TITLE: 06/16 Eve Shift: 2330-0500 UTC (1630-2200 PST), all times posted in UTC
STATE of H1: Lock Acquisition
OUTGOING OPERATOR: Ryan S
CURRENT ENVIRONMENT:
    SEI_ENV state: CALM
    Wind: 20mph Gusts, 7mph 3min avg
    Primary useism: 0.02 μm/s
    Secondary useism: 0.08 μm/s
QUICK SUMMARY:

• We just locked at NLN at 23:54 UTC
• Microseism is low, wind is low/moderate

TITLE: 06/16 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Lock Acquisition
INCOMING OPERATOR: Ryan C
SHIFT SUMMARY: Busy day of commissioning! See other alogs for details on commissioning activities. H1 is currently relocking automatically and up to TRANSITION_FROM_ETMX.

• 15:00 - Dropped observing for start of commissioning window
• 15:53 - Lockloss (ETMX glitch)
  • Running alignment
• 18:56 - Low noise; full auto acquisition
• 21:15 - Observing; end of commissioning window
• 21:35 - Dropped observing due to poor range and to touch up SQZ
• 21:41 - Observing
• 21:56 - Lockloss - alog85096
  • Taking time to reconcile SAFE SDFs before RCG upgrade slated for tomorrow
  • 22:51 - Starting lock acquisition

LOG:

Ibrahim, Rahul

The first round of B&K test results for BBSS & HRTS were posted in LHO alog 84654 . Now were are presenting the second round of test results after making the following improvements on BBSS - (a) added four side dampers (D1101299), two on each side, (b) two lower structure Y-brace strut - D1900589. Please see figure (IMG_2926) for reference. We have also removed the four optical posts which were earlier attached to the HRTS. Finally we attached four Vibration Absorbers (D1002424) to BBSS.

The B&K test results are attached below as a pdf document. We have taken 9 measurements with different boundary conditions, each of which is explained below. For each case the tri-axis accelerometer was mounted on the BBSS frame (marked as position P1 or P2 here) - X axis is along the longitudinal side of the BBSS, Y axis is the vertical and Z is transverse. For HRTS, it's shown in page 9 of the pdf document.

Test 1a (see page 2): case - BBSS (without HRTS) and no side dampers or Y-brace attached to BBSS, Accelerometer position P1.

Test 1b (see page 3): case - BBSS & HRTS and no side dampers or Y-brace attached to BBSS, Accelerometer position P1.

Next ,side dampers and Y-brace attached.

Test 2a (see page 5): case - BBSS & HRTS with side dampers and Y-brace attached to BBSS (No Vibration Absorbers), Accelerometer position P1. Hammer hits on the center of the structure.

Test 2b (see page 6): case - BBSS & HRTS with side dampers and Y-brace attached to BBSS (No Vibration Absorbers), Accelerometer position P2. Hammer hits on the center of the structure.

Test 3 (see page 7): case - BBSS & HRTS with side dampers and Y-brace attached to BBSS (No Vibration Absorbers), Accelerometer position P1. Hammer hits on the side of the structure (left or right).

Test 4 (see page 8): case - BBSS & HRTS with side dampers and Y-brace attached to BBSS (No Vibration Absorbers), Accelerometer position P2. Hammer hits on the side of the structure (left or right).

Test 5 (see page 9): case - BBSS & HRTS with side dampers and Y-brace attached to BBSS (No Vibration Absorbers), Accelerometer attached to HRTS. Hammer hits on HRTS.

Next ,side dampers Y-brace and Vibration Absorbers attached.

Test 6a (see page 11): case - BBSS & HRTS with side dampers, Y-brace attached to BBSS and Vibration Absorbers, Accelerometer position P1. Hammer hits on the center of the structure (X axis or longitudinal direction).

Test 6b (see page 12): case - BBSS & HRTS with side dampers, Y-brace attached to BBSS and Vibration Absorbers, Accelerometer position P1. Hammer hits on the center of the structure (Y axis or vertical direction).

