OPS Day Shift Summary

TITLE: 03/18 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Planned Engineering
INCOMING OPERATOR: Ryan C
SHIFT SUMMARY:

IFO is in a single bounce configuration

Overall calm day (though wind is on the rise).

The day started with an initial alignment that could help align the squeezer better. Steps taken were:

1. GREEN_ARMS_MANUAL - lock ALS - INITIAL_ALIGNMENT_OFFLOAD - ALSY was not showing up and trending told us BS was off so we adjusted it.

2. Went to MANUAL_INITIAL_ALIGNMENT

3. POWER to 10W. MICH_DARK_LOCKED (NO WFS). Adjust BS by hand to minimize AS_A

4. POWER to 2W, PRX_LOCKED, Adjust PRM to maximize AS_A

5. POWER to 10W, OFFLOAD_SR2_ALIGN - Fully auto

6. SRY_LOCKED, Adjust SRM by hand to maximize AS_A

7. POWER to 2W, AS_CENTERING_SINGLE_BOUNCE - Fully Auto. Ensure SRM, ITMX, PRM, ETMX, ETMY are misaligned (should do this on its own).

8. AS_CENTERING_OFFLOAD.

This is how to initially align.

Otherwise, SQZ work was the main task today - progress was made.

LOG:                                                                                                                                                                                                                                                                                                                                                                                                                        

Start Time	System	Name	Location	Lazer_Haz	Task	Time End
14:41	FAC	Randy	LVEA	n	Removing +X of BSC2 (Craning)	15:10
14:44	FAC	Nellie, Kim	LVEA	N	Technical Cleaning	15:47
16:06	FAC	Nellie, Kim	LVEA	N	Technical Cleaning	17:01
17:02	TCS	Sophie	Vac-Prep	N	CHETA	19:24
17:17	ISC	Oli, Elenna	Optics Lab	Local	BHD Work	19:31
17:30	SQZ	Camilla	Optics Lab, LVEA	Local	Grabbing optics	18:26
17:41	EE	Fil	MY	N	Look for cables at MY	18:41
18:13	VAC	Gerardo, Camilla, Gabriele	Optics Lab	N	Viewport inspection	19:31
18:26	PEM	RyanC	LVEA/CER	N	Checking dust monitors	18:36
18:28	SAF	Richard	LVEA	N	Checking curtains	18:36
18:52	SPI	Jeff, Jim	Optics Lab	Local	SPI work	22:00
19:42	OPS	Ryan C	CER	N	Dust monitor data	19:45
20:01	EE	Fil	LVEA	N	Cabling by biergarten	23:13
20:15	SQZ	Sheila	FCES	N	Recovering SQZ	22:04
21:06	BHD	Elenna, Keita, Oli	OptLab	y(local)	BHD work	23:54
21:21	TCS	Camilla, Sophie	LVEA	N	Marking stickers in prep	22:04
22:53	TCS	Sophie	Vac prep lab	N	CHETA work	23:16
23:15	VAC	Gerardo	Site buildings	N	Cryotrap checks around site	01:15

OPS Wednesday EVE shift start

TITLE: 03/18 Eve Shift: 2330-0500 UTC (1630-2200 PST), all times posted in UTC
STATE of H1: Planned Engineering
OUTGOING OPERATOR: Ibrahim
CURRENT ENVIRONMENT:
    SEI_ENV state: CALM
    Wind: 22mph Gusts, 12mph 3min avg
    Primary useism: 0.04 μm/s
    Secondary useism: 0.39 μm/s 
QUICK SUMMARY:

• The SQZer was worked on today, along with the overall IFO input / pointing alignment
• Winds been creeping up, microseism is decreasing

looking for the filter cavity alignment

Sheila, Gabriele, Camilla

The squeezer wasn't initially aligned to the filter cavity yesterday.  This morning I dither locked the OPO and rastered the alignment of ZM2+ZM3, and saw some IR flashes on SQZ-FC_TRANS_D_LF_OUT_DQ (IR at FCES), but this misaligned the beam so that it didn't make it back through the VIP to SQZT7.  I spent some time trying to walk FC1,2,ZM3 to get flashes and the beam on SQZT7, partially sucsesfully, now Camilla has done this same walk with FC2 misaligned and found both the transmission to FCES and the beam on SQZT7 at the same time.  

