TITLE: 03/15 Day Shift: 15:00-23:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Observing at 0Mpc
INCOMING OPERATOR: Corey
SHIFT SUMMARY:
LOG:
15:!5 Karen and Christrina to Mid stations. Chris Soike to EX Chiller yard

16:06 Chris back from X and heading to Y.

16:55 Vacuum alarm EX_INSTAIR_PT599_PRESS_PSIG. There was  an earlier one as well for EY PT499 " ". This is probably due to Chris visiting chiller yards at each end.

17:33 Chris back 

EQ seen at: 
USGS: Listed as occurring at 19:43UTC
Seis BLRMS:  ~22:41utc (peaked at 0.4um/s for 0.03-0.1Hz)
Terramon:  Not sure when this posted, but it was at/before arrival time of 3:30utc
Tidal signals start seeing around 22:37utc
Magnitude: 5.4
Location: Semisopochnoi Island, Alaska
Start time: 3:30utc
Lock Status: Lockloss

18:28 Lockloss - Unknown

18:29 Richard out to TCS to check on Interlock

18:31 Richard back

18:40 Trouble getting Green Xarm back. PDH VCO error - Reset

19:26 NLN 

There are two diffs in SDF regarding CO2 LASER power/setpoint. Typical SDF wanting accuracy wanting e-15 resolution. Jason was contacted and gave the OK to accept the diffs and move to Observing.

19:32 Intention Bit: Undisturbed

- No extraordinary features were found in the bullseye signals at HF/VHF frequencies.

[Summary]

During the commissioning call in the past Friday, there was a suggestion to check the HF/VHF (~MHz region) behavior of the bullseye sensor in order to make sure that the sensor is detecting what it should detect. In response to it, I have measured high frequency part of the signals coming out from the bullseye segments using an RF analyzer (an HP 4395A). I didn't find extraordinary features. I am concluding that the HF/VHF contents are not an issue.

[Some details]

The measurement was done by inserting a 9-pin Dsub breakout board right in front of the whitening board (34154) during the maintenance period yesterday. This measurement was performed after Peter and Jason had finished their flow sensor task (34811). The PSL laser was running in a nominal condition. The IMC was locked with a low power (~2 W). The interferometer was kept unlocked.

Each segment was read out before they go into the whitening board. I hooked up an HP 4395A to the breakout board using a pair of clips and a BNC cable. Unfortunately, this cheap setup was so good that it picked up lots of RF lines. Nonetheless, I didn't see an outrageous line or suspicious feature in the bullseye signals. Most of the lines are as small as -60 dBm and many are less than that except for the one at 160 MHz which I think is a pick up from the measurement cable (as high as -50 dBm). See the attached for the spectrum. I also attach the raw data just in case.

Since all four segments showed almost identical spectrum, I saved the data only for the center segment. For comparison, I also saved the background spectrum with the clips left open. Note that the background spectrum wasn't stationary. After the measurement, I removed the breakout board and completely cleaned up the measurement setup.

Starting CP3 fill. LLCV enabled. LLCV set to manual control. LLCV set to 50% open. Fill completed in 1903 seconds. LLCV set back to 14.0% open.
Starting CP4 fill. LLCV enabled. LLCV set to manual control. LLCV set to 70% open. Fill completed in 1416 seconds. TC A did not register fill. LLCV set back to 42.0% open.

WP6522

During the maintenance period yesterday, I have measured the spectra of IMC WFS DCs with and without the IMC locked. The purpose of this measurement was to cross-check the calibration factor of 1/3 which previously estimated by Daniel (31631, Nov 2016).

A conclusion:

I agree with Daniel that the IMC WFS DC signals should be scaled by a factor of 1/3 when the IMC is locked.

[Some plots]

• The 1st attachment: raw spectra of the IMC WFS DCs
  • (orange) when IMC was unlocked with the MC2 significantly misaligned. Pin = 2 W. (It had to be low power in order not to saturate the ADCs.)
  • (red) when IMC was locked. Pin = 20 W. The main interferometer was left unlocked.
• The 2nd attachment: calibrated spectra of the IMC WFS DCs.
  • (blue) when unlocked.
  • (red) when locked.
  • Also, I have included an extra factor of sqrt( 8 / pi) to get all the spectra calibrated in the unit of fractional amplitude defined as |E_{10}/ E_{00}| or |E_{01} / E_{00}|.

A side note: depending on whether the IMC is locked or not, the spectral shapes vary. This is not so surprising because when the IMC is locked, the reflection port must be dominated by non-00 modes. So the signals should contain relatively large amount of cross terms from various HOMs. So for the reason, I don't have a good explanation why they have to be a factor of 1/3. Even so, it is interesting to see some peaks come and go.

a2l measurement shows YAW out up to .85. Livingston is down.

TITLE: 03/15 Day Shift: 15:00-23:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Observing at 68Mpc
OUTGOING OPERATOR: Jim
CURRENT ENVIRONMENT:
    Wind: 15mph Gusts, 13mph 5min avg
    Primary useism: 0.04 μm/s
    Secondary useism: 0.24 μm/s 
QUICK SUMMARY:
 

TITLE: 03/15 Owl Shift: 07:00-15:00 UTC (00:00-08:00 PST), all times posted in UTC
STATE of H1: Observing at 67Mpc
INCOMING OPERATOR: Ed
SHIFT SUMMARY:
LOG:

Quiet shift. Nothing to report.

