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.

Tue Apr 22 10:07:18 2025 INFO: Fill completed in 7min 14secs

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

TITLE: 04/22 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: 7mph Gusts, 5mph 3min avg
    Primary useism: 0.03 μm/s
    Secondary useism: 0.20 μm/s
QUICK SUMMARY:

IFO is in PLANNED ENGINEERING for the vent.

Some of today's planned maintenance:

• SEI/IAS - Continue work on HAM1
• EE - HAM1 Cable work continued
• Randy - Crane 3IFO flange crate over BT to first stop West Bay for later X-arm traverse
• GC - Wireless network work
• Keita - h1pslfss and h1pslpmc model updates and DAQ restart

Work safe!

4-21 (Monday) activities:

- The aux carts from the annuli of GV5 and HAM4 were valved out; after a little hesitation, both IPs turned over, so now all AIPs are in good shape, without external support
- The pumpdown of the corner continues, with the corner being at 1.51E-6 Torr, and HAM6 is at 1.49E-6 Torr. There is a ~17% increase in pumping speed relatively to the last pumpdown in 2024 August. The details will be summarized soon.
- The pressure in the soft-closed GV7's actuator was increased from 10 to 15 psig, in preparation of opening GV2 tomorrow
- The flanges of the recently installed HAM6 turbo and HAM6 gauge was leak checked, no leaks were found, with the background of <1.0E-10 He
- All the welding seams on the X-manifold have been leak checked, no leaks were found, with the background changing between 2.6-3.0E-10 He. The welds have been individually bagged, see attached pic

Edgard, Brian.

Following up on the fits for the SR3 estimator. I ran the plotall scripts on the transfer functions we took last Friday [see 84003]. Then ran the attached code to fit the transfer functions.

Figure 1 shows the ISI-M1 fitted transfer function. The Q-factors for the fit were tweaked by hand so I could get a decent fit. The exported M1 to M1 transfer function is shown in the second attachment. I decided it should have the same poles as the ISI one, and the gain was fit so the estimator matches the high-frequency behavior of the measured transfer function. The choice to share poles is because the math indicates that it will lead to some potential modeling errors cancelling out.

The pole information for the two filters is:

         Pole              Damping       Frequency      Time Constant  
                                       (rad/seconds)      (seconds)    
                                                                       
 -4.38e-02 + 6.38e+00i     6.86e-03       6.38e+00         2.28e+01    
 -4.38e-02 - 6.38e+00i     6.86e-03       6.38e+00         2.28e+01    
 -7.64e-02 + 1.44e+01i     5.30e-03       1.44e+01         1.31e+01    
 -7.64e-02 - 1.44e+01i     5.30e-03       1.44e+01         1.31e+01    
 -2.97e-02 + 2.13e+01i     1.39e-03       2.13e+01         3.37e+01    
 -2.97e-02 - 2.13e+01i     1.39e-03       2.13e+01         3.37e+01

And the zpk strings (in MATLAB format) are:

ISI to M1:

zpk([-0.068+20.398i,-0.068-20.398i,-0.099+11.454i,-0.099-11.454i,0,0],[-0.03+21.271i,-0.03-21.271i,-0.076+14.435i,-0.076-14.435i,-0.044+6.384i,-0.044-6.384i],-0.75)'

M1 to M1:

zpk([4745.079,-0.089+8.28i,-0.089-8.28i,-0.113+19.058i,-0.113-19.058i],[-0.03+21.271i,-0.03-21.271i,-0.076+14.435i,-0.076-14.435i,-0.044+6.384i,-0.044-6.384i],-0.015)

I did the fits by using the spectrumest function in MATLAB (which is sadly not available in 2019a). The long term plan is to switch to one of the many python fitting tools that people like for the fits. The code is attached to this logpost for bookkeeping

Today I setup h1daqfw2 as a platform to test a new frame writer for use after O4.

For the fw hardware I repurposed h1digivideo3 which is an older Xeon server with 10 cores and 64GB of ram.  I added 2x2TB old hard disks in a RAID 0 config (to improve the write performance).  At this point I am not looking to do any mid to long term storage of frames.

I did not connect this up to the data stream via dolphin.  Instead I am running a new instance of cps_xmit on h1daqnds0 and using that over a new dedicated 1g link to h1daqfw2.  I've updated the puppet config for h1daqnds0 to make this a persistent change.

At this point I am running the new frame writer on h1daqfw2, and it is producing frames.  I need to do some more configuration (mainly around the run number server) so the frames will be identical to those output from the other frame writers (the difference should be in metadata in the frame headers, not the recorded data).  In simulated data setups I have produced frames that are byte for byte identical to daqd frames so it is fairly likely that after I get that working I will see identical frames.

The point of this frame writer is to move towards a auto-reconfiguring/restartless system that is able to adjust on the fly to channel changes, remove some other limitations in the daqd, and to become the ngdd projects frame writer for downstream derived data products.

The first things I will look at with this is memory and cpu requirements under the H1 load.

This testing will be ongoing.

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.

TITLE: 04/21 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Planned Engineering
INCOMING OPERATOR: None
SHIFT SUMMARY:

HAM Team1 has said "We managed to suspend HEPI on HAM1, but are still doing initial alignment so the mechanical stops are disengaged. The whole stack is just on springs, so running into the crossbeams could damage the bellows if done with enough exuberance. Don't do that. "

Norco Contractor arrived at at 17:20 UTC 
Model resart H1ASC H1LSC starting at 19:50 UTC

LOG:

[Betsy, Camilla, Elenna, Oli]

We cleared half of the HAM1 table today on the +y side. This cleared optics on the ALS and POP paths, and the first part of the optics on the REFL path. We carefully labeled each component, and Oli logged component and cable names with serial numbers. Betsy laid the components in clean pans lined with cleanroom cloths. The cables are still attached to the feedthroughs and were left lying at the bottom of the chamber.

Attached photos show cleared side of the table.

Before removing components, we reviewed the table layout after Ibrahim and TJ noticed some discrepancies between the solidworks drawing and the optic locations as depicted in Corey's pictures from yesterday. We confirmed that there are some dispcrepancies between the two. TJ has a more detailed report.

Sheila turned OPO trans back to 96uW so expect NLG to be 19 going into Observing, larger than normal but closer to the value uses before the last OPO crystal move. SQZ angle servo off and angle set back to 171. ADF left on.