Gabriele and I went to the FCES to look for beams with cards, we weren't able to see anything.  However, when we got back we realized that the green beam wasn't injected at that time, so we will have to go back.  Camilla is still walking beams now, and we will return to FCES in the morning.  

Cabling for testing of BS on West Bay Test Stand

WP 13101

Four DB25 cables were pulled from the HAM3 SUS-R2 rack down the Y-Arm. Cables around HAM3 are clear of any door removal activities. Cables reached the pylon on the Y arm. A second set of DB25 cables will be used to reach the mechanical test stand. These will be installed later, so as not to create a trip hazard or get damaged.

F. Clara, M. Pirello

TemTop dust monitors testing pt2

Follow-up to alog88174 on the new brand of dust monitors. The colors are consistent throughout the plots, blue for the control GT521s, red for the PMS21, yellow for the PMD331 in differential, and green for the PMD331 in cumulative.

After some back and forth with the companies support, they ended up sending us 2 new devices, a PMD331 and a PMS21. I ran a few tests with the new devices, the PMD331 continues to look reasonable and similar to the GT521s. Although I have some confusion to counting methods, the company says setting the unit of CFM (cubic foot / min) sets the counting method to differential but I'm not convinced. You can't specify counting method on this devices' interface unlike the PMD331.

The first test I ran was in the front room (incorrectly labeled as MSR) with two MetOne GT521s, a PMD331, and a PMS21. The second was in the CER with both PM# and one MetOne GT521s. The TemTops had filter elements built in which the MetOnes do not, I removed these, cleaned the devices of any leftover particulate from them and ran a bunch of cycles to clear out any more of those lingering particles. The PMD331's sampling clunk which was a multi-layered mesh style, unlike the PMS21 and GT521s which is just a funnel essentially, which seemed to be increasing the counts so I swapped it out to use the same one as the GT521s. After doing these things I prepared for the test by running both the zero count and flow rate calibrations on all the devices setup side by side.

 

The PMS21 still seems to be showing lower counts but it's not nearly as drastic as it was before. For the first test, I applied a scale factor of 2 and 4 for the 0.3um and 0.5um particles respectively. The second test I ran which was over a much longer time span (1.5 hours vs ~20 hours) in which the PMS21 performed more as expected, the 0.3um counts were pretty much spot on with the GT521. For the larger 0.5ums the counting was low as with the last device, this time the scale factor I found to be best was 3, compared to the 40 I had with the last device. This is the model that they prefer to make a pumpless version of, so I'm curious about testing a pumpless version from them to eliminate that potential source of error.

 

The PMD331 still seem reasonable although I have questions about the internal counting methods. I assumed the standard counting method was cumulative so I did some bin subtraction to the counts columns to convert it to differential counting by subtracting the 0.7um from the 0.5um and the 0.5um from the 0.3ums. I assumed the raw data collection was in cumulative as if it were the opposite the counts would be far higher than the GT521. For the 0.3um particle size bin, differential counting more closely match the control but for the 0.5ums it's less clear. The control (blue) trace is in-between the two, it matches the cumulative trace a bit better.

I have also relayed this info to the support engineer I've been talking to with TemTop.

CEBEX Progress pt2

DGR is yet to break ground on the project, but there have been some additional mobilization efforts. This morning I affixed a time-lapse camera to the roof of Mid-Y for project documentation which will schedule a capture every 10 seconds between the hours of 7AM and 5PM M-F. Snapped pics attached. Earthwork soon..

