In preparation for the new HAM1 ISI and the new PM1 suspension, I've created and started 3 SEI Guardian nodes - ISI_HAM1, SEI_HAM1, ISI_HAM1_BLND. I've also created and started SUS_PM1. These have been added to the Guardian overview screen, and a DAQ restart is immanent. Total node count is now 173.

While prepping the code for the other SEI nodes I noticed that ISI_HAM3 was the only ISI node that was still on common code. The H1 specific versions of the other nodes will redefine a few of the dofs that get paths turned on and off. I spoke with Jim and we decided to bring HAM3 in line with the rest and made a copy of H1 HAM2. Needed to restart this node to pick up the changes since it's a SEI node.

TJ, Sheila, Matt, Andrew (job shadow today), Camilla. WP12433. Table layout D1400241.

Following on from other beam profile work at the end stations 81358, Madi Simmonds models G2500646 and the ideas we had for understanding ETM mode matching better (googledoc), today we took some beam profiles of the EY ALS beam reflected of ETM HR in the HWS path.

We added a 532nm quarter waveplate downstream of the beamspiltter (ALS-M11) and tuned it to maximize the light reflected into the HWS path. This was removed when we were finished and left with Nanoscan beam profile.

We first took some beam profile measurements (photos 1-4) first with the QPD offsets on nominally, and then with the offsets zero'ed (phots 5-9). Unless the beam has been pico-ed (which it may have) the zero offsets should have the beam more centered on the Transmon parabolic mirrors. The beam changed when the offsets were turned off but did not look better/worse, just different. Compare photo 4 (QPD offsets on) and photo 5 (offsets off).

I double checked the positions of PR3 and SR3 before the DAQ restart that's planned for today, SR3 seems to have done a bit of drifting from the LVEA zone4 temperature increasing by ~ 2 degrees. The T cursers denote the power outage. PR3s YAW oplev looks a little different post power outage but its' top mass osems don't really seem to have moved.

Mon Apr 14 10:08:47 2025 INFO: Fill completed in 8min 44secs

FAMIS 31081 (this also serves as a checkup on the PSL following the large power outage early last week)

Generally things are behaving as expected with just a few exceptions. Most notably, both amplifier output powers are ~1W lower than before the outage, likely due to the current being lower on the pump diodes in AMP1 by ~0.1A each. We had set the currents for AMP1 (power supplies 1 and 2) back to pre-outage levels of 8.7A, but perhaps due to rounding issues coming out of Beckhoff (?) the actual current is apparently lower. We may bump these up by another tenth of an amp to see if this brings the output power back up.

PMC transmitted power is lower by ~1W (and noisier), either due to the lower power out of the amplifiers or the misalignment I can clearly see on the PMC REFL camera. I'll plan to try and touch that up, along with RefCav alignment, before the work in the enclosure for the installation of the SPI pickoff starts tomorrow.  Edit: I forgot that the picomotor driver for the PSL is shared with IOT2L and lives on that table which is fully disconnected for vent work.

Morning dry air skid checks, water pump, kobelco, drying towers all nominal.

Dew point measurement at YBM , approx. -44C

Closes FAMIS26372, last checked in alog83723.

Nothing of note on the scopes, everything looks like it did during the last check.

There were some earthquakes overnight, they bled into multiple bandwidths. There was a smaller local and a larger pacific EQ within 15 minutes of each other, a 6.5 near Fiji and a 2.5 from northern Washington about ~19 hours ago.

TITLE: 04/14 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Planned Engineering
OUTGOING OPERATOR: None
CURRENT ENVIRONMENT:
    SEI_ENV state: MAINTENANCE
    Wind: 1mph Gusts, 0mph 3min avg
    Primary useism: 0.02 μm/s
    Secondary useism: 0.13 μm/s
QUICK SUMMARY:

The vent continues, on the Trello for today is:

• Guardian Work, DAQ restart - TJ
• HAM1 - Install ISI tooling
• HAM1 ISC prep - check all removed cables for loose screws, continued
• HAM1 ISC prep - Inspect Optics and beam dumps, FC if needed, continued
• HAM1 ISC prep - Recheck all RMs with FRS ticket issues, continued
• VAC - Start Feedthru Swap, need Betsy for some cables, continued, mostly done except 1-2 small ones
• PSL/FIL - Moving picomotor driver, pull cables
• EX and EY - ALS work beam profiling

Sun Apr 13 10:08:59 2025 INFO: Fill completed in 8min 56secs

Sat Apr 12 10:09:32 2025 INFO: Fill completed in 9min 29secs

Elenna, Matt, Camilla. Continuing ISC component inspection and prep for re-installation from 83858. 

Elenna, Matt and I continued to first contact the optics in pans 1 and 2:  M7, M11, M12 (new 90/10 BS), M13, M15 (New 50/50 BS), M16, M17, M18. After again inspecting some of those we cleaned yesterday, we decided to re-clean some. Some needed multiple first contacting, they aren't all perfect (there is a 1" long incredibly hard to see line on M15 and a mark in the center of M18 photo that I will ask a second option on), but otherwise we are calling these two pans of optics ready for re-installation. 

For M15, I installed the picomotors that I removed from the right handed mount into a left handed siskiyou mount. I installed the manually adjustable actuators removed from the left handed mount into the right handed mount, this will be stored. Notes on how to do this are attached.

