscillation in
the PID loop controlling the pump diode temperature, however it's not visible
in the TEC signals (D[1-4]TEC).

We still have a reasonable amount of headroom for the pump diodes.  At the
moment the diode current is ~51.5 A.  The maximum is 65 A.

O1 days 83-87. No restarts reported for this time period.

Planning for Tuesday Maintenance:

• Dust monitor plumbing at EY - Jeff B
• EX lights - Richard
• ISI Front End change for smoother blend switching and T240 ring up issue. This will require the platforms to be brought down and restarted. - Hugh
• CDS at the end stations cabling
• LVEA Laser SAFE in the morning

Activity Log: All Times in UTC (PT)

08:00 (00:00) Take over from Corey
08:46 (00:46) Reset L4C WD saturations on HAM3, ITMX, and the BS
16:00 (08:00) Turn over to TJ


End of Shift Summary:

Title: 12/14/2015, Owl Shift 08:00 – 16:00 (00:00 – 08:00) All times in UTC (PT)

Support:  
 
Incoming Operator: TJ

Shift Detail Summary: Locked in Observing mode for entire shift. Power at 21.8w, range 79Mpc. Wind is light breeze (4-7mph), seismic and microseism are improving. 

There is an oscillation showing up in the 20 minute ASAIR_B_RF90_I_NORM, and SUS-PRM_MC3_LOCK signals. There are also oscillations showing up in the Pitch and Yaw ASC Control strip tools.   

• TITLE: 12/14 Day Shift: 16:00-00:00UTC (08:00-16:00 PDT), all times posted in UTC"

• STATE Of H1: Observing at 80Mpc for 12.5hrs

• OUTGOING OPERATOR: Jeff b

• QUICK SUMMARY: Wind 10mph max, useism 0.6um/s, CW inj running, lights off, PSL 21.8W.
  

  In general a good first half of the shift. 
   
  In Observing mode for past 8 hours, with a couple of exceptions as noted during the Evening shift. The IFO appears to be functioning normally. Environmental conditions are good or improving except microseism, which remains elevated and shows signs of a decline.       

   08:46 (00:46) Reset L4C WD saturations on HAM3, ITMX, and the BS. 

Title:  12/14/2015, Owl Shift 08:00 – 16:00 (00:00 – 08:00) All times in UTC (PT)
	
State of H1: 08:00 (00:00), The IFO is in Observation mode. Power at 21.8W, range 78Mpc    

Outgoing Operator: Corey

Quick Summary:  IFO has been in observation mode for the past 5 hours, except as noted by the Evening shift. Wind is a light breeze (4 - 7mph). Seismic and microseism are still a bit elevated, but improving.  All appears to be normal.

TITLE:  12/13 EVE Shift:  00:00-08:00UTC (16:00-00:00PDT), all times posted in UTC     

STATE of H1:   4+ Hrs of locking (Almost 3hrs in Observing) at around 80Mpc.

Incoming Operator:  Jeff B.

Support:  Sheila On Phone at beginning of shift

Quick Summary:

We shook the PSL table and all chambers at the corner station except ITMY individually. By far the greatest up-conversion was at the BS. The figure shows that even a 20% increase in 1-80 Hz GS13 BLRMS produces bumps at higher frequencies. The up-conversion from injected peaks is not broadband like magnet domain changing noise, and is not a harmonic series like from scattering or saturation, but, instead produces peaks that look like intermodulation products.

Robert, Jordan

• useism still high, & winds are low.
• Performed an Initial Alignment & locked up H1 with Sheila's assistance over the phone.
• Robert has completed injection work for the night.
• H1 taken to Observing at 4:52utc with a range hovering between 75-80Mpc.

After the Initial Alignment, it took about 60-90min of attempts with H1 falling out at various points (as noted in newsreel posts earlier).  Finally made it on this current attempt.  No real issues, other than needing to engage the ISS 2nd ISS Loop by hand (per Kiwamu's alog 22449).  So, the latter causes the range to look low (~30Mpc a few minutes) while engaging 2nd Loop.  I actually took a little time here to read the alog, and put the output channel on a striptool, so I would have a better idea of when to turn ON the 2nd Loop.

• useism is still high...LVEA's average is about 0.8um/s with some data points above 1um/s every once in a while.   
• Wind has noticeably died in the last 90min to mainly under 5mph

range is has been hovering at a shy 80Mpc.  NO SDF diffs

Observatory Mode is now:  COMMISSIONING (this is due to Robert beginning chamber-shaking injections; he said on the order of ~1hr.)

Off to make supper.

Making notes from Initial Alignement work, locking and chatting with Sheila:

Initial Alignment:

• Started another Initial alignment
• ALS already looked good, so Offloaded GREEN WFS.
  • While offloading, Yarm dropped.  So, offloaded by hand (tweaked ETMy Yaw slider until the M0 LOCK OUTPUT went from -14 to ~0.)
• PR3 Adjustment:  COMM Beatnote was low so adjusted PR3 a bit in mainly Pitch.  (went from 2.4 to 4.7, want to be between 4-5).
• Input Align
  • Not locking
  • Flashes mainly up to 0.55 seen on dv
  • Camera seems to show misalignment off diagonally
  • Increased XARM gain from 0.05 to 0.15 (no luck), and then to 0.2...Xarm locked after about a minute.  Went from 0.8 to about 1.0 via WFS.  Looked at the StripTool on the wall, and those channels looked to converge to 0.  
  • Offloaded...as I did this I watched PR2 & IM4's M1 LOCK OUTPUTS go to zero = GOOD!
• PRM Align, no issues.
• Dark Michelson, no issues (minor BS tweaks)
• SRC Align, no issues
• On to locking, & crossing fingers.

Locking

DRMI locking:  POP18 & 90 looked good with flashes flashing up to 150-200 on dataviewer, BUT the AS camera would have some ugly modes every min or so.  Have had a DRMI lock...but only for a about 20sec and then 18 & 90 dropped.  Might look at PRMI....oh wait, DRMI LOCKED....Stay tuned!

TITLE:  12/13 EVE Shift:  00:00-08:00UTC (16:00-00:00PDT), all times posted in UTC     

STATE of H1:  DOWN

Outgoing Operator:  TJ

Quick Summary:

After getting hand-off from TJ, will take another look at Input Alignment (will watch x-arm power on DV & also the AS camera to look for obvious misalignment...if needed, will tweak PR2.  Will also increase XARM digital gain to see if this helps as well [these were suggestions Sheila gave me over the phone]).  If this does not work, I might look at Input Pointing over the last few weeks/months to see what our current state looks like compared to the past.  

Conditions look decent (no winds, under 10mph), but useism is still roaring (LVEA is hovering around 1um/s).

Really similar to alog24151 from yesterday. Saw the oscillation buid up and had no idea how to stop it.

I have edited the ISC_LOCK guardian so that it now turns violin mode damping off before the interferometer reaches nominal low noise. This will hopefully allow us to collect ringdown data on the violin mode fundamentals.

Violin mode damping is still turned on as usual in BOUNCE_VIOLIN_MODE_DAMPING, but it now is turned off in the COIL_DRIVERS state. Thus the modes will still receive a few minutes of damping before DARM is switched to dc readout.

If this behavior needs to be reverted, there is a flag in the main() function of COIL_DRIVERS called self.turnOffViolinDamping which can be set to False.

Violin mode damping in full lock will be re-enabled once sufficient data have been collected.