Wed CP1 Fill

Wed Mar 18 10:21:24 2026 INFO: Fill completed in 21min 20secs

 

h1ioplsc0 timing errors

We are tracking occassional timing errors on h1ioplsc0 which started following its restart yesterday morning when we modified h1lsc to add a DQ channel.

From that restart to now (22 hours) we have had 9 timing errors, of which 3 caused IPC receive errors on h1omcpi.

This had been seen before, in the 09dec2025 - 15dec2025 time period and appears to be related to restarts of the IOP, not code changes.

We don't think this will impact locking activities, we will keep investigating.

OPS Day Shift Start

TITLE: 03/18 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: USEISM
    Wind: 29mph Gusts, 24mph 3min avg
    Primary useism: 0.03 μm/s
    Secondary useism: 0.45 μm/s 
QUICK SUMMARY:

IFO is in IDLE and PLANNED ENGINEERING 

Plan today is to continue locking.

OPS Tuesday eve shift summary

TITLE: 03/18 Eve Shift: 2330-0500 UTC (1630-2200 PST), all times posted in UTC
STATE of H1: Planned Engineering
INCOMING OPERATOR: None
SHIFT SUMMARY: I couldn't get SRY locked/aligned, SR2 and SRM alignment should probably be looked at tomorrow.
LOG:

• I tried to start off with a fresh alignment, which wasn't so easy
• Using ISC_LOCK I locked the green arms, then ran their alignments (XARM didn't want to lock)
• I then went up to FIND_IR let X lock then adjusted PR2 to maximize X_IR, it was mostly Yaw.
  • PR2_P 1373.4 -> 1375.3
  • PR2_Y -227 -> -225.3
• I dropped into Manual_IA, starting with PRX
  • PRM_P -1580 -> -1574.5
  • PRM_Y 25.6 -> 60.6
• MICH_DARK (10Ws)
  • BS_P 101.7 -> 77.0
  • BS_Y -391.5 -> -392.6
• SR2 then SRY
  • SR2_P -129.5 -> 3.1 (seemed like a lot at the time)
  • SR2_Y 278.3 -> 269.0
  • I couldn't lock SRY and was prompted to do SR2 align by hand?
  • I moved around SR2 with SRM for a while but I wasn't able to find a good alignment to lock with
• 02:40 UTC Still not having any luck getting SRY locked, I'm doing to drop and give PRMI/DRMI a try for the last bit of my shift
  • Yarm is gone now? No light at all, couldn't find them scanning nearby with ITM ETM
  • Running Baffle PD scripts, TMSY then ITMY (these scripts take longer than I thought they did)
  • 20:05 UTC Still nothing on ALSY

Field Cable Work SUS-R2 and HAM2

WP 13089
WP 13095

The following work was completed today:

1. Beckhoff media converter placed on rack 24V power. Previously powered by bench power supply.
2. TCSX 24V power and IR sensor cables replaced with appropriate length cables. Both TCS laser controllers for X&Y were keyed off. Power supplies output in MER disabled. This was done in precaution since the media converter work could disable TCS chillers.  Laser controllers keyed on and power supplies output enabled when work was complete.
3. Three HAM2 L4C cables pulled from SEI-C2 to HAM2. Jim W. sorting out final flange locations.
4. Two 8 AWG power cables pulled from CER Mezzanine to SUS-R2.
5. A DB37 cable was pulled from CER SUS-C2 to SUS-R1. Part of QOSEM upgrade.

Remaining work on SUS-R2 includes installation of power junction box, power sequencer, and a ±18V power strip.

F. Clara, J. Figueroa, M. Pirello and R. Thompson

SQZ nonlinear gain, beam in HAM6

Sheila, Gabriele

Last week, Camilla started to get the squeezer working again in 89453, today I'm continuing that.

