WP 12463: This will close this FRS: https://services1.ligo-la.caltech.edu/FRS/show_bug.cgi?id=5861

We changed PSLFSS and PSLPMC model and related MEDM screens and confirmed that the PMC and FSS relocked right away before RyanS started his work in the PSL room. Guardian was modified to accomodate this. Safe SDF for PMC and FSS were updated.

(FYI, the motivation for this ancient ticket was to kill the habit of using arbitrary number for ON/OFF status, which was really bad in all PSL models. Depending on who wrote what, sometimes 1 means ON, sometimes -1, some other times -30000, and these status were cdsEpicsInput which are floating point. Now they're cdsEpicsBinIn, which is binary, ON is 1, OFF is 0.)

Model changes:

I pulled pslfss and pslpmc model from svn to close the FRS above. We'll have to keep some local modifications unique to LHO at least until the end of the run. Due to local changes, the models will not be committed to SVN upstream.

Changed models: ${userapps}/release/psl/common/models/pslfss.mdl, ${userapps}/release/psl/common/models/pslpmc.adl, ${userapps}/release/psl/h1/models/h1pslfss.mdl.

See the first two screen shots.

Local modifications 1: Adding back CALI filters.

These filters are not used any more from this point on. However, removing these from DAQ means that we cannot trend the data of these back without using NDS2 and specifying epoch, which is not a great thing to do in the middle of the run.

1. Added back PSL-FSS_TEST1_ON_CALI and PSL_FSS_TEST2_ON_CALI filters to pslfss common model, but grounded all of them.
2. Added back PSL-PMC_TF_IN_ON_CALI, PSL-PMC_LOCK_ON_CALI, RAMP_ON_CALI, BLANKING_CALI, BOOST_CALI filters to pslpmc common model, but grounded all of them.

See the first and second screen shot (red in the left panel).

Local modifications 2: Move NPRO_TEMP_OUT out of the common model and into the H1 model.

Dave originally added NPRO_TEMP_OUT channel to DAQ at 256Hz locally to the common FSS model in May 2023. However, he moved it to h1pslfss.

Local modifications 3: Don't change binary to DAC count and convert it back to binary

There was such a block in the common PMC model in the SVN (1st screen shot, right panel, green), which was eliminated in the local common model for the sake of simplicity.

Local modifications 4 (cosmetic): Define a constant representing DAC count that will produce +10V in the model.

Blue in the first two screen shots.

Dave thinks that this needs to be in the top level of local models (not in the common model) right before the signal goes to DAC in the future. That way, when we upgrade the DAC we can just change the constant.

MEDM changes:

Manually changed: ${userapps}/release/psl/common/medm/PSL_PMC.adl as the file on SVN still uses the old logic.

Pulled from SVN: ${userapps}/release/psl/common/medm/PSL_FSS.adl and ${userapps}/release/psl/common/medm/FSS/MAN.adl (and other things in FSS directory).

Guardian changes:

In isc_library.py,
L200    if ezca['PSL-PMC_LOCK_ON'] != -30000:
was changed to
L200    if ezca['PSL-PMC_LOCK_ON'] == 0:

In LASER_POWER.py,
L157            elif self.timer['wait_for_busy'] and ezca['PSL-ROTATIONSTAGE_STATE_BUSY'] == 0 and ezca['PSL-PMC_LOCK_ON'] == -30000:
L161            elif self.timer['wait_for_busy'] and ezca['PSL-ROTATIONSTAGE_STATE_BUSY'] == 1 and ezca['PSL-PMC_LOCK_ON'] == -30000:
were changed to
L157            elif self.timer['wait_for_busy'] and ezca['PSL-ROTATIONSTAGE_STATE_BUSY'] == 0 and ezca['PSL-PMC_LOCK_ON'] == 1:
L161            elif self.timer['wait_for_busy'] and ezca['PSL-ROTATIONSTAGE_STATE_BUSY'] == 1 and ezca['PSL-PMC_LOCK_ON'] == 1:
 

SDF changes:

See screen shots 3 and 4. (You can see that the old setpoints were float and the new setpoints are binary.)

