Jennie W, Sheila.

I chose a high range time from a lock during O4a, specifically 2024/01/15 21:41:15 UTC, and compared the OPLEV values with todays.

See attached image.

OpLEVs which are the same as in observing: SR3 PITCH/YAW, PR3 YAW, ETMX PITCH/YAW.

OpLEVS which have changed:

ETMY PITCH by +24 cts.

ETMY YAW by -1.8 cts.

ITMY does not count as it is mis-aligned for OMC single bounce measurements.

ITMX YAW by -10 cts.

ITMX PITCH by -5 cts

BS PITCH by +14 cts.

BS YAW by - 10 cts.

PR3 PITCH by 0.2 cts.

Used Sheila's OPLEV template from /ligo/home/sheila.dwyer/ndscope/SUS/sus_op_levs.yml.

(Randy, Mitchell, Betsy)

The West Bay cleanroom work is complete so the large cleanroom has been turned off again.  Room turned off ~9:30am this morning.

(The 4x 3IFO QUAD upper structures have now been moved to their smaller storage containers, relabeled , and ICS records re-organized.  The large ISI storage container that they came out of still houses the 2 Elliptical baffle down tube assemblies and partial TMS telescope subassemblies.  Photo pictures have been also added to the containers for our future selves.)

At the start of the break Jim and I removed all subbordinate state requests in the SEI_ENV node so that we could watch what the automation there would do for the different environmens over the break (alog75498). I've now revert all the changes and we are back to normal operation of SEI_ENV.

Over the break, SEI_ENV reacted the the environment as we expected. There were a few times at threshold useism points that it would transition states for 1 hour, then transition back. The frequency of these times is small enough that we feel it's good as is.

15:40 UTC started efforts.

Checked ITMY was mis-aligned and IMTX aligned. Beam on AS AIR camera at HAM6.

Turned on SR2CP and SR2CY ASC loops with gain of 10 after checking input and output matrixes to check they were still routed just to SR2 position.

Moves beam up to centre on AS C QPD.

Made beams more aligned on QPD A and B.

Dialed the PZT offset PZT2 up from about 30 counts to find the TM00 mode at abput 2mA on the DCPD_SUM_OUPUT.

Locked with gain of one after turning off boost and int filters and clearing history.

Turned gain up to 10, waited, turned on int, waited, turned on boost, waited, turned gain up to 24.

Beam still roughly centred on OMC QPD A and B.

Movement unlocked OMC at 18:12 UTC but it relocked without me doing anything which is good.

Turned on ASC loops with gain of 0.025 on mastergain and no integrators and they locked well within 1 count of 0 on output of all 4 OMC ASC loops. Then I turned on the integrator for POS X loop and POS X and ANG X outputs started to go crazy so I turned it off.

cdsutils is updated to 1.7.0 in the default conda environment on all workstations.  A list of changes is forthcoming.

Thu Feb 29 10:10:01 2024 INFO: Fill completed in 9min 57secs

TJ, Camilla. Aim to check CO2Y laser is at it;s best temperature after recent 76007 power degradation, and we never got the  expected ~50W from this laser after refurb.

I temporarily commented out the temperature checkers in TCS_CO2.py and reloaded for ITMY.

Made a script /tcs/common/scripts/power_adj_scripts/co2_temp_stepper.py to: take the TCS_ITMY_CO2 guardian DOWN, step the chiller setpoint (H1:TCS-ITMY_CO2_CHILLER_SET_POINT_OFFSET), wait 50 minutes, bring the TCS_ITMY_CO2 guardian back up to LASER_UP, wait 10 minutes and then repeat. This is so we can see the laser changing and also a PZT scan (while laser relocking) at each temperature step.

Stepping over chiller setpoints from 19.5 to 23.75 degC in 0.25deg chiller steps. Expect this run 18:00UTC to ~12:00UTC (4am tomorrow) when it will leave the laser in LASER_UP with the setpoint 21.6degC.

I centered the IMC WFS this morning in preparation for the continuation of the O4 observing run. The process was as follows:

1. Offload IMC WFS by taking IMC_LOCK to 'MCWFS_OFFLOADED'
2. Take IMC_LOCK to 'OFFLINE'
3. Using the MCWFS centering scope and picomotors on the IMC overview screen, center the signal on each WFS (scope screenshot attached)
4. Accept IMC PZT offset SDFs from the previous offloading (attached)

Following our PSL work on Tuesday (alog76002) during which the PMC alignment and output power changed, I took the opportunity this morning to recalibrate the PSL rotation stage.