On Jan 29th, when we injected 74mW of seed into the CLF fiber, the rejected polarization PD in HAM7 for the IR fiber was saturated, and the CLF reflection trigger PD saw 21mW of seed, and when locked on the dither we get 0.8mW onto the OPO IR PD.   Now, we inject 74 mW, the rejected PD is still saturated, we have 22mW on the CLF reflected PD (trigger diode), so the fiber coupling efficiency and transmission seems similar to January.  However, we only have 0.1mW on the OPO IR PD diode (transmitted) as Camilla reported.  Looking at the OPO scan, the higher order mode is 13% of the 00 mode, so the alingment from the fiber into the OPO seems OK.  

The problem was the alignment of ZM2+ZM3.  According to their osems, they moved during pump down as is expected.  Restoring them to the osem values didn't bring us fully back to the 0.79mW OPO IR PD transmission, but I was able to walk them from there to get 0.74mW.  

The OPO green transmission is much lower than with the old OPO, this is expected because we are using the transmission through a M2 which is a high reflector for 532nm and the transmission can ve very different for different mirrors.  We during O4 we used 80uW as our setpoint for OPO trans, I set it to 23uW to get the pump ISS working.  I also edited line 232 of the OPO guardian , to set the trigger level for channel 1 (green trans) to 0.1 rather than 0.5.  

Without adjusting the translation stage, I checked the NLG at a few power levels for a threshold measurement:

OPO green transmission	max OPO IR PD (unamplified seed = 1.49e-3)	green launch power	NLG
24uW	0.435	21mW	297
12uW	0.0114	10mW	7.8
18uW	0.0423	15.2mW	28.97

We got rid of the global ir_locked_refl_min in the OPO guardian and replaced it with a self.ir_locked_refl_min in only the LOCKED_SEED_DITHER state. 

We moved FC1 and FC2 back to where they were in O4 according to the osems, and walked ZM3 to keep the OPO IR seed dither lock on SZT7.  Gabriele and I went to SQZT7 and tried to re-align the FCGS refl diode, I think I put the wrong beam on the diode.  

We opened the beam diverter and we can see the seed beam on AS A, B, and C.  We tried engaging the centering servos as in 88767, but this saturated ZM4.  We would like to run an interferometer alignment to check the alignment of SRM, OM1, and OM2 before we walk the ZMs.  

OPS Day Shift Summary

TITLE: 03/17 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Planned Engineering
INCOMING OPERATOR: Ryan C
SHIFT SUMMARY:

IFO is in IDLE and PLANNED ENGINEERING

Overall quiet day in terms of comissioning. Sheila and Gabriele are attempting to lock SQZ after going into local laser hazard at SQZT7. They're going into single bounce as of shift end.

Other work today:

- Craning in LVEA West Bay (Randy)

- SPI Work (Jeff/Jim)

- PCAL Work (Tony)

- HAM3 CER Cabling Work (Fil, Jackie, Marc)

- CHETA Work (Sophie)

- DAQ Restart 16:37 to 17:23 UTC (Jonathan) - alog 89541

- IOP H1SEIH16 Crash 21:14 to 21:43 (Dave) - alog 89542

- HAM1 ion pump opened (Jordan)

LOG:                 

