Oli, Camilla.

Following work done in 84115 to repopulate HAM1 with some optical components, today Oli and I placed the SLED in position and placed all the diodes, most (not LSC POP A ) are cabled. Photos taken from -Y side and +Y side attached.

Apart from LSC POP A, they are all cabled up according to the cables in D1000313 BOM googlesheet. LSC POP A has a heli-coil that needs replacing before we can install the RF cable so neither cable are currently installed. ASC REFL A and B are in the incorrect position to allow for beam profiling before moving the the final position. LSC REFL A and B may need to be moved slightly but we need more of the correct size dog clamps to allow that. 

FAMIS 31083

Short list of PSL-related events over the past week are as follows:

• Picomotor driver change (in enclosure): alog84045
• PMC/RefCav alignment: alog84063
• Model restarts of h1pslpmc and h1pslfss (resetting lock counts): alog84044
• AMP1 pump diode current increase: alog84081

Aside from these events, no other major changes of note.

Input Arm alignment pointing for the HAM2 an HAM3 suspensions was re-checked after corner pumpdown. Since HEPI is locked currently, we wanted a time pre-venting where HEPI is also locked in order to be able to compare. I used the pointing values which follow the format: H1:SUS-{suspension}_M1_DAMP_{P or Y}_INMON.

HAM HEPIs LOCKED and CORNER (except HAM1) UNDER VACUUM - GPS TIME: 1427710424

Most of these are very close and do not need to be adjusted, with only 2 being different by over 100 microradians. 45% of values have less than 10urad discrepancy. 85% have less than 50urad discrepancy. After speaking with TJ, I realigned two most egregious ones IM4 Y, and IM2 P to their pre-vent (HEPI Locked) values using the OPTICALIGN sliders. Screenshots below of plots used further show the pointing as well as the old to new value differences of the two suspensions that were aligned. After alignment, all values are under 100urad discrepancy and 95% are under 50urad difference.

Jonathan, Dave:

The DAQ detail MEDM has been updated to show FW2's progress within the 64 second cycle for full frames, 600 second cycle for second trends and 3600 second cycle for minute frames.

When each progress bar reaches the end, the next data accumulation phase starts and the frame file writing begins.

A new run_number column has been added, along with a LED stack checking these all agree with each other.

The retransmission column has been removed.

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

Dew point measurement at HAM1 , approx. -42C

h1daqfw2 is now producing identical raw, second trend, and minute trend frames to h1daqfw[01].  The issues mentioned in https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=84132 have been resolved.

There are times where we expect there to be mismatches.  These are generally when data is missing, the daqd may replay recent data, where the new frame writer will write zeros.

We will continue tests on the frame writer, including software updates.  The next test is to watch the behavior of h1daqfw2 when h1daqfw0 & h1daqfw1 have a restart.  It is designed to automatically adjust its channel list and have no gaps in the frames and need no restart to accommodate the changes.

Randy, Mitchell, Tyler, TJ, Betsy, Oli, Camilla. WP#12444, WP#12496, moved away from HAM2 in 83686.

We attempted to move IOT2L back into place on Friday but the cleanroom had been moved into the way of the final table position for ISI work and one of the casters of the table was stripping rubber off one side and kept rubbing so we paused.

This morning the cleanroom was moved out of the way (+X by ~1-2 feet) and then Randy finished moving IOT2L into place with the help of the forklift. Once IOT2L's corners were over the markings made in 83296 and the height was correct, we re-attached the bellows, removed the guillotines and replaced the guillotine slot covers. Photos attached. The HAM2 VP furthest to -Y never had a guillotine slot cover, so one was added. 

Mon Apr 28 10:08:46 2025 INFO: Fill completed in 8min 42secs

Closes FAMIS 26454. Last checked in alog 83629.

No trends above or blow thresholds.

TITLE: 04/28 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: 8mph Gusts, 6mph 3min avg
    Primary useism: 0.01 μm/s
    Secondary useism: 0.11 μm/s
QUICK SUMMARY:

IFO is in PLANNED ENGINEERING for the vent

Planned activities today:

• HAM1 - ISC instal
• HEPI upgrade software part install
• PCAL at Ends
• HAM1 cable work contd. (contd.)
• HAM1 RM finish SUS troubleshooting
• EY Wind Fence work
• HAM1 Top flange guage
• HAM4/5 tray work (crane)
• IOT2L - roll up and set in location when needed

Sun Apr 27 10:08:59 2025 INFO: Fill completed in 8min 55secs

We had a slight power glitch which was reported by the GC OSB UPS (but not CDS MSR UPS).