Since there have been slow controls restarts in the past weeks, the rotation stage settings had been reset, so I started by putting those back according to trends. The rest of the process went as follows:

• Took IMC offline and paused LASER_PWR guardian
• Ran the script /opt/rtcds/userapps/release/psl/h1/scripts/RotationStage/MoveRotationStage.py to create PSL_rotStageCalib_29Feb2024.txt (attached)
• Changed PSLvals in CalibRotStage.m for correct file name then ran to create calibration curve (attached) and get new fit values (in table)
• Input new fit values into calibration and accepted new values in SDF (screenshot attached)
• Searched for HOME on rotation stage
• Resumed LASER_PWR guardian to go back to 2W input power

FAMIS 26285

I'm not seeing anything new on this check. EX fans were swapped a few days ago since fan1 vibration started to increase. Fan2 has started to get slightly quieter since startup.

CO2X laser tripped off yesterday at 18:23UTC (10:23am). Unsure why, the OPs alog 76036 doesn't show any work happening around the area and neither the RTD, IR and FLOW alarm tripped. Turned back on with GATE button this morning.

TITLE: 02/29 Day Shift: 16:00-00:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Planned Engineering
OUTGOING OPERATOR: None
CURRENT ENVIRONMENT:
    SEI_ENV state: CALM
    Wind: 7mph Gusts, 5mph 5min avg
    Primary useism: 0.03 μm/s
    Secondary useism: 0.50 μm/s
QUICK SUMMARY: GV2 was opened yesterday, but 5 & 7 remain closed for this week. More leak checking and single bounce/OMC measurements planned for the day.

Naoki, Dhruva, Nutsinee

We recovered the homodyne and got 6.5dB squeezing with PMC and 40 times more CLF power as shown in the attached figure.

First we aligned LO and seed to homodyne. We got 97% visibility in SQZT7, but we have not done fine tuning of ZM alignment and PSAMS. We will do it tomorrow. To lock the homodyne LO, we reverted the cabling for SQZ angle dither lock in 74223. We unplugged the "ISC_SQ_96" cable from IN2 of LO CMB and plugged the "ISC_SQ_232" cable.

Then we optimized the OPO temperature. NLG is 16.7 with nominal 80uW of OPO trans. After optimization of NLG, we got 6.5dB squeezing. The CLF6 RFMON is 6, while it was -26 during O4a so we have 32dB = 40 times more CLF power. We measured the CLF power just before the fiber and it is 0.7mW. The CLF_LAUNCH_DC_POWERMON is calibrated to this value.

We increased CLF CMB gain from -8dB to 0dB to reduce the noise around 1kHz. We still have the noise around 1kHz, but it could be further reduced by tuning CLF/LO gain and reducing the CLF power.

Today's activities:
- HAM8 was roughed down, currently the turbo is pumping. It is at ~9E-6
- HAM7 pumpdown status: ~5.1E-7 Torr
- GV2 was opened, so the preserved vacuum ballast in the X-manifold pulled the corner's pressure further down
- Corner pumpdown: ~3E-7 Torr, ~195 hours after the HV pumping started
- Corner (and HAM7) further schedule: Ion pumps (IP1, IP2, IP3, IP4, IP14, IP19) valve-in: 2-29; Valve together the corner, HAM7, relay tube, X manifold (open RV1): 2-29; Turbo pump valve-out: 3-1; RGA scan #2: 3-4; GV5 & GV7 open: 3-4
- EX pumpdown status: 2.3E-8 Torr.
- EX further schedule: RGA scan #1: 2-29; Ion pump valve-in: 2-29; Turbo pump valve-out: 3-1; RGA scan #2: 3-4; GV20 open: 3-4
- The HAM6 RGA has connection and/or hardware issues; its ion-pump was found switched off, which could cause issues with the filaments
- The MX Hepta header filter has been finally added, see pictures attached

WP 11672
ECR E2200043

Cabling for the HEPI Pump Controller Beckhoff upgrade completed. Network and power cables pulled from the mechanical mezzanine, over the bridge pipe, to BSC2. Upgrade not scheduled until after the 04 run. Modifications of control panels for the motor readback signals have not been completed.

TITLE: 02/28 Day Shift: 16:00-00:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Planned Engineering
INCOMING OPERATOR: None
SHIFT SUMMARY:

Vacuum team closed Gate Valve 2 in the LVEA.
RGA scans on End X and HAM7 are ongoing.
SQZers had some success on the SQZ tables by aligning the Homodyne and 40X CLF power!


