Closes FAMIS#28228, last checked 88988

TCSX: 30.5 - Did not add water

TCSY: 10.4 - Did not add water

Flow and filters looked good, but had to remove a notification about preventative maintenance for the filter for both chillers (TCSX, TCSY) in order to see the flow rates. 

No leak in water cup

Workstations were updated and rebooted.  This was an OS packages update.  Conda packages were not updated.

Tue Feb 17 10:13:47 2026 INFO: Fill completed in 13min 43secs

FAMIS 31125

Since the FSS and ISS were re-enabled last week, things have generally been stable in the PSL. The RefCav could probably use some alignment touchup, but it's not too bad for now.

FAMIS 39751

Laser Status:
    NPRO output power is 1.834W
    AMP1 output power is 70.51W
    AMP2 output power is 138.8W
    NPRO watchdog is GREEN
    AMP1 watchdog is GREEN
    AMP2 watchdog is GREEN
    PDWD watchdog is GREEN

PMC:
    It has been locked 3 days, 19 hr 53 minutes
    Reflected power = 26.72W
    Transmitted power = 103.9W
    PowerSum = 130.6W

FSS:
    It has been locked for 3 days 15 hr and 53 min
    TPD[V] = 0.4774V

ISS:
    The diffracted power is around 4.0%
    Last saturation event was 3 days 19 hours and 53 minutes ago

Possible Issues:
    PMC reflected power is high

TITLE: 02/17 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: 8mph Gusts, 5mph 3min avg
    Primary useism: 0.03 μm/s
    Secondary useism: 0.39 μm/s 
QUICK SUMMARY: The HAM1 JAC EOM will have some slight alignment adjustments made today before placing the JM1/3 suspensions in their proper positions. HAM7 continues to pump down.

Mon Feb 16 10:13:39 2026 INFO: Fill completed in 13min 36secs

Sun Feb 15 10:13:40 2026 INFO: Fill completed in 13min 36secs

Sat Feb 14 10:14:53 2026 INFO: Fill completed in 14min 49secs

FW0 spontaneously restarted itself at 17:49 Friday 13th February 2026.

The DAQ was last restarted 16:05 Thursday 12th February, and FW0 had been running 1day 1hour 44minutes at the time it restarted. There have been no further restarts.

TITLE: 02/14 Day Shift: 1530-0030 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Planned Engineering
INCOMING OPERATOR: None
SHIFT SUMMARY: Productive day with the HAM1 EOM being adjusted to recover IMC alignment, which locked easily and has a good REFL demod phase. Sounds like the EOM needs to be moved again slightly next week, but that's been prepped for this afternoon. A few AUX carts were disconnected in the LVEA as well today.
LOG:

(Travis S., Jordan V., Gerardo M.)

Late entry-

Late Wednesday we vented the annulus system for HAM4 using nitrogen.  On Thursday, we removed and replaced the ion pump, a very uncomfortable location for this pump, it is surrounded by cable trays, see photos.

We have not been able to fasten the mounting bolts that hold the ion pump body in place, we have noticed that the pipes for the annulus system leading up to the mounting flange are not parallel to the ion pump flange they are |/ and they should be ||.  So, we have to twist the pipe to be able get it parallel to the pump.  We have a mechanical block supporting the pump as a temporary support, we'll replace it as soon as possible.

T. Sanchez, J. Oberling

This afternoon we took a look at the JAC Refl path and positioning of IOT1.  We ended up pushing IOT1 in the +X direction by ~1"; new marks were made on the floor to represent this position.

From here we used JACR-M1 and JACR-M2 to align the beam through the viewport simulator and onto the top periscope mirror of IOT1.  This only took a couple of iterations before things looked mostly OK.  The beam is currently a little low in the viewport simulator, maybe 0.5" to 1" (rough measurement by eye) and is hitting the top periscope mirror.  We finished by measuring the beam height at 2 places on the ISI table roughly 28" apart, to give us an idea of how the beam is pitched.

• Point 1: 109.0 mm
• Point 2: 108.25 mm
• Pitch: ~1.05 mrad down

This seems OK for now, but on some reflection while sitting in my office typing this alog we may want to briefly revisit this.  The beam is slightly pitched down and is high on JACR-M2 (~0.5" on a 2" diameter optic), so I think there is some room to improve this, to get the beam closer to center on JACR-M2 while still passing through the viewport simulator and onto the top periscope mirror of IOT1.  More to come.

I checked the IMC REFL demod phase. Locking the IMC was very easy- with 100 mW coming from the PSL, I selected "locked" on the guardian and it locked right away, good work from the team in alog 89106!

I injected a 400 ct line into IMC L at 50 Hz, following similar steps done by the JAC crew here.

I only saw the line in I phase, so I tried taking a no injection reference and also bumping up the injection to 800 ct to see if there is signal in Q phase. There is no visible signal in Q phase. Therefore, I declare that the IMC refl demod phase is just fine at 20.87 deg.

The attached plot shows the injection time in the red and blue live traces in I and Q, and the no injection reference time in pink and blue.

I ran another excitation at 10000 ct to generate the second plot attached.

Richard asked for a one-day trend of the dust monitor at BSC2 since he moved it from the floor up to the dome platform (alog89137); see attached. Heightened counts from today likely from cable pulling activities around/on top of HAM3 nearby.

Morning report.

Pictured the beam position on the input and the output side plate of the EOM.

We'll see if it's off or not, doesn't look bad but we'll see once I have time to look at the pictures.

We realigned the beam into IMC, mode mismatch < 0.4%.

I just assumed that the MC alignment itself was good. I found MC2 in misaligned state and changed it to aligned.

We had to work both on PIT and YAW, but mostly in PIT (i.e. the difference in horizontal beam deflection between the old batch crystal that we're using and the new batch crystal is smaller than the difference in vertical deflection). 

Good news is that the mode matching is still pretty good. Attached is the MC2 trans VS time while the PSL frequency was ramped. Assuming that the tiny thing pointed by the green arrow is actually 2nd order HOM peak, the mismatch is 0.036/9.4~0.4%. Consider this as an upper limit, because it's hard to tell if the "peak" is actually a peak, could be noise fluctuation.

(Jordan V., Travis S., Gerardo M.)

Pumpdown was restarted this morning around 9:11 am local time.  After pressure inside HAM7 reached 0.5 Torr we switched over to the turbo, we had a very smooth transition.  After the internal pressure of HAM7 reached 5.0x10^-05 Torr all O-ring isolation valves were closed (we have one at the turbo pump, another at the chamber and one more at the relay tube).
HAM7 internal pressure after 12+ hours of pumping is 5.2x10^-06 Torr.  The attached plot has a small glitch at the 10 hour mark, likely due to the DAQ restart.

Annulus ion pump update.  The ion pump controller was turned on this morning, the ion pump controller struggled for some time as it was railed, but we did noticed that the pressure reading reported by the aux-cart (aux-cart remains connected and pumping on this system) dropped very slow, but after a some minutes the ion pump controller was not railed no more.

(Jordan V., Gerardo M.)

-Late entry

On Friday we removed and replaced the ion pump for HAM3.  We replaced the copper gasket twice, the first gasket seal had a bad leak, it was hard to see the mating surfaces due to visibility issues (laser safety goggles and not enough light).
After installing a second gasket, we started pumping down the annulus system and pressure went down fast.  Last pressure reading at the aux-cart was 4.63x10^-05 Torr.
BTW, we have other 4 (four) ion pumps to replace.