Day's Activities:

• 8:15:  Karen checking out HAM6 area
• 8:49:  Running cables for Access System between HAM1-4; most of the day. (Fil & Ed)
• 8:50:  BSC (ETMx) new Controller work ["so can run on CPS only"] (Jim)
• 9:41:  BRS EX code work beginning; most of the day (Krishna & Michael)
• 9:53:  PSL crew doing measurements from outside in the morning and then working in the enclosure in the afternoon.
• 9:58:  EX to check water tank (John)
• 9:58:  EX Beckhoff stopped running last Thurs (Batch notified us & Patrick investigating).  Operator note:  One can tell if Beckhoff goes down by looking at the Slow Controls section on the CDS Overview....if anything is frozen, it's not running.
• 10:08-10:19:  HAM6 AS90 offset jumps investigation (Jenne)
• 10:26:  EY ESD measurements (Fil & Evan)
• 10:40:  HAM6 pump down; confirmed picomotor controller is DISABLED (via sitemap/LSC/picomotor/HAM6 ISCT6) (Kyle, Chandra)
• 10:42:  Possible cleanroom work (Jeff)
• 10:51:  EX seismometer holes (Robert, Manny)
• 11:10:  Getting HAM7 & 12 Annulus Ion Pumps back online (Gerardo)
• 11:30:  ITMy STS2 pulled out to be put in a hole at EX (Jim W., Robert)
• 1:08:  Entering PSL Enclosure to continue work (Peter, Jason)
• 1:52:  Climbing around BSC4 Annulus Ion Pump (Kyle)
• 2:09:  EX PEM cabling (Fil)
• 2:38:  Cimbing on HAM12 pulling signal cable (Kyle)
• 3:07:  HAM6 Vacuum gauge work (Richard)
• 3:20:  Opening Gate Valves! (Kyle, Chandra)
• 3:35:  MY CP3 work (Kyle)
• 4:03:  Craning pump cart over X-Beam Manifold to expedite pumping down of HAM6 (Kyle)

1535 -1350 hrs. local -> To and from Y-mid 

Exhaust check valve bypass opened, LLCV bypass opened 1/2 turn ccw -> LN2 at exhaust in 2 mins 10 secs. (Restored valves to as found)

Next CP3 over-fill to be in < 72 hours.

End X PEM ADC 0 channels 8-13 (starting from 0) have been activated for a PEM test. These channels are already in the science and commissioning frames as H1:PEM-EX_ADC_0_08_OUT_DQ through H1:PEM-EX_ADC_0_13_OUT_DQ at a sample rate of 2048. Until this afternoon, the values were fixed at 0.

At Bryn Pearlstone's suggestion, Weigang Liu has tried folding data
daily/monthly/O1ly from corner station magnetometer channels
beyond the ones reported on previously, where as before, 
data from October 20 (day of unplanned power outage) has been excluded. 

Attached are the summary plots, while links to the daily & monthly plots are here:

H1:PEM−CS_MAG_EBAY_LSCRACK_X_DQ
H1:PEM−CS_MAG_EBAY_LSCRACK_Y_DQ
H1:PEM−CS_MAG_EBAY_LSCRACK_Z_DQ

As before, each figure has a top graph with the raw folded (averaged) data,
a middle graph with the spectrum of the folded data, and a bottom graph
which is the inverse FFT of the lowest 40 Hz. 

These graphs are qualitatively similar to those seen before for some CS magnetometer channels
in that there is a 2-second periodicity with a positive excursion at a 1-second boundary, followed by
a negative excursion at the next 1-second boundary, and there is additional fine structure,
most notably an extra transient seen at the 0.25-second mark in successive 
1-second intervals. In addition, the X channel shows a transient at the 0.5-second mark
of each second, and the Z channel here seems most different in character from
previously examined magnetometer channels. These fine structures are seen throughout O1.

The FAMIS procedure notes the normal operating range for the oplevs is +/- 10urad (but some can still operate normally beyond this).  I'm assuming the count values in dataviewer are in urad.  Attached are the pit, yaw, & sum 7-day trends.

Notes:

• PIT:  ETMx, ETMy, ITMx, & ITMy are beyond the +/- 10urad operating range, and may require re-zeroing soon.
• YAW:  ETMx, ITMx, ITMy, PR3, & HAM2 are beyond the +/- 10urad operating range, and may require re-zeroing soon.
• SUM: Procedure does not give operating range values for SUMs, but just looking at the 7-day trend, the only oddity is that SR3 has an odd 3-day step up.  Could this be blamed on the HAM6 vent nearby?  Looking back 37-days, see a couple of these steps up over the last few weeks.