It's not shown in the last screen shot but I accepted H1:PSL-FSS_AUTOLOCK_ON in the afternoon after RyanS locked the FSS again.

Marc Daniel

One of the coax cables shows a discontinuity at the feedthrough, ISC_RF25-B/3. This is the coax for ASC-REFL_B 9MHz chn 4 (Q4 RF Low). This is feedthrough D1-1D1. We can see the signal going though the pig-tail but terminating at the feedthrough. This could be an issue of the in-air pig-tail or the in-vac cable at the  feedthrough side.

Typical In-vacuum RFPD ASC Wiring Chain for aLIGO: https://dcc.ligo.org/LIGO-D1300467
O5 ISC/SQZ Wiring Diagram: https://dcc.ligo.org/LIGO-D1900511

Now that we have restored PSL picomotor functionality by moving them to their own driver, I took the time this afternoon to touch up alignment into the PMC and RefCav as they had been declining. For the PMC, with the ISS off, my adjustments went as follows:

• PMC trans start: 103.9W
• PMC trans end: 105.0W
• PMC REFL start: 23.5W
• PMC REFL end: 22.6W

It's possible there's still more pitch adjustment that could be tried here as seen by the PMC REFL camera, but I was no longer seeing improvement while doing my adjustments.

After turning the ISS back on and ensuring it was diffracting about 4%, my RefCav adjustment followed:

• TPD start: 650mV
• TPD end: 804mV

Decent improvements all around. I've attached a snapshot of the quad display for reference after my alignment was complete.

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

Dew point measurement at HAM1 , approx. -44C

WP12466

Dave:

A new h1iopsush2b model was installed which added a PM1 OSEM + DACKILL parts and AND'ed their output to those of RM1 and RM2 to form the HAM1 SWWD IPC.

Model changes and new MEDMs are shown below.

Note that this is the first instance of a 3-SUS SWWD, so a new common medm was needed.

Daniel, Dave:

Daniel has added JAC channels to the ISC-CS slow controls Beckhoff PLC. H1EPICS_ECATISCCS.ini has new H1:JAC channels, these are listed below.

We have decided at this stage to not add these to the DAQ today, we will defer this until the next maintenance period.

+[H1:JAC-ERROR_CODE]
+[H1:JAC-ERROR_FLAG]
+[H1:JAC-REFL_A_DEMOD_DEMODULATORTYPE]
+[H1:JAC-REFL_A_DEMOD_ERROR_CODE]
+[H1:JAC-REFL_A_DEMOD_ERROR_FLAG]
+[H1:JAC-REFL_A_DEMOD_LOMON]
+[H1:JAC-REFL_A_DEMOD_LONOM]
+[H1:JAC-REFL_A_DEMOD_POWEROK]
+[H1:JAC-REFL_A_DEMOD_RFMAX]
+[H1:JAC-REFL_A_DEMOD_RFMON]
+[H1:JAC-REFL_A_DEMOD_SIGN]
+[H1:JAC-REFL_A_DEMOD_SIGNNOM]
+[H1:JAC-REFL_A_ERROR_CODE]
+[H1:JAC-REFL_A_ERROR_FLAG]
+[H1:JAC-REFL_A_PHASE_DELAYNS]
+[H1:JAC-REFL_A_PHASE_DELAYSTEP]
+[H1:JAC-REFL_A_PHASE_ERROR_CODE]
+[H1:JAC-REFL_A_PHASE_ERROR_FLAG]
+[H1:JAC-REFL_A_PHASE_FREQMHZ]
+[H1:JAC-REFL_A_PHASE_PHASEDEG]
 

We lubricated the fan bearings in all the air handlers and switched the lead/lag units. 

WP12479 Fil, Dave:

Fil has fixed the missing slow controls Beckhoff terminals at EX which were lost after the site power outage Sun 6th April 2025 18:05 PDT.

Attached 18 day trend of the baffle PD signals show the loss and restoration of signal.

The CDS overview had been expecting only 125 of 127 terminals, and was displaying the degraded DEV4 in dark green, turning to red now all 127 terminals are back. I have removed this exception, DEV4 is now nominal green when new overviews are opened.

Tagging AOS.

