[Daniel D, Kar Meng, Sheila, Eric]

Today we continued with the VOPO install.  The pump beam is now aligned to the cavity.  Unfortunately, the cavity axis was different enough that we had to walk things quite a bit to optimize the alignment.  We double checked the mode matching for the pump path with the new cavity and it is sitting at around 85% with 15% in the bullseye mode.  

We also roughly aligned the CLF path by aligning the CLF reflection to the green transmission.  We then switched to the seed beam with the injection power turned up all the way and were able to see a beam on the card when the cavity is scanning.  Currently, the transmitted beam is clipping on SFI 1.  We will continue with the alignment tomorrow and finish optimizing the seed beam once we can get far enough down the SQZ path to reach a PD. 

TITLE: 12/18 Day Shift: 1530-0030 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Planned Engineering
INCOMING OPERATOR: None
SHIFT SUMMARY:

IFO is in IDLE for PLANNED ENGINEERING

Lot's of good progress today:

• HAM7 Scattered light investigation - ONGOING - Green light is aligned to OPO from light pipe, and red is roughly aligned  - alog 88571, 
• HAM1 Go into PSL and add lenses - UNDONE 
• HAM1 install periscopes - DONE (build alog 88574)
• HAM1 load in/stage all JAC hardware, plug in JM1 and JM3 to start testing controls - ONGOING - dealing with some controls/osem issues on JM1. Continuing tomorrow - alog 88578
• BSC2 FARO work - ONGOING - Jason and Ryan C are still in the LVEA

Other:

• DAQ Restarted + misc CDS work - alog 88577OK
• JAC infrastructure added to medm and guardian by OPS (Ryan S, Ryan C, Oli, TJ) - alog 88570
• SATMON Updated for new 28 bit DACs - alog 88573
• HAM3 CPS glitching fixed
• Sensor correction is off due to IAS work
• IMC is unlocked, light pipe is off/shuttered overnight

Will edit to add alogs that are submitted after shift.

LOG:

Betsy, Fil, Rahul

Today we kicked started the installation activities in HAM1 chamber for the Jitter Attenuation Cavity (JAC). Given below are the things we placed on the ISI table - they are all roughly positioned and dog clamped. 

1. Tip Tilt JM1 - now connected to electronics chain, having some issues with the bosem adc counts etc, will continue looking into it.

2. Tip Tilt JM3 - now connected to the electronics chain, bosem centered, will proceed for health checks once the chassis and electronics chain looks okay.

3. The two periscopes for the JAC, Type 121 and 132 - assembly report posted by Jennie - 88574.

4. Some optics on Siskiyou mount were also added to the table.

I am attaching pictures which shows the above mentioned things added to the table - and for comparison a picture showing before any addition was (here) made.

Fil also performed group loop checks on JM1 and JM3 and did not find any issues with them.

[Oli, Erik]

Oli rearranged some ADC channels to match the current design.  The model was rebuilt and restarted.  No DAQ restart needed.

Dave, Jonathan,

We restarted the daqds today, daq1 leg at 15:56, and the daq0 leg at 16:01 localtime.

This was in support of two workpermints

12945 - monitoring the daq kafka connector as we push data into the NGDD system in ldas (NGDD = next generation data delivery)

12946 - TJ added two guardian nodes to help manage JM1 and JM2

Wed Dec 17 10:11:51 2025 INFO: Fill completed in 11min 47secs

Jennie W, Rahul, Betsy

Yesterday Rahul and I built two periscopes for the beam translation from input PSL beam in HAM1 to table height for JAC input and output of JAC back to beam height required for beam into HAM2 input periscope.

The one between the PSL and JAC is type -121 in drawing LIGO-D1201342. Left-side in pic.

The one between the JAC and HAM2 is type -132 in drawing LIGO-D1201342. Right-side in pic.

We had to leave off one of the hex screws that attaches the periscope stiffener (part 26) to the periscope base (part 20) as the hex screw hole thread became stripped and we could tighten it. I think this is either part number 7 or 19. These are two hex screws of different lengths and we tried both but neither would tighten. Betsy and Rahul decided that the structure seems stiff enough without it.