This closes out FAMIS #4670.

Kyle, Chandra

Started rough pump down of HAM6 at 10:48am local time. Dew point of blow down measured -20degC. 

I have terminated the LO inputs to the AS 90 WFS chassis (as well as the cables that normally go to these ports), so that we can see if the dark offsets are more stable without the triplexer.  Later today, I'll swap the terminators to be at the front of the triplexer box, to see if that changes things.

MONDAY MEETING:

General Announcement:  It's always best to provide data in alogs.  If you have a long entry, perhaps the bulk of this should be entered as a document in the DCC. (Vern)

SEI:  All vibration absorbers installed, and B&K measurements look good!  ISC (i.e. Evan) tested ISC items such as shutters. (Jim)

PSL:  Summary given for work from last week and HPO work continues this week. (Jason)

VAC:  5pm fri & doors on.  GV5&7 opening hopefully this afternoon (Chandra)

Miscellaneous:  

• Japanese film crew setting up camera along arm(s) for time lapse video (Keita)
• Shaker moved during HAM6 Door install (& returned) (Kyle)
• Went over Work Permits
• Reminded everyone about posting work permits for Maintenance Tuesday

COMMISSIONING MEETING

• High freq HAM6 measurments still needed (Robert)
• PSL:  survey tweaking; hard to know how long will take to complete HPO work (currently have 30W going into PMC & 27W coming out).  More tweaking today and possibly tomorrow during Maintenance.
• ISS feedback work tomorrow for Mainteance (Kiwamu)
• Engaging ETM oplevs (in addition to ITM oplevs) (Kiwamu)
• Rotation stages behaving better, more measurements when we have beam (Vern)
• BRS are waiting for wind.  ETMx code changes this week (Krishna, Michael)
• Commissioning This Week:  Starting probably wednesday?  
  • Need IMC locked to do alignment on ISCT6.  
  • POP_X work,
  • TCS?(high power, kind of good starting point, fine tuning needed), 
  • ASC? (squashing power isolation),
  • Cavity pole....
  • General locking

Jim B. notified me that the uptime for all of the PLCs on h1ecatx1 stopped updating last Thursday. Their time on the CDS overview is frozen at 7 2 45 1 (D HH MM SS). Logging on to h1ecatx1 it appears that the IOC has crashed (screenshot attached).

Follow up to alog entry https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=26512

Kyle and I quantified the leak in east door outer o-ring this morning to measure 2.5e-7 Torr-L/s. The leak was found around the 10 o'clock position, which is the location of the "old leak" at a o-ring seal repair region. This leak is small and no need to pull the door for repair. The annulus ion pump will mitigate the leak.

Details about the leak check activity:
Background of leak checker this morning after running all weekend was 6e-9 Torr-L/s.
Calibrated external leak measured 5.5e-8 Torr-L/s.
We sprayed the 2nd quadrant with instrument air while flooding the other quadrants with He. No leaks detected.
Then we taped/sealed the two adjacent notches and flooded the notch in 2nd quadrant with He. Detected a leak and continued to flow He until the leak rate stabilized at 2.5e-7 Torr-L/s.
Then we flowed He to the left and right of the notch. Leak rate decreased and then rose back to 2.5e-7 Torr-L/s as we approached 10 o'clock position. 

We will pump down HAM6 this morning. We expect roughing to take 3-4 hours before we can turn turbo pump on. After we activate turbo we will open GV5&7.

There was a flurry of injection locking relocks this morning.  All were associated with my attempts at
locking the frequency servo.  The relock counter increased from 54 to 78 during the ~1 hour period I
was dabbling with it.  The injection locking electronics needs tweaking.

    The pre-modecleaner servo needs adjusting characterising - to be done later today.

