Famis 39976 Inspect quarterly trends of HWWD bits for indication of negative function. 

All traces have had some motion on it in the last 91 days.

Yesterday afternoon I glued prisms to the LO2 optic for HRTS - see pictures attached.

This optic (D2100495-V5-LO2-M1-0002) will be shipped to LLO.

Famis 38888 SEI seismometer mass position check - Monthly :

Checking T240
Checking STS
Finished
Averaging Mass Centering channels for 10 [sec] ...
2026-02-20 11:36:02.279522

There are 12 T240 proof masses out of range ( > 0.3 [V] )!
ETMX T240 2 DOF X/U = -1.716 [V]
ETMX T240 2 DOF Y/V = -1.819 [V]
ETMX T240 2 DOF Z/W = -0.998 [V]
ITMX T240 1 DOF X/U = -2.377 [V]
ITMX T240 1 DOF Z/W = 0.459 [V]
ITMX T240 3 DOF X/U = -2.547 [V]
ITMY T240 3 DOF X/U = -1.089 [V]
ITMY T240 3 DOF Z/W = -3.077 [V]
BS T240 2 DOF Z/W = 0.346 [V]
BS T240 3 DOF X/U = -0.518 [V]
HAM8 1 DOF Y/V = -0.428 [V]
HAM8 1 DOF Z/W = -0.728 [V]

All other proof masses are within range ( < 0.3 [V] ):
ETMX T240 1 DOF X/U = -0.006 [V]
ETMX T240 1 DOF Y/V = -0.037 [V]
ETMX T240 1 DOF Z/W = -0.03 [V]
ETMX T240 3 DOF X/U = -0.024 [V]
ETMX T240 3 DOF Y/V = -0.07 [V]
ETMX T240 3 DOF Z/W = -0.043 [V]
ETMY T240 1 DOF X/U = 0.057 [V]
ETMY T240 1 DOF Y/V = 0.198 [V]
ETMY T240 1 DOF Z/W = 0.253 [V]
ETMY T240 2 DOF X/U = -0.087 [V]
ETMY T240 2 DOF Y/V = 0.215 [V]
ETMY T240 2 DOF Z/W = 0.046 [V]
ETMY T240 3 DOF X/U = 0.268 [V]
ETMY T240 3 DOF Y/V = 0.085 [V]
ETMY T240 3 DOF Z/W = 0.136 [V]
ITMX T240 1 DOF Y/V = 0.289 [V]
ITMX T240 2 DOF X/U = 0.131 [V]
ITMX T240 2 DOF Y/V = 0.257 [V]
ITMX T240 2 DOF Z/W = 0.242 [V]
ITMX T240 3 DOF Y/V = 0.119 [V]
ITMX T240 3 DOF Z/W = 0.061 [V]
ITMY T240 1 DOF X/U = 0.062 [V]
ITMY T240 1 DOF Y/V = 0.159 [V]
ITMY T240 1 DOF Z/W = 0.027 [V]
ITMY T240 2 DOF X/U = 0.021 [V]
ITMY T240 2 DOF Y/V = 0.243 [V]
ITMY T240 2 DOF Z/W = 0.16 [V]
ITMY T240 3 DOF Y/V = 0.082 [V]
BS T240 1 DOF X/U = 0.261 [V]
BS T240 1 DOF Y/V = -0.212 [V]
BS T240 1 DOF Z/W = -0.179 [V]
BS T240 2 DOF X/U = 0.142 [V]
BS T240 2 DOF Y/V = -0.271 [V]
BS T240 3 DOF Y/V = 0.061 [V]
BS T240 3 DOF Z/W = -0.263 [V]
HAM8 1 DOF X/U = -0.3 [V]

Assessment complete.
Averaging Mass Centering channels for 10 [sec] ...

2026-02-20 11:36:14.268587
There are 2 STS proof masses out of range ( > 2.0 [V] )!
STS EY DOF X/U = -4.582 [V]
STS EY DOF Z/W = 2.384 [V]

All other proof masses are within range ( < 2.0 [V] ):
STS A DOF X/U = -0.51 [V]
STS A DOF Y/V = -0.798 [V]
STS A DOF Z/W = -0.581 [V]
STS B DOF X/U = 0.108 [V]
STS B DOF Y/V = 0.953 [V]
STS B DOF Z/W = -0.309 [V]
STS C DOF X/U = -0.871 [V]
STS C DOF Y/V = 0.868 [V]
STS C DOF Z/W = 0.593 [V]
STS EX DOF X/U = 0.507 [V]
STS EX DOF Y/V = -0.551 [V]
STS EX DOF Z/W = -0.392 [V]
STS EY DOF Y/V = 1.204 [V]
STS FC DOF X/U = 0.153 [V]
STS FC DOF Y/V = -1.174 [V]
STS FC DOF Z/W = 0.637 [V]

Assessment complete.
Results copied to clipboard

Fri Feb 20 10:13:20 2026 INFO: Fill completed in 13min 17secs

The slow controls software was updated to include the ChetaX  electronics. The chassis is currently in the MSR for test purposes, but will be moved to the cheta lab next week.

Channels are located under H1:AWC-ITMX.

TITLE: 02/20 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: 14mph Gusts, 10mph 3min avg
    Primary useism: 0.02 μm/s
    Secondary useism: 0.21 μm/s 
QUICK SUMMARY:

IFO is IDLE for PLANNED MAINTENANCE

JAC/HAM1 work continues

At 17:26 Thursday 19feb2026 h1iopiscex had a timing glitch causing a TIM+ADC error in its state word.