Extra pic of Rahul and Betsy with one of the periscopes.

At the end Betsy and Rahul weighed the two periscopes.

Here is 121 and here is 132.

I've updated the saturation thresholds on SATMON for the following suspensions which have had their DAC cards upgraded to 28bit earlier this week. I still have to add JM1 and JM3.

RM1 (M1)

RM2 (M1)

PM1 (M1)

IM{1,2,3,4} (M1)

PRM (M1, M2, M3)

PR3 (M1, M2, M3)

After taking the first tranfer function, we saw Length look weird, so we measured the wire lengths then replaced one of the wires and remeasured JM3. Before replacing the wire, and after replacing the wire. The wire replacement made everything look nicer, shifted the peaks into a more correct location. While it is still not perfect and looks a little different, we should be able to damp it, the magnitude differences are likely from the coil drivers. 

The measurements are located in: /ligo/svncommon/SusSVN/sus/trunk/HTTS/X1/JM3/SAGM1/Data/

After replacing the wire:
2025-12-11_2300_X1SUSJM3_M1_WhiteNoise_L_0p02to50Hz.xml
2025-12-11_2300_X1SUSJM3_M1_WhiteNoise_P_0p02to50Hz.xml
2025-12-11_2300_X1SUSJM3_M1_WhiteNoise_Y_0p02to50Hz.xml

Before replacing the wire:

2025-12-11_2000_X1SUSJM3_M1_WhiteNoise_L_0p02to50Hz.xml
2025-12-11_2000_X1SUSJM3_M1_WhiteNoise_P_0p02to50Hz.xml
2025-12-11_2000_X1SUSJM3_M1_WhiteNoise_Y_0p02to50Hz.xml

Ryan S and I edited the sustools.py, susconst.py, and created SUS_JM{1,3}.py, then started the two new nodes. Other than the susconst file, these are common code so I will let LLO know. There were a few inconsistencies and it looks like PM1 was forgotten in a few places so we added those instances in. That node has been working so I don't think it has been an issue, but now it's consistent with the other nodes.

We briefly tested the node by tripping the suspesion, which isn't actually hooked up yet, and running it through all but its coil switching states. All good. Ryan and possible others will edit the medm screens that needs the new JMs on them. 

TITLE: 12/17 Day Shift: 1530-0030 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Planned Engineering
OUTGOING OPERATOR: None
CURRENT ENVIRONMENT:
    SEI_ENV state: MAINTENANCE
    Wind: 40mph Gusts, 26mph 3min avg
    Primary useism: 0.15 μm/s
    Secondary useism: 0.59 μm/s 
QUICK SUMMARY:

IFO is in IDLE for PLANNED ENGINEERING

A look at today's activities:

• HAM7 Scattered light investigation
• HAM1 Go into PSL and add lenses
• HAM1 install periscopes
• HAM1 mode matching check-in
• HAM1 load in/stage all JAC hardware, plug in JM1 and JM3 to start testing controls
• BSC2 FARO work

M. Todd, G. Vajente, L. Dartez

Tuesday 12/16

1. This morning we got the power monitor working with the old ICS computer that seemed to have the software on it already. We were not able to get the QPD software working because it requires Windows10 or newer; of course, this is only temporary because the other signals will be routed into the bekhoff eventually.
2. We got the package that arrived today with the beam profiler, and pins for the PDs. We took out the socket from one of the PD boards, but decided to have the chassis machined which should allow the sockets to fit in the chassis correctly.
3. We began, and made significant progress, on the alignment process for the optics. We got the beam mostly aligned well through all the optics, including lenses, to the output of the optics table. A few caveats
   1. We added a dogleg to the initial laser path so that the cables going to the feedthrough panel would not interfere with the laser .
   2. The first leg of the beam path along the long edge nearest to the rotation stage does not have enough room and will need to be readjusted.
   3. We will want to put the profiler in near the exit to see if the telescope is functioning as designed.
   4. The ZnSe lens needs to be mounted as well as the flipper. We still need to test the flipper.