The TwinCAT slow controls software was updated to incorporate LSC-REFL_B. This includes controls and readbacks for a new demod chassis and a new delay line.

J. Oberling, J. Warner

After letting things settle overnight we took another look at the WHAM1 ISI alignment this morning.  Jim found that a few of the HEPI stops had become engaged (likely during the final moves yesterday afternoon), so he backed those off and I took a look at ISI alignment.  Again, the ISI position is reported as deviation from its nominal LHO global coordinates of [-22726.7, 0.0, -201.9] mm.

• X axis: +0.95 mm
• Y axis: +0.3 mm
• Z axis: +0.36 mm
• Yaw: ~144 µrad CCW
• Level to within 0.75 mm

Jim said this was good enough to begin attaching HEPI actuators, so that work has begun.  We'll take another look at ISI alignment once the actuators are attached.

Data

Data for the above alignment deviations.  Method described in alog 84057.

X axis position and yaw:

• +Y scale reading: +0.8 mm
• -Y scale reading: +1.1 mm
• X axis position: (1.1 + 0.8) / 2 = +0.95 mm
• Yaw: (1.1 - 0.8) / 2082.8 = +144 µrad => 144 µrad CCW

Y axis position:

• Total Station EDM: 2009.6 mm
• Target: 2009.3 mm
• Deviation: +0.3 mm

Z axis position and level:

• -X/+Y: 3.91"
• -X/-Y: 3.92"
• +X/+Y: 3.935"
• +X/-Y: 3.94"
• Average: 3.926"
• Target: 3.94"
• Deviation: +0.014" => +0.36 mm
• Level: 3.94 - 3.91 = 0.03" => 0.75 mm

Gerardo, Dave:

GV2 was transitioned from closed to open. I have reconfigured alarms to expect this gatevalve to be fully open and alarm if not.

Camilla, Jennie W

Finished getting all the ISC components ready to go back onto HAM1, previous alogs 83945, 83875, 83858.

Last steps were to replace all remaining black glass v-shaped beam dumps with DLC coated SS (Alena sent us more D1800140-v1-01/02). This was 6 beamdumps: BD1, BD6a, BD11, BD13, BD14 and BD16. The glass was very tightly wedged into BD6a, so I removed the hole v-holder and swapped with a new one. 

Now everything is ready, on the rack in the HAM3 cleanroom.

I ran the bootserver puppet on h1vmboot1 to reorder the models on h1seih16.  The puppet module was updated to the latest from gitlab.

WP 12480
FRS 6499

The PSL picomotor controls have been moved from the ISC Driver to the PSL Driver installed in the PSL-R2 Rack (alog 63613, alog 62830). The new DB25 cable is routed from behind the PSL field rack into the enclosure. The old controls cable was pulled out of the enclosure and will be reused for HAM1/JAC. Ryan Short is testing picomotors are operational through MEDM.

F. Clara, R. McCarthy, R. Short

R. Crouch, J. Warner, J. Oberling

We took a first look at the alignment of the WHAM1 ISI today.  Quick alog with results, I'll add details as a comment tomorrow.

Nominal position of the WHAM1 ISI is, in LHO global coordinates, [-22726.7, 0.0, -201.9] mm.  I post the results as deviations from these nominal positions.

Initial:

• X axis: -2.5 mm
• Y axis: +0.4 mm
• Z axis: +4.1 mm
• Yaw: ~576 µrad CCW
• Level to within 0.25 mm

After a few rounds of adjustments, the final measurements for the day:

• X axis: +0.25 mm
• Y axis: Did not measure
• Z axis: +0.76 mm +0.69 mm
• Yaw: ~240 µrad CW CCW
• Level to within 0.25 mm

Will let things settle overnight and take a full round of measurements in the morning, including another look at y-axis position (since we didn't get a final measurement on that).  Will do any further adjustments at that point.

The IAS survey equipment is still set up on the -Y side of WHAM1 (East if going by crane directions).  Please do not disturb this equipment!

Edit 4/22/2025: Had the wrong yaw direction for the final set of measurements, should be CCW.  Also had the wrong z-axis deviation for the final set of measurements, should be +0.69 mm.