Start Time	System	Name	Location	Lazer_Haz	Task	Time End
14:44	FAC	Kim, Nellie	LVEA	N	Technical Cleaning	15:23
14:44	SUS	Randy	LVEA	N	Craning in West Bay	15:46
15:23	FAC	Nellie	EY	N	Technical Cleaning	16:15
15:23	FAC	Kim	EX	N	Technical Cleaning	16:22
15:30	EE'	Fil	LVEA	N	Beckoff restart/maintenance	16:52
15:59	SEI	Jeff	Optics Lab	Local	SPI Work	19:09
16:05	VAC	Jordan	LVEA	Y	HAM1 Ion Pump Open	16:08
16:17	EE	Marc	LVEA	N	Helping Fil with Beckhoff + CER Cabling	18:18
16:22	FAC	Kim	FCES	N	Technical Cleaning	16:52
16:29	PCAL	Tony	PCAL Lab, EX	N	Packing up Rx Sphere, Putting PCAL back to nominal	18:43
16:31	FAC	Chris	MY	N	Snorkel lift battery change	17:40
16:33	FAC	Randy	LVEA	N	Craning	17:55
16:52	EE	Fil, Jackie	LVEA	Y	HAM3 to CER Cabling	17:42
17:06	CHETA	Sophie	Vac-Prep	N	Cheta testing	23:06
17:41	FAC	Chris	MY, MX, EX, EY	N	FAMIS Task	19:01
18:24	EE	Fil, Marc, Jackie	LVEA	N	CER to HAM3 Cabling	18:58
18:43	PCAL	Tony	PCAL	y(local)	PCAL work	20:10
19:26	SEI	Jeff, Jim	Optics Lab	Local	SPI Work	23:16
20:32	EE	Fil, Jackie, Marc	LVEA/CER	N	CER HAM3 Cabling	23:06
21:19	CDS	Dave	CER	N	Checking on faulty chassis	23:06
22:01	FAC	Richard	LVEA/CER	N	Helping Fil	22:18
22:16	PEM	RyanC	CER	N	Grab cable, turn on dm for network testing	22:22
22:40	SQZ	Sheila, Gabriele	LVEA	LOCAL	SQZT7 table work, LOCAL HAZARD NO WORK AT HEIGHT	23:10

OPS Tuesday eve shift start

TITLE: 03/17 Eve Shift: 2330-0500 UTC (1630-2200 PST), all times posted in UTC
STATE of H1: Planned Engineering
OUTGOING OPERATOR: Ibrahim
CURRENT ENVIRONMENT:
    SEI_ENV state: MAINTENANCE
    Wind: 11mph Gusts, 5mph 3min avg
    Primary useism: 0.03 μm/s
    Secondary useism: 0.29 μm/s 
QUICK SUMMARY:

• HAM1/6s IOP crashed recently, HAM1/6 SEI is on their way back to nominal
• SQZ table working starting

h1seih16 crash

Erik, Dave:

h1seih16's IO Chassis was accidentally power cycled via its front panel switch while in-rack cabling work was ongoing in the CER. All the models stopped running with ADC timeouts.

A simple stop/restart of the models did not work, and a lspci scan saw a corrupted bus, almost as if the Adnacos' had more slots.

We did a full power cycle of h1seih16 to recover. The sequence was:

1. stop the models

2. fence computer from Dolphin

3. power down computer

4. power down IO Chassis and AI chassis

5. power up computer

6. power up AI chassis

System is back up and running. SWWDs have been cleared.

CDS Maintenance Summary: Tuesday 17th March 2026

WP13096 Add missing h1lsc ALS DIFF PLL channel to DAQ

Jonathan, Erik, EJ, Dave:

The missing H1:ALS-C_DIFF_PLL_CTRL_OUT_DQ channel was added to the h1lsc model's DAQ Block.

We initially just restarted h1lsc, but this caused a DAC error in h1ioplsc0 (similar to h1ascimc and h1iopasc0) which meant we had to restart all the models on h1lsc0.

A DAQ restart was required.

WP13078 Add pending slow controls and h1sush6 to DAQ

WP13094 Add JAC CAM EPICS and CHETA slow chans to DAQ

DAQ RESTART

Jonathan, Erik, EJ, Dave:

A new H1EDC.ini was created with the following changes:

H1EPICS_DIGVIDEO.ini Regenerated with JAC CAM (cam38) added (+25)

H1EPICS_ECATTCSCS.ini Added CHETA laser pwr chans (+2)

H1EPICS_ECATAUXCS.ini Added C_PZT_SHUTTER chans (+11)

H1EPICS_FEC.ini Added h1sush6 models (+97)

H1EPICS_SDF.ini Added h1sush6 models (+160)

H1EPICS_DAQ.ini Added h1sush6 models (+32)

total +327. Num chans increased from 60582 to 60909.