During this period we had some frame writer instabilities. These were not being recorded in the restart reports following the fw upgrade to Ubunutu, this was fixed 3/30.

model restarts logged for Sat 09/Apr/2016 No restarts reported

model restarts logged for Fri 08/Apr/2016 Unexpected restarts of h1nds1
2016_04_08 11:30 h1nds1
2016_04_08 11:31 h1nds1
2016_04_08 11:54 h1nds1

model restarts logged for Thu 07/Apr/2016 - model restarts logged for Tue 05/Apr/2016 No restarts reported

model restarts logged for Mon 04/Apr/2016 Oaf change with associated DAQ restarts, frame writer restarts are now being recorded
2016_04_04 12:13 h1dc0
2016_04_04 12:13 h1oaf
2016_04_04 12:15 h1broadcast0
2016_04_04 12:15 h1fw0
2016_04_04 12:15 h1fw1
2016_04_04 12:15 h1nds0
2016_04_04 12:15 h1nds1
2016_04_04 12:15 h1tw1
2016_04_04 12:19 h1fw1
2016_04_04 14:57 h1fw1
2016_04_04 17:26 h1fw1

model restarts logged for Sun 03/Apr/2016 - model restarts logged for Sat 02/Apr/2016 No restarts reported

model restarts logged for Fri 01/Apr/2016 ISI model changes with associated DAQ restart. Some h1fw1 instability.
2016_04_01 15:02 h1isietmy
2016_04_01 15:06 h1isietmx
2016_04_01 15:09 h1isiitmx
2016_04_01 15:13 h1isiitmy
2016_04_01 15:14 h1isibs
2016_04_01 15:17 h1isiham2
2016_04_01 15:19 h1isiham3
2016_04_01 15:22 h1isiham4
2016_04_01 15:24 h1isiham5
2016_04_01 15:28 h1isiham6
2016_04_01 15:35 h1dc0
2016_04_01 15:37 h1broadcast0
2016_04_01 15:37 h1fw0
2016_04_01 15:37 h1fw1
2016_04_01 15:37 h1nds0
2016_04_01 15:37 h1nds1
2016_04_01 15:37 h1tw1
2016_04_01 15:43 h1fw1
2016_04_01 16:04 h1fw1
2016_04_01 16:09 h1fw1
2016_04_01 16:33 h1fw1
2016_04_01 16:46 h1fw1

model restarts logged for Thu 31/Mar/2016 h1fw1 instability
2016_03_31 10:15 h1fw1

model restarts logged for Wed 30/Mar/2016 EY SEI BRS work continues, DAQ restart needed, h1fw1 instability
2016_03_30 13:12 h1isietmy
2016_03_30 13:14 h1broadcast0
2016_03_30 13:14 h1dc0
2016_03_30 13:14 h1fw0
2016_03_30 13:14 h1fw1
2016_03_30 13:14 h1nds0
2016_03_30 13:14 h1nds1
2016_03_30 13:14 h1tw1
2016_03_30 13:21 h1isietmy
2016_03_30 22:45 h1fw1

model restarts logged for Tue 29/Mar/2016 Busy maintenance day, see alog Link for details. Restart report attached as text file.

model restarts logged for Mon 28/Mar/2016 - model restarts logged for Fri 25/Mar/2016 No restarts reported

model restarts logged for Thu 24/Mar/2016 SUS PI work, end station models changes,  new OMC sender model created. DAQ FW instability starts at this point.
2016_03_24 12:37 h1omcpi
2016_03_24 12:42 h1broadcast0
2016_03_24 12:42 h1dc0
2016_03_24 12:42 h1nds0
2016_03_24 12:42 h1nds1
2016_03_24 12:42 h1tw1
2016_03_24 12:43 h1susitmpi
2016_03_24 12:45 h1susetmxpi
2016_03_24 12:47 h1susetmypi

model restarts logged for Wed 23/Mar/2016 No restarts reported

model restarts logged for Tue 22/Mar/2016 Maintenance, new SUS PI code and end stations, new corner station model created. DAQ restart. Related QUAD change for PI.
2016_03_22 11:10 h1susetmx
2016_03_22 11:10 h1susetmy
2016_03_22 11:12 h1susetmxpi
2016_03_22 11:12 h1susetmypi
2016_03_22 14:27 h1susitmpi
2016_03_22 14:28 h1susitmpi
2016_03_22 14:30 h1susitmpi
2016_03_22 14:59 h1broadcast0
2016_03_22 14:59 h1dc0
2016_03_22 14:59 h1nds0
2016_03_22 14:59 h1nds1
2016_03_22 14:59 h1tw1
2016_03_22 15:00 h1susitmpi

model restarts logged for Mon 21/Mar/2016 - model restarts logged for Fri 18/Mar/2016 No restarts reported

model restarts logged for Thu 17/Mar/2016 ISI suspoint work, newtonian noise h1ngn model created for first time, DAQ restart.
2016_03_17 13:08 h1isibs
2016_03_17 13:10 h1isiitmx
2016_03_17 13:12 h1isietmx
2016_03_17 13:12 h1isietmy
2016_03_17 13:15 h1ngn
2016_03_17 13:19 h1dc0
2016_03_17 13:19 h1nds0
2016_03_17 13:19 h1nds1
2016_03_17 13:19 h1tw1
2016_03_17 13:21 h1broadcast0

model restarts logged for Wed 16/Mar/2016 - model restarts logged for Tue 15/Mar/2016 No restarts reported

model restarts logged for Mon 14/Mar/2016 NFS server upgrade. All frontend models and DAQ were restarted. No detailed report given as times are not accurate due to server reboots.

