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
================================================================================================

36 file(s) NOT LOADED
 

PSL Cooling Water pH Test - Monthly

FAMIS 28560

pH of PSL chiller water was measured to be between 10.0 and 10.5 according to the color of the test strip.

Tue CP1 Fill

Tue Mar 17 10:19:48 2026 INFO: Fill completed in 19min 44secs

Gap in plot is due to DAQ restart.

Well Pump Activation

The well pump was remotely activated on Friday 3/13 for approximately 18 minutes beginning at 8:45am PT for the purpose of ground water sampling.

T. Guidry

OPS Day Shift Start

TITLE: 03/17 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: CALM
    Wind: 16mph Gusts, 10mph 3min avg
    Primary useism: 0.03 μm/s
    Secondary useism: 0.29 μm/s 
QUICK SUMMARY:

IFO is in IDLE and ENGINEERING

Plan is to continue comissioning.

AS_B_RF_45 was rephased +90% yesterday and EVE OPS reports that this was not making things better. Thye tried both +-90% phase and reported that -90% worked better.

Workstations updated

Workstations updated and rebooted.  This was an os packages update.  Conda packages were not updated.

OPS MOnday EVE shift summary

TITLE: 03/17 Eve Shift: 2330-0500 UTC (1630-2200 PST), all times posted in UTC
STATE of H1: Planned Engineering
INCOMING OPERATOR: None
SHIFT SUMMARY: I'm not convinced that the +90 phasing was correct for AS_B_RF45, the non-stellar alignment is making it tough to tell. PRMI locked fairly easily althought I can't seem to fix the Pitch misalignment, DRMI isn't so kind. It struggles to lock for more than ~7 seconds at the end of the shift.
LOG:                                                                                                                                                                                                    

Start Time	System	Name	Location	Lazer_Haz	Task	Time End
23:40	TCS	Sophie	Cheta	yes	Cheta work	00:51

• RyanS and I saw MICH ASC seem (it didn't finish offloading and lost lock due to ALS locklosses) to work twice with a +90 phase on AS_B_RF45, later when I was trying alone it clearly took it in the wrong direction every time. I tried a -90 phase as well, which seemed to be working until it eventually pulls in the wrong direction and doesn't stop till it loses lock. The power is low so it doesn't have that much room for error. I tried touching up both PRM and the BS before engaging MICH_ASC with both -/+ 90 phases (and no phase) which did not work. -90 was more successful
• After maximizing PRMI as much as I could I moved on to struggling to lock DRMI, after it would lock I would try to max by hand then it would get unstable and shake sometimes as I was adjusting optics
• DRMI really didn't want to lock, the few times it did it lock for a few seconds it looked OK, a decent amount of pitch, it was also seemed unstable, the BS glitching wasn't helping.
• The alignment isn't great, it's definitely worse than it was on Friday, I haven't been able to touch it up enough
• NUC5 bottom monitor is having trouble connecting/seeing its display, NUC20 is really dim and so are some of NUCs on the left wall

OPS MOnday 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: Tony
CURRENT ENVIRONMENT:
    SEI_ENV state: CALM
    Wind: 17mph Gusts, 14mph 3min avg
    Primary useism: 0.04 μm/s
    Secondary useism: 0.25 μm/s 
QUICK SUMMARY:

• Testing MICH ASC, so far it seems to be working for PRMI
  • We rephased AS_B_RF45 by +90
• I'm trying to get up to CARM_OFFSET_REDUCTION

Monday OPS Day Shift Report.

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:

17:13 UTC GRB -Short E630194 H1 was in Idle.  
ITMX was moved to get better X arm light earlier today. Since then we have been able to Lock PRMI.
Sheila and Gabriele went and took some pictures of inside the HAM1 chamber, so keep an eye out for cool HAM1 pic filled alog.   
We can consistantly get PRMI to lock. The Ryans are currently working on getting mich ACS to work.