Still to be done: decide if M15 and M18 are okay or need swapping, clean optics in pan 3; inspect periscope mirrors; swap out any glass beamdumps we can. 

TITLE: 04/11 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Planned Engineering
INCOMING OPERATOR: None
SHIFT SUMMARY: BSC8 work finished up and doors were put back on, HAM1 work continues, the ISI is all packed up and ready to move over to its new home.
LOG:

• BSC8 - ITMY and R0 TFs after alignment complete DONE alog83876
• HAM1 ISC prep - check all removed cables for loose screws DONE
• HAM1 ISC prep - Inspect Optics and beam dumps, FC if needed Ongoing
• HAM1 ISC - rework M12 and M15 DONE
• HAM1 ISC prep - Recheck all RMs with FRS ticket issues DONE?
• JASON - IAS HAM1 support tube ends?
• BSC8 - Prep for Closeout DONE
• BSC8 - DOOR ON DONE
• HAM1 - Prep for ISI install DONE alog83879
• VAC Start Feedthru Swap Ongoing?

Travis, Betsy, Randy, Jordan

- BSC8 -X door re-installed with one round of bolt torquing (will perform another round Monday), purge air increased prior to door install, then purge valve at YBM closed. Corner volume has slight overpressure and will be blown down to atm. prior to pumpdown

- Continued installation of HAM1 electrical feedthrus

- Scroll pump staged for CP1 RGA pumpdown and bake-out

J. Kissel

Figured I'd make the same in-air vs. in-vac comparison of the whole 6 x 6 transfer function matrix for H1 SUS PR3 like I did for SR3 in LHO:83831.


                 D R I V E   D O F 
          L     T     V     R     P     Y

     L    --    meh   meh   meh   eand  YI
 
R    T    meh    --   nd    eand  meh   meh
E 
S    V    YI    YI    --    nd    meh   nd
P
     R    meh   eand  YI    --    YI    meh
D 
O    P    eand  YI    YI    YI    --    nd
F
     Y    YI    nd    nd    nd    nd    --

Recall the legend is 
  YI = Yes, Interesting. DC response magnitude is a bit different between vac and air, but not by much and all the resonances show up at roughly the same magnitude.
 meh = The resonant structure is different in magnitude, but probably just a difference in measurement coherence
eand = The cross coupling is expected, and not different between air and vac.
  nd = Not Different (and unmodeled). The cross-coupling is there, but it doesn't change from air to vac.

(1) For some reason, the data quality on the upper diagonal is worse for the PR3 in-air TFs vs. SR3's but better on the lower diagonal. The "mehs" in PR3's cases are more "man, I wish the coherence was better so we could make a better statement."
(2) For the most part, the same DOFs that are "Yes, Interesting" for PR3 are "Yes, Interesting" for SR3.

Needs a more careful study, but we're only looking at crappy in-air vs. good in-vac data because we're vented right now, and we want to see if it's sensible to measure these things in air, fit the data, and trust that that fit will work in vacuum. 
Given that we're seeing *any* of these elements as "Yes, Interesting -- there's a difference between in-air and in-vac" means that we're getting scared away from do that -- the problem is hard enough! We'll probably just end up waiting for the SUS to be back at vacuum in a few weeks.

Visually the ETMY HWWD looks nominal, all power LEDs are green. To test I unplugged the top monitor connector and after a few seconds the LED-FAULT red led lit up. After 8 seconds I plugged the monitor connector back in which cleared the LED-FAULT light.

Attached trend shows the HWWD STAT go to 8 (led current fault) and the countdown timer started counting down from 20 minutes (seconds channel shown).

It appears there is no problem with the HWWD unit itself, and the change in behavior since the power outage must be related to something upstream (satellite amps). I'll pass this onto Fil for further testing.

At this point I'm not sure if the ETMY hardware watchdog system is fully functional, but bear in mind this is a secondary watchdog to the IOP SWWD.

Today's activities:

• HAM1 feedthrus were installed according to D1002872-v10.  D6 is completely populated.  D1 was populated with everything except the feedthrus on the 5-way cross.  Those will be added in the next days.  The 3-port adapter (currently on D4 but destined for D3) has completed 1 of 2 feedthru swaps.  
• CP1 RGA is being revisited.

[Betsy, Keita, Camilla, Richard M., Elenna]

After the power outage, we wanted to get some confirmation of PZT pointing out of the PSL. Betsy, Keita and Camilla went in the cleanroom with the IR viewer and indicator cards and took the covers off the IMC refl and trans viewports on HAM2. Keita found the beam out of the IMC REFL viewport, and I adjusted the IMC PZT in pitch and yaw under direction from Keita. I accidentally moved the pitch slider a bit at the beginning due to user error. Then, we took large steps of 1000 or 2000 counts to move the offsets in pitch and yaw.

Start values: pitch: 22721, yaw: 5488

End values: pitch: 21192, yaw: 6488

Then, Betsy found the beam out of the IMC TRANS viewport and Richard marked the beam spot approximately on the outside of the cleanroom curtain with a red sharpie. This is super rough but gives us a general location of the beam. We think this is a good enough pointing recovery to proceed with vent activities.