S. Muusse, G. Valente

Electronics integration

We are running into some issue with the linear translation stage and rotation stages which we can't operate through the medm. Both stages are operational when using a newport motor driver and when driven through directly through beckhoff into the CHETA chassis and motor driver chassis but havent been shown to work with the code taken from the CO2 rotation stages. Patrick has been looking through the software but we are yet to find the solution. Yesterday (02/26) we determined the motor power cables from the CHETA chassis to the motor driver chassis were crossed which was a possible source of this issue, however, this was consistent with the wiring in the motor driver chassis albeit unorthodox. We elected to modify the cables so they are wired conventionally and in turn changed the wiring in the motor driver chassis by switching the + and - wires at the back of the chassis where the power is outputted. Now internally  the black = positive and red = Negative which is unfortunate but the best solution. We have seen both stages work after this effort using the newport motor driver so we dont believe this is the issue. 

Setting up Table 2

Table 2 is in the process of being populated. Today we installed the PD system using the electronics to align the PDs and also have inserted the first telescope lens. Initially, when installing and aligning the PDs the PD power supply chassis was supplied with pos =+24 and gnd =0V instead of ±18V leading to both PDs outputing -11V. This fried the first transimpedence amp in the circuit board which we have now replaced with alot of help from Marc. Both PDs are now working and aligned on the table. 

Calibration and power budget on table 1

We measured the power after all optics, where the powermeter fit ,as well as the I[A]/P[W] relationship of the laser to calibrate laser power on the MEDM.
The min/max power that can be achieved using the waveplate in rotation stage and the 2 polariser was measured:
Min ≈20mW ,
Max = 1.44W 
Both powers were measured after the 2nd polariser. This corresponds to a maximum power which can be output off the table of 1.308W, which was measured after the last pickoff. 
I'll attach plots/ figures in the comments showing these measurements.

As part of WP 13002 we migrated more services from the old VM cluster to the new one.  The most visible one was migration of the dust monitor and weather station IOCs.

We waited to do this migration until the doors were back on to make sure the dust monitors did not disappear while they were needed.

We have one more VM to migrate, we will do that on Monday and then de-commission the old VM cluster and supporting file servers.

TITLE: 02/28 Day Shift: 1530-0030 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Planned Engineering
INCOMING OPERATOR: N/A
SHIFT SUMMARY: Both doors and all viewports are now in place on HAM1 and the annulus is pumping down. Next week, after the main volume is at low enough pressure, we'll start commissioning the new JAC in with the rest of the IFO.
LOG:

Richard, Marc, Jonathan, Erik, Dave:

On Monday 23rd the CHETA slow controls chassis was installed in the Vacuum Prep Lab (VPL). We connected its ECAT ethernet port to the MSR Beckhoff chassis AUX-1 port partially by copper (VPL to Rm163 into CUR) and partially by fibre (CUR CDS edge switch to MSR edge switch).

This appeared to work, but later we found out that the CDS core switch was complaining constantly of rapid movement of a MAC address on the ports used by CHETA. Further reading suggests ECAT does not strictly support unique MAC addresses per Beckhoff terminal, and it appears they may all have the same non-standard MAC address.

In addition, since Monday we have been seeing regular dropouts of the CUR network switch stacks, every 6 hours at 00:41, 06:41, 12:41 and 18:41 for about a minute apiece.

This afternoon we ran a long 148' cat5e ethernet cable from room 163 to the far end of the MSR. At 16:01 we routed the CHETA chassis connection to use this cable, we now have contiguous copper run between the two chassis.

This will fix the MAC movement issues on the CDS core, and time will tell if if fixes the CUR switch dropout.

JAC PZT: H1:JAC-PZT_DRIVER_OFFSET was set to zero, PZT scan was disabled, and the high voltage power supply for JAC PZT driver between the PSL room and the ISC R4 was turned off.

JAC Heater: H1:JAC-HEATER_POWER_SET was set to zero (used to be 1) and the heater driver chassis (ISC R4 slot 23) was turned off. 

HAM1 picos: HAM1+HAM3 picomotor controller was disabled via medm screen.

FAMIS 39753

Laser Status:
    NPRO output power is 1.845W
    AMP1 output power is 70.51W
    AMP2 output power is 138.5W
    NPRO watchdog is GREEN
    AMP1 watchdog is GREEN
    AMP2 watchdog is GREEN
    PDWD watchdog is GREEN

PMC:
    It has been locked 2 days, 4 hr 16 minutes
    Reflected power = 27.05W
    Transmitted power = 103.9W
    PowerSum = 131.0W

FSS:
    It has been locked for 0 days 4 hr and 23 min
    TPD[V] = 0.4902V

ISS:
    The diffracted power is around 3.7%
    Last saturation event was 2 days 4 hours and 23 minutes ago

Possible Issues:
    PMC reflected power is high

The HAM1 +Y door was installed today.  Installation went smoothly and the O-ring cooperated by staying in place today.  I will note that torquing the door bolts is becoming more of an issue due to wrench access being increasingly limited near the 5-way cross/feedthru areas now that all the in-air cables have been attached.