Jason, RyanC, Mitch, Randy, Jim

This morning Randy, Mitch and I put initial payload on the HAM1 ISI, 210kg of tabletop mass, stacks of 2 D091075 10kg masses. 3 of these stacks are suspended on viton for damping, these are spread across the table as much as I could, but the drawing I'm working from basically has them all in a row down the middle. This got the payload close enough that we could start thinking about initial alignment. 

After lunch, we went out and squeezed 4 more dial indicators on the north side of the chamber. This was pretty difficult getting 2 under the chamber and then attaching 2 more with magnetic bases to the HAM2 crossbeams. With that, we were able to start putting weight on the HEPI springs. We went to each corner, backed all of the stops off till they were barely touching the foot, except for the 3 stops holding the corner up. We then evenly loaded the springs on one pier until the bottom stops were free, while watching dial indicators to make sure nothing moved too much.

Once all 4 corners were floating on springs, we called Jason and Ryan out to set up and take position shots with the total station. All of us very much missed the Faro for the next 90 minutes. When they were set up and got a measurement, I went around and tweaked the springs until the ISI was within more or less +/- 1mm. Table is level to about 1/4 mm across the 4 points we measured. Table yaw I think was out about 250 urad, but hopefully Jason can put some numbers up later.

Tomorrow, the plan is to lock HEPI again, verify we haven't disturbed the position and start reattaching actuators. When that is done, ISC can start their reinstall.

Took transfer functions for ITMY M0 and R0 now that we are in a good enough vacuum. The ones I had taken in air before doors were put on are here: 83876.

M0
Data (/ligo/svncommon/SusSVN/sus/trunk/QUAD/H1/ITMY/SAGM0/Data/)
2025-04-21_1700_H1SUSITMY_M0_Mono_WhiteNoise_{L,T,V,R,P,Y}_0p01to50Hz.xml
Results (/ligo/svncommon/SusSVN/sus/trunk/QUAD/H1/ITMY/SAGM0/Results/)
2025-04-21_1700_H1SUSITMY_M0_ALL_TFs.pdf
2025-04-21_1700_H1SUSITMY_M0_DTTTF.mat
Committed to svn as r12261 for both Data and Results

R0
Data (/ligo/svncommon/SusSVN/sus/trunk/QUAD/H1/ITMY/SAGR0/Data/)
2025-04-21_1800_H1SUSITMY_R0_WhiteNoise_{L,T,V,R,P,Y}_0p01to50Hz.xml
Committed to svn as r12259
Results (/ligo/svncommon/SusSVN/sus/trunk/QUAD/H1/ITMY/SAGR0/Results/)
2025-04-21_1800_H1SUSITMY_R0_ALL_TFs.pdf
2025-04-21_1800_H1SUSITMY_R0_DTTTF.mat
Committed to svn as r12260

I wanted to compare these measurements with old ones, and on the first try I tried comparing these measurements to the last time that ITMY measurements in vac were taken, which was a measurements set from 2018-05-22_2119 and 2018-06-08_1608 for M0 and R0 respectively. However, comparing these two measurements to the ones I just took, there are multiple differences in some of the cross-coupling traces, so I then decided to also compare my measurements to the last full set that was taken (which was in air), 2021-08-10_2115 and 2021-08-11_2242 for M0 and R0. These measurements line up well with the current measurements, so ITMY is looking good!

Comparison between May/June 2018 In-Vac vs Aug 2021 In-Air vs April 2025 In-Vac (/ligo/svncommon/SusSVN/sus/trunk/QUAD/Common/Data/)
allquads_InVacComparison_MayJun2018vAug2021vApr2025_ALLM0_TFs.pdf
allquads_InVacComparison_MayJun2018vAug2021vApr2025_ALLM0_ZOOMED_TFs.pdf
allquads_InVacComparison_MayJun2018vAug2021vApr2025_ALLR0_TFs.pdf
allquads_InVacComparison_MayJun2018vAug2021vApr2025_ALLR0_ZOOMED_TFs.pdf
allquads_InVacComparison_MayJun2018vAug2021vApr2025_ALL_TFs.pdf
allquads_InVacComparison_MayJun2018vAug2021vApr2025_ALL_ZOOMED_TFs.pdf
Committed to svn as r12263