Erik ran puppet to officially add all the new h1sush6 models to the system (I had done some hand-editing last week). He also determined the DAQ time slot h1sush6 should used.

Jonathan got the DAQ ready for the new front end and models. He also plugged the DAQ ethernet cable into the back of h1sush6 (the Dolphin cable remains unplugged for now).

We rebooted h1sush6 to get the DAQ sending started.

Jonathan then restarted the DAQ, starting with the 0-leg. I restarted the EDC at this time.

A second 0-leg restart was required to complete the configuration.

When this was stable, the 1-leg was restarted with no issues. 

We saw two spontaneous restarts of FW0 around this time, which had been seen before. At time of writing, FW0 has been up for 90 minutes.

Updates and Cleanup

Dave:

I regenerated the CDS Overview, changing h1sush6 from NO_DAQ to NOMINAL

I had to hand edit the python code generating the H1EPICS_[FEC,SDF].ini to add the new models even when they were not yet added to the DAQ, so we only needed to restart the DAQ once.

I updated DAQSTAT and CDS_HW_STAT to expect the new FECs, Models, ADCs, DACs.

Guardian Node Loading Modified Source Code.

Ryan S:

Recent changes to lscparams.py (last modified 18:43 16mar2026) and ISC_library.py (last modified 16:55 10mar2026) meant that 22 guardian nodes were pending reloading of these files.

Ryan verified that the changes made to the source code was orthogonal to the snipets used by these nodes and reloaded to the code into them to clear up the GRD CFC flags.

Loaded 273 opt/ file checksums from /opt/rtcds/lho/h1/data/guardian_files/current
Loaded 176 nodes from /opt/rtcds/lho/h1/data/guardian_files/current.yaml