The HAM1/HAM2 annulus system is being pumped by 2 turbos/aux carts on the -Y side of the chambers.  The mysterious ~order-of-magnitude pressure readout difference at the two carts on the shared annulus system is again present, as was noted the last time this annulus system was pumped down.  Not an issue per se, just some vacuum phenomena that leaves us scratching our heads. 

The CDS_CA_COPY Guardian had not been running for roughly the past month due to three disconnected channels reported by SPM (H1:VID-FC_TRANS_A_{X,Y,SUM}). These channels went dead on January 27th when the new VM cluster was installed (alog88919) because they had been running on a dummy IOC called "cam_fc_trans_a_dummy_ioc" (created in March 2024, see alog76146) that must not have been brought over to the new VM cluster. Dave and I decided that since these channels have all been reporting zeroes for almost three years, possibly because that camera is not working, we would simply comment out these channels from the cds_ca_copy_list.txt file so they aren't referenced. After doing that and restarting the Guardian code, the node is working properly again.

Jennie W

I updated the medm for the IMC WFS to remove the feedback references to the PSL PZT. This feedback path had been removed from the model this morning (thanks Dave for the rev-locked build of h1ascimc and the DAQ restart). The WFS screen output matrices have been updated to put back the fifth DOF and removed the path to the PZT. We never control this fifth degree of freedom but it is still in the simulin model so we should leave it in. The second picture shows the output matrix screens which no longer contain the PZT feedback column.

Fri Feb 27 10:09:01 2026 INFO: Fill completed in 8min 58secs

Closes FAMIS#39856, last checked 89201

Corner Station Fans (attachment1)
- All fans are looking normal and within range.

Outbuilding Fans (attachment2)
- All fans are looking normal and are within range.

Jennie, Keita, Ryan S, EJ, Dave:

Jennie and Keita did a clean up of the h1ascimc model which was installed this morning. A DAQ restart was required, 14 slow channels had been removed.

As we had seen previously, restarting h1ascimc still causes DAC errors on h1iopasc0, and the safest way to restart h1ascimc is part of a full model restart on h1asc0.

Ryan confirmed a good SDF status and all the models were restarted (h1iopasc0, h1asc, h1ascimc, h1ascsqzifo).

The DAQ was then restarted, no issues other than GDS1 needing a second restart.

Closes FAMIS#38814, last checked 88932

BRS Driftmon
Auxiliary BRS Channels

Everything looking normal

TITLE: 02/27 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: 4mph Gusts, 2mph 3min avg
    Primary useism: 0.02 μm/s
    Secondary useism: 0.23 μm/s 
QUICK SUMMARY: One door and a viewport remain to be installed on HAM1.

Jordan and Camilla pulled the FirstContact from the JAC viewport in prep to install it on the -Y door.  Unfortunately the inner glass surface was still showing many dots of particulate so we decided to re-FirstContact clean it.  I poured on a new sheet and we are now letting it dry overnight.  Install will need to happen tomorrow after we pull the sheet and hopefully have better results.  This seems to be typical of FirstContact these days - needing to reapply a second time on numerous optics...

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

Wednesday afternoon we had the opportunity to remove and replace the annulus ion pump body for BSC8 annulus system.  To reach the ion pump body we used the scissor lift that Randy moved near the chamber.
No issues were encountered on the removal or installation of the ion pump body.  The annulus ion pump system was evacuated and we left it pumping down with an aux cart and a small "can" turbo.  On this system we used a noble diode pump, which required us to replace the controller for a positive one.  Setpoints were set on the aux cart and at the end of the day the annulus system had reached below 5.0x10^-05 Torr.

Picket Fence earthquake early warning system can't connect to station "UO_TOOM:HHZ", so we're only monitoring on four out of five stations.

Now that HAM7 is at sufficient pressure (6.4E-7 Torr as of this post) we helium leak checked the two re-installed 12" CF blanks removed for table locking and the entire relay tube assembly which had been removed for the viewport adapter on HAM5.

The Helium background was unstable, so we turned on the HAM7 cleanroom (on 2/18 afternoon) to help flush the area of helium overnight.

Today the background stabilized around 1.5E-10 Torr-l/s, so we were able to continue leak checking. No significant helium signal observed above the leak detector background which hovered between 1.5&2E-10 Torr-l/s during leak checking. 

HAM7 continues to pump down with the turbopump, next steps are chamber RGA scans.