Test 6c (see page 13): case - BBSS & HRTS with side dampers, Y-brace attached to BBSS and Vibration Absorbers, Accelerometer position P1. Hammer hits on the center of the structure (Z axis or transverse direction).

Test 7a (see page 14): case - BBSS & HRTS with side dampers, Y-brace attached to BBSS and Vibration Absorbers, Accelerometer position P1. Hammer hits on the side of the structure (X axis or longitudinal direction).

Test 7b (see page 15): case - BBSS & HRTS with side dampers, Y-brace attached to BBSS and Vibration Absorbers, Accelerometer position P1. Hammer hits on the side of the structure (Y axis or vertical direction).

Test 7c (see page 16): case - BBSS & HRTS with side dampers, Y-brace attached to BBSS and Vibration Absorbers, Accelerometer position P1. Hammer hits on the side of the structure (Z axis or transverse direction).

Test 8a (see page 17): case - BBSS & HRTS with side dampers, Y-brace attached to BBSS and Vibration Absorbers, Accelerometer position P2. Hammer hits on the center of the structure (X axis or longitudinal direction).

Test 8b (see page 18): case - BBSS & HRTS with side dampers, Y-brace attached to BBSS and Vibration Absorbers, Accelerometer position P2. Hammer hits on the center of the structure (Y axis or vertical direction).

Test 8c (see page 19): case - BBSS & HRTS with side dampers, Y-brace attached to BBSS and Vibration Absorbers, Accelerometer position P2. Hammer hits on the center of the structure (Z axis or transverse direction).

Test 9a (see page 20): case - BBSS & HRTS with side dampers, Y-brace attached to BBSS and Vibration Absorbers, Accelerometer position P2. Hammer hits on the side of the structure (X axis or longitudinal direction).

Test 9b (see page 21): case - BBSS & HRTS with side dampers, Y-brace attached to BBSS and Vibration Absorbers, Accelerometer position P2. Hammer hits on the side of the structure (Y axis or vertical direction).

Test 9c (see page 22): case - BBSS & HRTS with side dampers, Y-brace attached to BBSS and Vibration Absorbers, Accelerometer position P2. Hammer hits on the side of the structure (Z axis or transverse direction).

The raw data (.csv files) generated by the B&K software are stored at the following location,

/ligo/home/rahul.kumar/Desktop/scripts/bnk_csv_files

Ryan S., Elenna

Thge MOVE_SPOTS state is taking 13 minutes (!) to complete, because the YAW3 ADS DOF is very far off and taking a significant time to converge. Both Jenne and I have found that bumping up the YAW3 gain (PRM yaw) slowly helps converge the loops much faster.

Ryan kindly helped me update the state code to slowly increase the gain if the convergence is taking too long. We added a new timer 'ADS', that waits for one minute after the new A2L gains are ramped (so an additional minute after the 2 minute ramp time of the A2L gains). If, after that first minute, there is still no convergence, then the YAW3 gain is doubled. After that, the 'ADS' timer waits 2 minutes, and again doubles the gain. This process can happen up to three times, which should increase the YAW3 gain to a maximum value of 8. Jenne and I have found that the gain can go as high as 10 in this state. The two minute waits give the other ASC, like SRC1 and INP1 Y time to converge as the ADS pulls the PRM in faster. Once the convergence checker returns true, the YAW3 gain is set back to 1.

We will monitor how this proceeds on this locking attempt. I updated the guardian notify statements so it states when the gain is increased.

Lockloss @ 21:56 UTC after 3 hrs locked - link to lockloss tool

Massive ETMX glitch. Now taking the time to reconcile SAFE SDFs before the RCG upgrade tomorrow.

In preparation for the RCG upgrade, we are using the relocking time to reconcile SDF differences in the SAFE file.