Attached trend shows this was seen by h1pemcs in the CER.

Sat Apr 26 10:08:27 2025 INFO: Fill completed in 8min 24secs

Following the SWWD trip of HAM1 earlier this week I realized I had not added HAM1's SWWD to the CDS overview watchdog section. I took this opportunity to also improve this section. New features are:

• Clicking anywhere in the HWWD or SWWD areas opens the corresponding overview screen, no longer restricted to clicking within the blue button.
• HWWD BSC circles only go red when the countdown timer is below 19 minutes, prevents the red flicker we were seeing on false positives.
• SWWD chambers show both SUS status (circle) and SEI status (square).
• Expanded SWWD status from two (OK=GREY, NOT_OK=RED) to four (OK=GREY, BYPASS=YELLOW, COUNTDOWN=PURPLE, TRIPPED=RED).

As before the SWWD section shows the HAMs on the left in approximate relative locations for HAM1-HAM8 and the BSCs on the right.

This ADL file is now generated by the python code /opt/rtcds/userapps/release/cds/h1/scripts/generate_watchdog_medm.py

The attachment shows the current situation with all of HAM1 bypassed.

TITLE: 04/25 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Planned Engineering
INCOMING OPERATOR: None
SHIFT SUMMARY: The HAM1 work continued today, the RMs are back in.
LOG:                                                                                                                                                   

• HAM1 - Install RMs, cable up DONE
• HAM1 RM1 troubleshooting ground DONE?
  • alog84128
• HAM1 -Start install of ISC components, start with some diodes and cabling, ground loops, signal chain troubleshooting Ongoing
  • alog84123
  • alog84133
• IOT2L - Roll up and set in location when needed Ongoing
• HEPI upgrade software part start ?
• PCAL work at both stations ?
• EY - Wind fence work starts gearing up - equipment moves ?

Jonathan, Dave:

Jonathan has his new h1daqfw2 frame writer running and writing byte identical frame files compared to production. I have extended the DAQ DETAIL MEDM to perform a check between all three frame writers, warning if their frames differ in size or content.

The attached MEDM shows all three frame writers with identical full and second trend frame files, but with FW2 having written a different minute trend file. This is because FW2 was started during the past hour and therefore wrote an incomplete file.

FW2 is currently not in production, which is shown by its error/warnings being indicated in YELLOW instead of RED.

Oli, Daniel, Fil, Betsy, Rahul

We have re-installed SUS RM1 and RM2 Tip Tilt suspensions into HAM1 chamber which has the new ISI table - see several pictures attached below. RM1 is on the left (towards PSL side) hand side of this picture and RM2 is on the right (zoomed in). Both the suspensions are positioned roughly as per D1000313_V19, and will be fine tuned (pitch and yaw of the mirror as well) during beam alignment work. The blade springs of both the suspensions have been un-muted - see LHO alog 83984 for details.

Both RM1 and RM2 have been plugged-in to their electronics chain. We had to perform some troubleshooting with RM1 after observing grounding issues. At first Fil and Daniel ruled out any issues with the satellite box and in-air cables. After some investigation, the grounding issue was suspected to be coming from the in-vacuum quadrupus cable (connecting to the Bosem), which is an old cable and looks worn out too.

This morning I replaced the old Bosem cable (D1000228_v3 s/n S1105240) with a 25in long (D2100049 S/N 2200358) cable. Before connecting it to the Bosem, Daniel and I verified that the cable is fine (i.e not grounding) and later on we connected each pin (Bosem) one by one. We had to re-adjust the Kapton tape (installed for additional shielding) since the cable bosem connector was grounding to the chamber. After all these modifications, we can confirm that RM1 and RM2 are free from any grounding issues for now. We will check again before closing the chamber.

Next, I will start taking measurements on these suspensions and will post their health report soon.

WP12488 HAM8 ISI binary readback broken following site outage FRS33798

Fil, Erik, Jim, Dave:

Yesterday we power cycled the binary input/output and interface chassis, which did not fix the issue. Today we stopped all the models on h1cdsh8, powered down the computer, then power cycled the IO Chassis.

This also did not fix the problem. Investigation continues.

Oli, Matt, Camilla