[Daniel D, Kar Meng, Eric]

We made a bit of progress witth the new VOPO install.  The cavity is now dogged down with all cables installed.  We started to align the green path.  Horizontal alignment looked pretty good after the swap, but the vertical alignment was actually a little off.  We suspect that the cavity axis is tilted a bit between the old and new cavities.  Its also possible that the green fiber mount just got bumped when we were swapping out the cable in the bracket behind the VIP yesterday.

After walking the vertical alignment a bit we are now seeing green flashes and are near the center of the green refl iris on SQZT7.  We plan to finish aligning once we set up the pzt driver and scope tomorrow.  The CLF alignment looks quite off at the moment.  We'll align the clf to the transmitted green beam once the former is optimized.  

TITLE: 12/17 Day Shift: 1530-0030 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Planned Engineering
INCOMING OPERATOR: None
SHIFT SUMMARY: Busy afternoon! We changed plans a bit after we remembered that the HAM7 crew needed the IMC locked for their scattered light investigation, so work in HAM1 and the PSL to prep for JAC installation was put on pause. Locking the IMC went fairly smoothly; MC1, MC3, and the IMC PZT were moved back into alignment based on top-mass OSEMs from when the IMC was last locked, and once the light pipe was reopened, the IMC locked without issue. Input power was brought up to 10W at the HAM7 team's request. Scattered light work in HAM7 will continue tomorrow, but for tonight we've shut the PSL light pipe and lowered input power back down to 1W since chambers are open.
LOG:

[Betsy, Masayuki]

Assembly drawing: https://dcc.ligo.org/DocDB/0126/D1600270/006/D1600270-v6.PDF (Type-10)
    •    A #8 flat washer was installed between the body and the beam-blocking hole cover.
    •    Six strain relief PEEK blocks (D1700101) were installed.
    •    A heater cable (D2500337) was plugged into one of the heaters. The other heater is not yet connected, as we decided to complete the wiring after confirming its polarization.
    •    The JAC body assembly was weighed. Including these parts, the total weight was 17,781 g. This measurement includes the end covers (D1700031) with a total of four screws (two per cover). The end covers need to be weighed separately and subtracted to determine the actual body weight. (the weight will be summarized in the weight tab of the component list)
    •    Note that the screws used to fix the strain relief are not vented screws. These will need to be replaced once the correct vented screws are received.

BBSS Inspection Fixture (D2200364) parts were fit-checked and helicoiled. Since we need the actual container for the full assembly, I tried to assemble everything but that which was:

1. Inspection Ring Assembly - ~100 "feet" (D2400031) were helicoiled, 12 of which were attached successfully to the inspection rings (which also were helicoiled)

2. The locating shaft (D1000347) and sleeve (D1000346) were fit-checked with the set screw and helicoiled. The 3/8-16 screws that go into the helicoils are too tight for some to go in so I left the tangs in until I can investigate either. This is the only weird thing I encountered.

3. Wing nuts and other holes were fit-checked and fit well and easy.

See pictures attached.

[Jason, Betsy, Masayuki]

Two arises are installed into HAM1 chamber. They will be used as the alignment reference for new PSL modematching lens installation.

• Assembled a Thorlabs ID12 iris mounted on a 0.5-inch post with a post holder and BA2 base.
• The assembled iris was temporarily placed inside the chamber and secured with a dog clamp.
• Transitioned to laser hazard.
• Performed rough alignment using a sensor card, followed by fine alignment with an IR viewer, to center the beam through the iris.
• The beam path is offset by ~+5 mm in the +y direction from the ISI design center; this is not considered a significant issue.
• The iris location is marked with a blue circle in the attached figure.

Next step: move to the PSL and install the new mode-matching lens, likely tomorrow. This will break the IMC mode matching; IMC relocking will not be possible until the JAC installation is completed.

We started installing electronics chassis for JAC:

• Heater driver, S2500960.
• DB9 breakout panel, S2500958.
• PZT driver, S2500954.
• RF doubler: S2500737.
• RF amp: S1000637 (was already installed).
• Two sat amps for JM1 and JM3, S1106042 and S2500411.

Still missing:

• Two 4-chn WFS demod chassis.
• Two AA chassis.
• JAC in-vacuum electronics interface chassis.

The necessary coax cables were also installed and terminated where possible.