LOG:

Keita, Jennie W

Keita and I were tuning the alignment of SR2, OM1, and OM3 to improve alignment into OMC after the vent and swap to the new OMC.

We started just after 22:00:00 UTC on the 27th.

Note: HEPI is still locked on HAM5 and HAM6 for vacuum work so we may have to move the mirrors again once these are unlocked.

The beam was not well aligned on the AS_C QPD.

Firstly we turned off the the offsets in H1:ASC_OMC_{A,B}_{PIT,YAW,RIN} and in H1:OMC-ASC_QPD_{A,B}_{PIT, YAW} as these are on the output of the OMC QPDs and were set for the old OMC and alignment.

Secondly:

• we turned on the matrix element (INMATRIX_P_7_27) in the ASC PITCH input matrix to route AS_C_DC input to SRC2_P.
• Then we changed the output pitch matrix element (OUTMATRIX_P_9_7) from -7.08 to 0 to ensure output from SRC2 does not got to SRM.
• We then turned on the gain in the H1:ASC_SRC2P to be 10 so we could align SR2 then get the loop to take over.
• We tweaked up the pitch alignment sliders for the optic to drive ASC-AS_C_SUM to zero until the ASC loop took over.
• We did the same for the yaw degree of freedom.

Thirdly:

• we changed the OMC_ASC_DOF2TT matric to only feed OM1 yaw to the POS X direction and OM1 pitch to the POS Y direction.
• We ran an excitation on the alignment of OM1 in pitch and yaw till we saw it on ASC-OMC_A phtodiode.
• Then we tweaked the alignment sliders till the beam was well centred in pitch and yaw.

After this we tried turning on the OMC ASC but noticed it ran away in pitch and yaw.

We went into the OM1 sus screen and noticed that there are integrators on in the OM1 M1 Locking Filters, so we should not use additional integrators in the OMC ASC filters in this case. We cleared the hostory and changed the alignment offsets to compensate and get the beam back on QPD A.

Fourthly:

• we changed the OMC_ASC_DOF2TT matric to only feed OM3 yaw to the ANG X direction and OM3 pitch to the ANG Y direction.
• We ran an excitation on the alignment of OM1 in pitch and yaw till we saw it on ASC-OMC_B photodiode.
• Then we tweaked the alignment sliders till the beam was well centred in pitch and yaw.

We set each loop up individually with gains that worked but then had to redo these once all four ASC loops were running as there is some cross-coupling.

The two ANG X and Y loops have integrators on as the OM3 suspension does not have integrators in the OM1 M1 locking filters.

The final loops gains are shown in the first screenshot.

Camilla pointed out that OM2 had high alignment offsets so we tried to slowly tune the pitch offset down while offloading this on the OM3 pitch offset.

Finished our alignment efforts at about 2:00:00 UTC on the 28th.

I have left the overall OMC ASC gains at zero and the SR2_P and SR2_Y gains at zero.

Second image is the OMC QPD SUM outputs and the YAW and PITCH outputs during the last part of the alignment.

Third screenshot is the OMC control screen before we started.

Fourth screenshot is the ASC P OUTMATRIX before we started.

Fifth screenshot is the ASC Y OUTMATRIX before we started.

Sixth screenshot is the slignment sliders before we started (except for some small changes I made to OM1 before Keita came to help). I think the original values for OM1 from yesterday were 651.6 counts in Pitch and 63.6 in yaw.

Seventh screenshot is the OMC_ASC_DOF2TT moatrix before we started.

Eighth is the OMC ASC servo filter banks before we started.

After aligning ITMY and checking HWS, I've set the ITMY ring heaters to be on at 2W/segment for the next 12 hours: ~7:30pm to 7:30am PT (03:30UTC to 15:30UTC). ITMY will then spend tomorrow cooling down. This test should help the IFO modeling team get more recent data on the effect the ring heaters have.

Using script: python3 /tcs/common/scripts/power_adj_scripts/ring_heater_schedule.py ITMY -s 'now' -d 12 -p 2.0  

This morning after Fil switched ON the ESD HV on EX (EY was already ON), I took the OPLEV charge measurements on ETMX and ETMY. I will post the results after processing the data.

Both the suspensions were restored after the measurements were complete.

Also, I noticed that on ETMX the amplitude of L3 calibration lines was set to zero since Jan 16, 2024 (when last measurements were taken), I have set it to the nominal value of 0.12 after trending it.