================================================================================================
Node                    Status      File            Source Date            Running Date
================================================================================================
ALIGN_IFO               NOT LOADED  lscparams.py    18:43 Mon 16mar2026    12:16 Wed 11mar2026
ALS_COMM                NOT LOADED  lscparams.py    18:43 Mon 16mar2026    13:51 Mon 16mar2026
ALS_DIFF                NOT LOADED  lscparams.py    18:43 Mon 16mar2026    10:41 Fri 13mar2026
ALS_XARM                NOT LOADED  ISC_library.py  16:55 Tue 10mar2026    08:03 Tue 03mar2026
                        NOT LOADED  lscparams.py    18:43 Mon 16mar2026    08:03 Tue 03mar2026
ALS_YARM                NOT LOADED  lscparams.py    18:43 Mon 16mar2026    14:18 Wed 11mar2026
CAMERA_SERVO            NOT LOADED  ISC_library.py  16:55 Tue 10mar2026    08:02 Tue 03mar2026
                        NOT LOADED  lscparams.py    18:43 Mon 16mar2026    08:02 Tue 03mar2026
H1_MANAGER              NOT LOADED  ISC_library.py  16:55 Tue 10mar2026    08:03 Tue 03mar2026
                        NOT LOADED  lscparams.py    18:43 Mon 16mar2026    08:02 Tue 03mar2026
IMC_LOCK                NOT LOADED  lscparams.py    18:43 Mon 16mar2026    16:55 Tue 10mar2026
INIT_ALIGN              NOT LOADED  ISC_library.py  16:55 Tue 10mar2026    08:02 Tue 03mar2026
                        NOT LOADED  lscparams.py    18:43 Mon 16mar2026    08:02 Tue 03mar2026
ISC_DRMI                NOT LOADED  ISC_DRMI.py     07:57 Tue 17mar2026    18:43 Mon 16mar2026
LASER_PWR               NOT LOADED  ISC_library.py  16:55 Tue 10mar2026    08:03 Tue 03mar2026
                        NOT LOADED  lscparams.py    18:43 Mon 16mar2026    08:03 Tue 03mar2026
LOCKLOSS_SHUTTER_CHECK  NOT LOADED  lscparams.py    18:43 Mon 16mar2026    08:02 Tue 03mar2026
OMC_LOCK                NOT LOADED  ISC_library.py  16:55 Tue 10mar2026    08:03 Tue 03mar2026
                        NOT LOADED  lscparams.py    18:43 Mon 16mar2026    08:03 Tue 03mar2026
SEI_CONF                NOT LOADED  ISC_library.py  16:55 Tue 10mar2026    08:02 Tue 03mar2026
                        NOT LOADED  lscparams.py    18:43 Mon 16mar2026    08:02 Tue 03mar2026
SEI_ENV                 NOT LOADED  ISC_library.py  16:55 Tue 10mar2026    08:03 Tue 03mar2026
                        NOT LOADED  lscparams.py    18:43 Mon 16mar2026    08:02 Tue 03mar2026
SQZ_FC                  NOT LOADED  ISC_library.py  16:55 Tue 10mar2026    08:03 Tue 03mar2026
                        NOT LOADED  lscparams.py    18:43 Mon 16mar2026    08:03 Tue 03mar2026
SQZ_MANAGER             NOT LOADED  ISC_library.py  16:55 Tue 10mar2026    08:03 Tue 03mar2026
                        NOT LOADED  lscparams.py    18:43 Mon 16mar2026    08:03 Tue 03mar2026
SUS_CHARGE              NOT LOADED  lscparams.py    18:43 Mon 16mar2026    08:02 Tue 03mar2026
TCS_ITMX_CO2_PWR        NOT LOADED  lscparams.py    18:43 Mon 16mar2026    08:03 Tue 03mar2026
TCS_ITMY_CO2_PWR        NOT LOADED  lscparams.py    18:43 Mon 16mar2026    08:03 Tue 03mar2026
TEST                    NOT LOADED  lscparams.py    18:43 Mon 16mar2026    12:07 Tue 10mar2026
THERMALIZATION          NOT LOADED  lscparams.py    18:43 Mon 16mar2026    08:02 Tue 03mar2026
TMS_SERVO               NOT LOADED  ISC_library.py  16:55 Tue 10mar2026    08:03 Tue 03mar2026
                        NOT LOADED  lscparams.py    18:43 Mon 16mar2026    08:03 Tue 03mar2026
VIOLIN_DAMPING          NOT LOADED  ISC_library.py  16:55 Tue 10mar2026    08:02 Tue 03mar2026
                        NOT LOADED  lscparams.py    18:43 Mon 16mar2026    08:02 Tue 03mar2026
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HAM7 beam aligned to HAM6

Kar Meng, Sheila

This afternoon we aligned the squeezer beam to AS_C, AS_A, and AS_B QPDs.  This is currently done with OM1, OM2, SRM, and ZM6 at the same alignment they were at in the end of O4.  That means that the beam location on ZM5 should be the same as it was at the end of O4 (75732).  With this alignment, we are using up most of the actuator range on ZM4, so we will either have to move ZM6 and the spot position on ZM5, or mechanically yaw ZM4.  We can't easily reach ZM5 with an IR card to check if the beam position on it is centered, if we can find a way to get an IR card on a long stick to asses that centering that would be helpful.  

As part of this, we set up alignment loops from AS_A to ZM4 and AS_B to ZM5, they are slow but reliable.  I will attach a screenshot of settings here tomorow.

We also checked the alignment of the beam onto the CLF FIBER rejected PD, which was off because the fiber collimator was tilted to realign the the new OPO cavity axis.  Kar Meng adjusted the pitch of the TFP, then slid the PD to center the beam in yaw, and lastly yawed the PD to make sure the reflection was going nicely to the black glass V.