LOG:                                                                                                                                                                                                                                                                                        

Start Time	System	Name	Location	Lazer_Haz	Task	Time End
15:06	FAC	Randy	LVEA	N	Craning pedistols	15:44
15:17	FAC	Nellie & Kim	LVEA	N	Technical Cleaning	16:20
16:08	EE	Fil	LVEA	yes	Turning on Illuminator in HAM 1	16:23
16:21	FAC	Randy	LVEA west bey	N	Craning some more.	18:13
16:35	FAC	Kim & Nellie	LVEA	N	Technical Cleaning	17:04
16:36	OPS	LVEA IS Birfurcated HAZARD	HAM1	LOCAL	LVEA Bifurcated LASER HAZARD @ HAM1	18:17
16:40	SPI	Jeff & Jim	Optics Lab	Yes	Building SPI	23:04
16:47	ISC	Betsy & Sheila & Jennie W	HAM1	Yes	looking into HAM1 to find pointing issues.	18:47
17:04	FAC	Kim	Mid X	N	Technical Cleaning.	18:09
17:06	EE	Fil	LVEA Ham4	N	Pulling Cables.	18:36
17:10	TCS	Sophie	Cheta Lab	Yes	Cheta-ing	21:26
21:10	ISC	Sheila & Gabrielle	LVEA HAM1	yes	Photoshoot	22:10
21:21	SUS	Ibriham & Oli	LVEA	N	testing sus parts	21:44
22:30	VAC	Gerardo, Jordon	LVEA	N	getting a Vacuum cart	22:52
23:40	TCS	Sophie	Cheta	yes	Cheta work	00:10

QOSEM Flag Gluing

[Tom R, Ibrahim]

We glued 6x of the QOSEM flags, attaching the lens (D2500277) to the aluminium body (D2500253). This was done using a jig (D2600054) to ensure the lenses were aligned to the body of the flag. We used EP30.

Only a tiny drop of glue is required, and was applied directly to the lip of the body using a thin wire. The flags will be left to dry overnight before another batch of 6 will be glued.

The flag gluing yesterday was successful, with a strong joint and nothing obscuring the lens itself. We continued and glued another 6x flags up, and will do 6x more next week

March 2026 Wind Fence Inspection

I did the monthly wind fence inspection yesterday. No new issues. Damage to the one panel at EY seems stable, no damage noted at EX. 

PM1 LR BOSEM swapped in, and other HAM1 closeout work

Yesterday, ground loop checks revealed a new and random ground loop issue on the LR BOSEM of the Tip Tilt PM1 suspension (which has been installed and used in vac for a long while now).  This morning I worked to swap the BOSEM for a new one, reset the medm offset/gains and recentered.  Fil confirmed that the ground loop situation is now resolved on PM1.  In Corey's absence, I took a bunch of photos (won't be as good as his but here for posterity) of the chamber components as we see them before closing up.  I wiped down some of the under table surface as I could.  Jim and I both inspected for left behind items on and under the table.
BOSEM SN 263 is the problem OSEM removed, SN 229 was swapped in with OLV 28860.

Jim then removed the septum viewport covers (all 4)and unlocked the ISI.  Oli ran the final closeout TFs for PM1 (JM1 and JM3 were yesterday).  I revisited the closeout check sheet and we launched the door crew (Jordan, Randy, and FAC - thanks for jumping in due to others absences!).  1 door is on now and we are about to check that the JAC Refl beam goes through the viewport on the door as anticipated given the inaccuracy of the viewport simulator fixture.

JAC monday

We installed JM1, balanced it and aligned it. A beam dump was placed behind it though we could not see the transmission with 1W input.

After this, JAC locked with RF without any problem though the input was wobbly when the purge was up.

We searched for unexpected ghost beams (also with 1W input) and didn't find any.

We uninstalled many (but not all) temporary dog clamps and irises.

We revisited the IMC alignment because it's been off in PIT since Thursday or Friday. We locked JAC using dither (because we wanted to turn down the purge air). We enabled the IMC WFS just for MC optics and steered JM3, but weren't able to center the MC2 trans. Steering JM3 just made the IMC transmission worse while making not much impact on the desired degree of freedon (JM3 PIT -> MC2 trans YAW, JAM3 YAW -> MC2 trans PIT).

Tomorrow, we'll revisit the IMC alignment. We'll also measure the power coming into JAC TRANS PD as well as the actual transmission of JAC while locking it with RF so we can use JAC trans PD as the measure of the power into HAM1.

FYI, there are about 24 beam dumps now installed on this table.

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.