Here are some of mine:

• I reconciled a filter change in the SUSPROC model, which corresponds to filter changes that Rahul made to update the ETM roll mode monitor filters
• I reconciled the PRC1 P and Y gains to be ZERO, the gains are guardian controlled and we want them to be zero until the ASC is engaged by the guardian
• The A2L gains for the ITMY, ITMX, ETMX have been SDFed to be the "center" locations that we have determined, since the guardian will update the A2Ls when we move the spots during locking. We want to lock with the centered position.
• I noticed that the HAM1 FF switch, while unmonitored in SEIPROC, is set to be ON, but I think we want it OFF in the safe state.

I have also determined that the unmonitored channel diffs in the LSC, ASC, and OMC models are guardian controlled values and do not need to be saved.

All looks well, aside from the known issue with LAB2 and LVEA5 seems frozen, I'll investigate that tomorrow during maintenance.

Closes FAMIS37206, last checked in alog84428

HEPI pump trends look mostly normal, HPI-PUMP_LO_CONTROL_VOUT has dropped slightly (~30).

After editing SQZ_MANGER to use the correct ASQZ angle (-)80deg as noted was an issue over the weekend 85072,  I ran SCAN_ALIGNMENT_FDS. This appeared to work fine and we had ASQZ around 14dB. However, after it was done, SQZ didn't look good and we turned on the ASC for a few minutes, this improved the high freq SQZ with the low frequency SQZ remaining the same (maybe even slightly better), see plot. Unsure why SCAN_ALIGNMENT doesn't give as good SQZ as the ASC, but the ASC appears to be working well once we are thermalized.

Later in the week we might try using the ASC again, either from the start of the lock if we think the new THERMALIZTION GRD is working well 85083, or after we have thermalized.

A single blank line was added to the end of the filter file for H1SUSAUXEX to test whether the IFO can enter the OBSERVE state with unloaded filter changes.

If loaded, this change would have no effect on the behavior of the filters.

We should be ready to go to laser safe in the LVEA.

Alenna noted that we will have CP-Y spots on the ballast baffle even when the CP is propertly aligned (which is why we eventually want to remove/fix the baffle), so I swept the CP in pitch and yaw and found a minimum in scatter coupling at about -300 p, 300 y.  The varying noise from the pump on HAM1 interfered with the measurement, so I think I can further minimize the coupling once the pump is off.

Ryan was having a hard time with locking PRMI, so we did a repeat of the REFLAIR 45 phasing as in 84630.  

We started by checking the PRCL OLG, we saw odd features there (1st attachment), phased REFLAIR45 (2nd attachment shows spectra, 3rd shows SDF), and see that the PRCL OLG looks normal again.  This is partially reversing the change to the phase that we made in 84630, we've moved the phase from 97 to 87 back to 93. 

Oli, Camilla, Sheila, RyanS

It was pointed out (84972) that our new SRCL offset is too big at the beginning of the lock, affecting the calibration and how well we are squeezing. Camilla had the idea of taking the unused-but-already-set-up THERMALIZATION guardian and repurposing the main state so it steps LSC-SRCL1_OFFSET from the LSC-SRCL1_OFFSET value at the end of MAX_POWER to the official offset value given in lscparams (offset['SRCL_RETUNE']). This stepping starts at the end of MAX_POWER and goes for 90 minutes. Here is a screenshot of the code.

To go with this new stepping, we've commented out the line (~5641) in ISC_LOCK's LOWNOISE_LENGTH_CONTROL (ezca['LSC-SRCL1_OFFSET'] = lscparams.offset['SRCL_RETUNE']) so that the offset doesn't get set to that constant and instead keeps stepping.

To get this to run properly while observing, we did have to unmonitor the LSC_SRCL1_OFFSET value in the Observe sdf (sdf).

WP12620 TW0 offload

The file copy to permanent archive ran from Fri 09:25 - Sat 10:42 (25hrs 07mins).

This morning, when H1 was out-of-lock and with the operator's permission I restarted NDS0 with its new daqdc file.

At 10:06 I started the deletion of the old files on h1daqtw0 in nice mode. Starting SSD-RAID disk usage was 92%.