For reference, here is an email I sent today to lho-all reporting recent CDS backup systems problems, short term and long term solutions:

Over the past few weeks we have developed problems with the CDS backup systems, namely:

Yesterday, the masses on the STS2s were centered but I should have monitored the mass positions more in real time as the centering doesn't always take the first or second time around.  While we did improve things maybe, there are still problems: six of the nine masses (3 masses 3 sts2s) were out of spec but after centering, there are still 3 of the 9 out of spec.

At EndX, the STS2 had two masses out of spec by about 50% (7500 cts vs 5000);  after centering one of those came into spec but the other overshot and is now out by a factor of 5!  Attached is ASDs of before and after.  The refs are from 2am Tuesday and the currents are from 2am this morning.  The useism is likely a bit higher early this morning (not as high as it is right now though.)  There is not anything glaringly wrong to me here.  In general the current traces are higher than the references but again that could just be the actual ground motion.  I thought such a large mass position problem would be obvious but it is not to me.  I'll do a comparison of LVEA instruments at the same time.

Plot shows ETMX and ETMY Stage 1 X loaction and Y location over the last 24 hours. 

During the last 24 hours, useism has increased from 0.4um/s to 1um/s.

ETMY ISI (left, top and bottom) shows a steady increase in the amplitude of the oscillations in X Location and Y Location.

ETMX ISI (right, top and bottom) shows an increase in the amplitude of the oscillations in X location and Y Location, however, the increase in amplitude of the signals, and the signals themselves are anything but "smooth."

Activity Log: All Times in UTC (PT)

08:00 (00:00) Take over from TJ
12:00 (04:00) Dozens of ETM-Y saturations alarms concurrent with RF45 noise.
12:45 (04:45) Temperature alarm on CS Zone 4 duct. 
12:58 (04:58) Temperature alarm on CS Zone 1A duct.
13:27 (05:27) The ETM-Y/RF45 saturations have stopped.  
15:19 (07:19) Three ETM-Y/RF45 saturations in 8 seconds. 
15:44 (07:44) Bubba – Into the Cleaning area to get a headset 
15:46 (07:46) Bubba – out of the cleaning area
16:00 (08:00) Turn over to Cheryl 



End of Shift Summary:

Title: 12/22/2015, Owl Shift 08:00 – 16:00 (00:00 – 08:00) All times in UTC (PT)

Support:  
 
Incoming Operator: Cheryl

Shift Detail Summary: Starting at 12:00 (04:00) dozens of ETM-Y saturations with simultaneous RF45 saturations. These continued until 13:27 (05:27). There were a few additional saturations after 13:27.

Other than the RF45 saturations, it was a good night for data collection. Seismic and microseism continue to increase, as does the wind. 
  

   Starting at 12:00 (04:00) getting dozens of RF45 and concurrent ETM-Y saturations. By 12:55 (04:55) the rate of saturations had slowed but continues.   

   A shift without drama so far, with the IFO locked and Observing with good range. Environmental conditions however are deteriorating. Wind speeds are up into the mid-teens, with several gusts over 20mph. Seismic trend is upward, with a few EY peeks well over 0.1um/s. Microseism also has an upward slope, centered around 0.8um/s.

   There are a couple of large storm systems moving through the Bering Sea and the Gulf of Alaska over the next few days. The data buoys on the Washington coast are recording near shore wave heights up to 16 feet and winds at near gale force (up to 38mph).       

Title:  12/23/2015, 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 Observing mode for the past 2.5 hours. Power and range are at normal levels. Wind is currently a gentle breeze (8-12mph) and building. Seismic and microseism are both rising as well. Monitoring CP-3 N2 levels.     

Outgoing Operator: TJ

• TITLE: 12/22: 00:00-08:00UTC (16:00-00:00 PDT), all times posted in UTC"

• STATE Of H1: Observing at 80Mpc for 2.5hrs

• SUPPORT: Evan G, Darkhan

• SHIFT SUMMARY: Had one mysterious lock loss, but didn't have too much trouble getting it back up.

• INCOMING OPERATOR: Jeff B

• ACTIVITY LOG:

• 01:26 Dave/Jim done with DMT work, past data would be lost on range and seismic plots.
• 03:59 Lockloss
• 05:35 Observing

Back to Observing.

Lost lock a few times when trying to switch from PRMI to DRMI (shot attached). After I would lock PRMI, adjust to maximize the signals, then try to transfer, it wouldn't work so it would then try to lock DRMI. After a few minutes it would seem like it would lock but then look as though it was trying to transfer again. Hard for me to describe it. Also lost lost once at Coil Drivers, but other than that it wasn't anything out of the ordinary.

Not sure why yet, everything was looking great.

SudarshanK, DarkhanT, EvanG

Pcal PD Calibrationat at ENDY was completed today. The results are within the variation seen in the past. A more detail report coming soon.

• TITLE: 12/22 Eve Shift: 00:00-08:00UTC (16:00-00:00 PDT), all times posted in UTC"

• STATE Of H1:Observing at 78Mpc for ~1 hours

• OUTGOING OPERATOR: Cheryl

• QUICK SUMMARY: Seems to have been a quick recovery form maintenance day! Wind is <15mph, useis 0.5um/s, PSL 21.9, CW inj running.

State of H1: Low Noise, A2L measurements finished, now in Observe

JeffK and I talked to LLO, and they are working on a measurement, and expect to be back in Observe soon.

Help with Mantenance and Relocking: Kiwamu, JimW, Ed, JeffK, Jenne

Relocking Details/Issues:

1. MICH DARK did not lock.  It WAS well aligned, but would not catch.  MICH DARK is needed for end of O1 calibraitons, so some effort to lock and or diagnose the issue was made, and not successful.
2. H1 broke lock at ENGAGE_ASC twice, and JimW offered that sitting in each part, part 1, part 2, and part 3, and waiting for ASC signals to settle each time, has helped get H1 through those steps.  This issue and the necessary work around are new in the last two weeks.
3. H1 then stalled at engaging the ISS 2nd Loop, which had to be engaged manually.

Currently: H1 in Observe at 23:24:36UTC, and as of this alog, range is 80Mpc.

The volume for the alarms were so very quiet this morning I couldn't hear them, and the volume for the verbal alarms was reasonable, and of course, when I tried to raise the alarm volume, the verbal alarms were too loud.

JimB discovered that the sound settings on the computer are seperated into "alarms" and "computer" volume sliders, and the alarm volume was set very low.

I discovered that to have the alarm volume about the same as the verbal alarm volume, the volume on the alarms needs to be at max. and the verbal alarms need to be at about 1/2 of the total possible volume.  

Picture attached.

I increased the power on the BS and SR3 oplev lasers this morning by ~5%.  I used the voltage read out of the "Current Monitor" port on the back of the laser (this port monitors the laser diode current, outputs a voltage).  The old and new values are listed below, as well as the new SUM counts.  Since I had to open the coolers the lasers are housed in they will need ~4-6 hours to return to thermal equilibium; at that point I can assess whether or not the glitching has improved.

• BS OpLev
  • Old voltage:  0.987 V
  • New voltage:  1.036 V
  • New SUM:  ~33500 counts
• SR3 OpLev
  • Old voltage:  0.889 V
  • New voltage:  0.933 V
  • New SUM:  ~40900 counts