Flow rates for head 1-4 for ~a day after the sensor replacement.  The signals look relatively clean.
Head 3 looks a little ragged compared to the others.

Power meter flow and front end flow rates look okay.  The front end flow rate looks a little noisy
in its maximum recorded value.

TITLE: 03/15 Eve Shift: 23:00-07:00 UTC (16:00-00:00 PST), all times posted in UTC
STATE of H1: Observing at 71Mpc
INCOMING OPERATOR: Jim
SHIFT SUMMARY:

Recovery from Maintenance Day for the first 1-2hrs.  And most of the shift we have had sustains winds around 10-20mph (with gusts above 40mph).
LOG:

• 23:08 INJ NODE transitioned to INJ_SUCCESS state 
• 23:11-23:26:  LVEA Sweep (Corey
• 0:32 - 0:46:  OBSERVING
  • Lockloss due to PI Mode 27
• 2:14 - 2:34 OBSERVING
  • Lockloss due to PI Mode 27
• 3:32 - 6:14 OBSERVING
  • Lockloss unknown
• 3:35 TCSy Chiller Flow Low Alarm
• 6:43 OBSERVING & handing off to Jim (Have not dealt with PI Modes so far.)

Terra, Corey

PI Mode #27 was a bit touchy this evening.  After two locklosses, talked with Terra.  It's frequency was 14039.5Hz.  The original filter being used was 14038.5Hz.  We ended up switching to one a little closer:  14040Hz.  

So for this current lock, we

• Stayed at DC Readout for atleast 15min after the PI Mode lockloss.
• Once PI Mode#27 rung up, we adjusted the phase.  Could clearly saw positive and negative phase values.  
• From 90degrees went as far as -30 & ultimately settled on 60deg & we now look good.

Note For Operators After a lockloss due to a PI Mode:

1. Confirm the filter frequencies match with the actual mode seen on DTT
2. After the lockloss, stay at DC Readout for atleast 15 min to allow the PI Mode to settle down. 
3. Also check that the mode is not visible in DTT, before moving on from DTT.k

OK, off to cook supper!

After Maintenance had a few SDF diffs and went through them with Kiwamu and Nutsinee.  All of them were ACCEPTED (namely for ASC, OMCPI, PSLFSS, etc.).  

After the last few locklosses, there have been some repeated TCS diffs (attached is a snapshot of the channel).  Nutsinee said we can ACCEPT them (they are tiny changes 10^-15), and can probably NOT MONITOR them eventually...but we should wait for call from TCS person.

Terra & I also switched to a different filter for PI Mode#27, so this was also ACCEPTED.

Around 10:30 A M local time while inspecting the arm roads for tumbleweeds, John and I found a GSA vehicle stuck ~ 500 meters south of the Y End station and ~50 meters east of the access road. 
I have tracked the vehicle by license plate # to the fleet manager and she is contacting the manager that the vehicle is assigned to. I told her that in the future, anyone entering the site should, 1. Enter by the gate and not the desert and 2. Notify the control room when on site.
I also asked that the vehicle be removed tomorrow during our maintenance period.

Sheila, Jenne, Mark, Richard, Fil, Daniel

We made some progress on installing a prototype of the bullseye detector that Mark has been building in the PSL today. 

• Jenne and I went into the PSL and realized that the location I ha orignally thought of for the diode wouldn't work.  After dicussing it with Jason we deicded to move aside the beam profiler in the DBB HPO path and put the diode there.  There was about 0.65 mW of power in this path.  Jenne added a steering mirror (Y1) and a diverging lens (PLCC-25.4-103.0-UV-1064).  To install the diode we had to remove the rail that was on the table, we placed it on the portable cart on the oposite side of the enclosure. 
• We used a temporary adapter cable that Mark made that allows us to power the diode from the power strips under the table and get the signals out onto a DB9.  We used a breakout board to display the segments on a scope while we were in the enclousre.  Based on watching the signals while we steered the beam around, we think that the segments are arranged like this:
  • pin1 pin6 (seg 1) side of the diode closer to the anteroom
  • pin 2 pin 7 (seg 2) center
  • pin 3 pin 8 (seg 3) side of diode closer to HAM1
  • pin 4 pin 9 (seg4) bottom of diode
• We decided to use the unused half of the MC2 trans QPD whitening chassis for this diode.  Fil made an adapter cable that we could use to get the MC2 signals from the 25 pin Dsub from the transimpendance amplifier and the bullseye signals off the 9pin Dsub that comes out of the PSL into the whiteing chassis. (The 9 pin  cable reaches, but next time someone is in the PSL we could uncoil a little more from under the table). 
• The whitening chassis already had BIO, but there was no beckhoff code for the spare hardware.  Daneil added this, and named the whitening PSL-SPARE_QPD.  Dave did a DAQ restart for this change. 

We will hopefully get the whitened signals into the ADC channels that are already set aside and connected to AS_D in the ASC model tomorow.