At 20:00 I restarted all the models which cleared the error.

Beam dump for HAM1-HAM2 septum window AR reflection.

This was installed. 

Beam dump for the -Y door viewport reflection.

Jason and Betsy installed it. There seems to be a discussion as to whether or not something else needs to be done.

EOM and JAC power budget again.

We measured the power at various places. While Jason held the power meter head still, I ran the statistics function of the power meter for a few seconds. I only list the mean and the standard deviation.

Wrong pol is king of large, ~0.2% of the main beam power coming out of EOM. That's 200mW when 100W goes through the EOM. 

JAC throughput of 92% is not great, but Jason says the alignment and the matching are not really optimised.

Rahul, Jeff, Oli

In December 2025 when we needed to compensate for the HAM1 DACs moving from 16- to 28-bit, we had decided to have FM10 in the COILOUTF bank be gain(1024), and put the remaining gain(4) upstream in multiple other places (88553). This led to our confusion today when we realized that when taking transfer functions for PM1 and JM3, the TEST banks had gone back to gains of 1 a couple weeks ago, and since we had damping off, the extra gain wasn't going through to the excitation. This might at least partially be why PM1 had dropped in magnitude, and why the JMs are so low in magnitude too.

To solve confusion, I've gone through PM1, RM1, RM2, JM1, and JM3 and removed the extra gain(4) that's in:
- DAMP bank FM4
- TEST bank gains (if still there)
- OPTICALIGN gains
- LOCK filter bank gains
Then I updated the gains in COILOUTF FM10 from gain(1024) to gain(4096).

I've sdf'd the values and loaded in the changed filter modules. I also committed the filter file.

*To remove future confusion about the difference in value of the "28BitDAC" filter module in COILOUTF FM10, I am going to go through all the suspensions and change the name of that filter from "28BitDAC" to be something like "16to28Bit" or "18to28Bit" depending on the previously used DAC bits

TITLE: 02/20 Day Shift: 1530-0030 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Planned Engineering
INCOMING OPERATOR: None
SHIFT SUMMARY: More HAM1 alignment work today
LOG:                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          

RyanC, Rahul

We glued prisms (primary - sapphire and secondary - metal) to the HRTS OM0 fused silica Optic, meant for LHO (D2100495-V5-OM0-02).

Attaching two pictures below for reference - they show the two prism glued to the barrel and the four magnet bases on the AR side of the optic.

I will post the details about its metrology later on.

---

OM0 optic meant for LLO has already been processed (i.e. prim glued) and shipped in Jan2026 - see alog 88786 for details.

S. Muusse, C. Compton, S. Goswami

We started populating and aligning optics on the second table. Most optics are now mounted and the beam is aligned upto M3 as per the fintrace model. We have aligned with the PD pick off in to save realignment later.

Construction begun on the camera can (D1300703) but did not get far as the screws which are fixed into the side panels (D2500165) are not long enough to reach the nuts attached to the other face of the box. Pictures of these components are attached.

We attached the viewport housing on the table which fits as expected. (photos attached)

Closes FAMIS#39752, last checked 89164

Laser Status:
    NPRO output power is 1.841W
    AMP1 output power is 70.47W
    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 0 days, 2 hr 51 minutes
    Reflected power = 26.95W
    Transmitted power = 104.0W
    PowerSum = 131.0W

FSS:
    It has been locked for 0 days 0 hr and 0 min
    TPD[V] = 0.4856V

ISS:
    The diffracted power is around 3.8%
    Last saturation event was 0 days 2 hours and 9 minutes ago

Possible Issues:
    PMC reflected power is high

Closes FAMIS#39855, last checked 89138

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

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

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.

DAQ was restarted around 12:02 PM  PST after restarting h1ascimc. 

Jennie W, Ryan S

Summary: Ryan and I updated the JAC and IMC ASC models. We installed JM3 yesterday and so now the IMC cannot use the PSL PZT mirror as an alignment actuator. I have committed the changes to the svn but erik and dave will do some checks tomorrow before they commit to the revision locked version of the model and restart the DAQ. So changes are not 'live' yet.

The edits were made to h1ascimc.mdl which has top level blocks for IMC and JAC.

The JAC top level model sends signals directly to the PSL PZT mirror and these degrees of freedom are swapped as the PSL PZT basis P and Y are switched before input to the JAC due to the HAM1 input periscope.

I took out the feedback paths for PZT_P and PZT_Y that come out of the IMC block. The picture shows the old config and I have highlighted what I removed.

At the top level, IMC no longer sends signals to the PZT but instead to JM3. On the top level diagram, the signal JM3_P is sent via PCI cards to the channel "H1ASC-JM3_YAW_SUSHTTS" as pitch in the JAC basis is yaw in the IMC basis due to the HAM1 output periscope. The picture shows the old config and I have highlighted what I swapped.

The signal JM3_Y is sent via PCI cards to the channel "H1ASC-JM3_PIT_SUSHTTS" as yaw in the JAC basis is pitch in the IMC basis due to the HAM1 output periscope.

Within the IMC top names block I removed the output channels for the PZT from the WFS feedback path, we already had paths to feedback to JM3 within this path. The picture shows the new config.

I removed the PZT locking path from the LCKIN block and replaced it with one for JM3. The picture shows the new config. I am not sure we ever use this path (which is for dither asc control of the IMC) in the first place so maybe this was unneccessary.

I also removed the channels H1:IMC-PZT_YAW_OUT and H1:IMC-PZT_PIT_OUT from the DAQ channel list for the IMC model.