model restarts logged for Sun 13/Mar/2016 Missing report due to server upgraded

model restarts logged for Sat 12/Mar/2016 - model restarts logged for Fri 11/Mar/2016 No restarts reported

model restarts logged for Thu 10/Mar/2016 Problems with LSC which required a reboot.
2016_03_10 09:47 h1ioplsc0
2016_03_10 09:48 h1ioplsc0
2016_03_10 09:49 h1lscaux
2016_03_10 09:49 h1lsc
2016_03_10 09:49 h1omc

Today the injection locking of the high power oscillator (HPO) was not as good prior to the water
leak on Wednesday.  We examined the overlap between the front end (FE) and the HPO and tweaked it.
The beam profile appeared to improve as a result.  The reference level for the injection locking
was altered from -1.20V to -1.30V.  The injection locking appeared more robust with this setting.
No relocks were encountered during the lunch break.

    Using the high power attenuator, the output of the HPO was reduced to ~29W as measured by the
water cooled Ophir power meter on the table.  The beam was aligned to the pre-modecleaner (PMC).
Initially the reflection locking photodiode output was:
  L02 position = 61 mm on rail, 10 on micrometer
  unlocked = 922 mV
    locked = 185 mV
  visibility = (unlocked - locked ) / (unlocked) = 79.9%
We moved the mode matching lens L02 towards the HPO.
- L02 position = 56 mm on rail
  unlocked = 917 mV
    locked = 95 mV
  visibility = 89.6%
- L02 position = 49 mm on rail (this is as far as we could move it because another mount was in
                                the way)
  unlocked = 907 mV
    locked = 95 mV
  visibility = 89.5%

~26W was measured after the IO EOM.  This value is consistent with the PMC visibility.

    The frequency servo was locked after a minor tweak to the vertical alignment of the beam.
~60 mW was incident on the reference cavity.

    Things are by no means optimised.  All servos were left running as a test.  Obviously both
the FE and HPO are running.  The relock counter was reset, the power watchdogs for both lasers
have been engaged.  Autolock for the frequency servo was left dis-engaged.

    The values for the PMC transmission reported on the MEDM screens are out of whack.  There
are a few other signals that need to be checked out too.

    We will crank up the power to the PMC next week.

 Should the laser(s) trip for some reason, do not attempt to resuscitate them! 


Jason, Peter

Not pumping HAM6 chamber over the weekend because we found a leak on east door. We will need to pull off door to repair o-ring leak on Monday if leak rate is too big. Quantifying leak rate early Monday morning, after leak checker has had time to run and stabilize. North and South doors passed leak check test. 

Michael, Krishna,

No significant wind-storms yet. As discussed yesterday, in the quiet conditions (0-10 mph), when we tried to use sensor correction on the 90 mHz blend, we improved isolation in the 0.1-1 Hz region, but increased rms motion of the platform (as seen by the CPS) in the 10-30 mHz region. We tried to see if we could do a better trade-off.

We have been using a broadband sensor correction filter (Mitt_SC), originally made by Rich M. for the Z direction. After a few iterations, we came up with the filter shown in the first pdf, named Mitt_SC3. It has more gain-peaking in the 20-70 mHz region (where we get the best tilt-suibtraction), but suppresses motion below 20 mHz by a factor of ~3. I guess it will approach the Hua filter ultimately if we wanted even sharper roll-offs.

The attached pdfs show the result of this filter at EndY and EndX respectively in plots which have the same format as before. In this case, the overall rms of the CPS sensors is the same or smaller when using SC as compared to the 90 mHz blends alone. We still have a factor of 2-10 isolation improvement in the 0.1-1 Hz band as measured by the T240s on stage 1.

(Richard M, Filiberto C, Kyle R, Gerardo M)

"New" high voltage cable was pulled yesterday along with new fiber.

The cable was tested yesterday, hi-POT tested up to 5k, then both ends terminated.

Fiber was tested today, all good.

Today the power supply was setup on the shelf and powered on, ion pump is working good thus far.