Testing Alog timestamps

This entry made at 16:27 PDT

ITMY ITMX and BS Oplev Trend since last DRMI

Attahed and in the table below are oplev positions for ITMY, ITMX and BS since last DRMI lock on 03/19/2026 at 11:02 PDT

	DRMI Locked Reference	Latest
	11:02 PDT 03/19/26	15:00 PDT 04/14/26
BS P Oplev	2.10	0
BS Y Oplev	-25.92	0
BS Sum Oplev	20215.30	19605.8
IX P Oplev	-10.70	-3.64
IX Y Oplev	5.10	-1.2
IX Sum Oplev	3188.52	4.7
IY P Oplev	-26.65	42.5
IY Y Oplev	-3.22	22.92
IY Sum Oplev	7904.27	4731.59

Note 1: The BS Oplev Damping loops were still on during some FARO work and were shaking the BS. We turned these off on morning of April 14.

Note 2: The right-most T-cursor marks the corner-station vent

A-Log server updated to Debian 12 - Bookworm

Alog server updated to Debian 12 Bookworm.

SVN will be completed tomorrow (4-15-2026)

WP 13174 updated h1dmt login server to Debian 13.

As per WP 13174 I updated the OS on the h1dmt login system to debian 13.  No DMT/GDS services were changed, only the login box.

Changed fibre for EX HWS

Madi, Camilla, TJ 

• Had a look with the card at both the HWS beam and the ALS back reflection in the HWS line
  • Both 50um and 200um fibre attached
• Took power-meter measurements
• For 50um fibre, only ~20uW out of the collimator, and lower than ambient light coming back to HWS camera
• For 200um fibre, 247uW out of collimator
• 14.45uW of ALS at HWS camera
• 78.6nW of HWS at HWS camera
• 49.3nW measured with no beam on HWS camera
• Also misaligned ETM, and watched the ALS beam, and the HWS beam move off the HWS camera, confirming that what we were seeing was indeed returned light from the ETM
• With the HWS beam, there was an artefact that didn't move with the ETM misalignment - theorise this is a stray beam reflection from optics on the table onto the HWS camera
• The return ALS beam is very strangely shaped - before labelled the 'mickey mouse ears'. To me it looked like a 1,0 mode, but with one lobe larger than the other. Interested to see how much similar the HWS return is to that shape?
• Checked HWS alignment towards ETM - pretty bad, not very centred. Off in pitch and yaw
• Checked co-alignment of HWS and ALS towards HWS camera - not great

OPS Day Shift Summary

TITLE: 04/14 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Planned Engineering
INCOMING OPERATOR: None
SHIFT SUMMARY:

IFO is in IDLE for MAINTENANCE

Very productive day in which BSC2 FARO work continued (and is ongoing but almost done). Cleanroom was moved to the biergarten. Prep for dome removal finalized. CEBEX was on-site at MY.

LOG:

Start Time	System	Name	Location	Lazer_Haz	Task	Time End
14:55	FAC	bubba, C&E	MY	N	Trenching?	01:55
14:55	FAC	Kim, Nellie	LVEA	N	Technical Cleaning	15:37
15:14	FAC	Chris + Pest-guys	LVEA, Tubes	N	Debugging	19:14
15:15	IAS	Ryan C	LVEA	N	Warming FARO	15:23
15:29	FAC	Randy, TJ	LVEA	N	Garb room location inspection	15:43
15:36		Camilla	Optics Lab	N	Inspecting optics	19:23
15:37	FAC	Kim, Nellie	LVEA	N	Technical cleaning	16:22
15:44	FAC	Randy	LVEA	N	Moving stuff around	16:21
16:04	CC	TJ, Jordan	LVEA	N	Check out garbing situ	16:11
16:12	VAC	Jordan	LVEA	N'	Vacuum inventory	16:14
16:16	EE	Fil, Corey	LVEA, FCES'	N	West Bay cameras	19:04
16:17	IAS	Jason, Ryan C	LVEA	N	FARO BSC2	00:07
16:21	SEI	Jim	LVEA	N	Locking ITM Baffles	18:37
16:34	VAc	Jordan	LVEA	N	cp1 staging parts	20:49
16:43	ICS	Jeff	Optics Lab	N	Searching for part	17:30
16:44	FAC	Randy	LVEA	N	Craning clean room	17:40
16:44	FAC	TJ	LVEA	N	Craning clean room	17:40
16:50	VAC	Gerardo	LVEA	N	Cleanroom move	17:29
17:02	VAC	Travis	LVEA	N	Checking on Gerardo and Jordan	20:01
17:21	Marc	Marc	EX	N	Swapping power supply	19:02
17:42	FAC	Randy	EX, EY	N	Looking for a spreader bar	19:47
18:03	FAC	Kim	LVEA	N	Technical Cleaning	19:02
19:13	epo	jennie.disha.guest	lvea	n	lvea tour	19:47
19:15	pem	robert	EX	-	grounding studies	00:03
19:36	fac	randy.tyler	EY	-	grabbing bsc spreader bar	20:37
20:34	ee	fil	MER	-	pull sus cables	23:34
20:50	sei	jim	bsc2	-	stickman duties for FARO	23:36
20:56	OPS	TJ	LVEA	N	Battery delivery	21:01

Camera installed in West Bay

WP 13172

A PTZ camera was installed on the cable tray support near the LY Vacuum rack. Camera is connected to the FCES juniper switch (Access, port 12) via fiber to network converters. This will help document BSC2 dome and cartridge removal.

F. Clara, C. Gray, R. McCarthy

Tue CP1 Fill

Tue Apr 14 10:11:00 2026 INFO: Fill completed in 10min 57secs

 

PSL Status Report Weekly FAMIS 39759

Closes FAMIS39759, last checked in alog89772

Laser Status:
    NPRO output power is 1.835W
    AMP1 output power is 70.55W
    AMP2 output power is 138.1W
    NPRO watchdog is GREEN
    AMP1 watchdog is GREEN
    AMP2 watchdog is GREEN
    PDWD watchdog is GREEN

PMC:
    It has been locked 3 days, 22 hr 40 minutes
    Reflected power = 27.2W
    Transmitted power = 104.0W
    PowerSum = 131.2W

FSS:
    It has been locked for 3 days 22 hr and 40 min
    TPD[V] = 0.4879V

ISS:
    The diffracted power is around 4.0%
    Last saturation event was 0 days 0 hours and 0 minutes ago

Possible Issues:
    PMC reflected power is high

Following IO Chassis Timing Card Firmware Upgrades all Duotone times are now sub 1 microsecond

The completion of the Timing Card Firmware upgrade has brought all the IOP Duotone timings to below 1uS (were in the 7uS region).

Duotone times are now either around 0.0uS or around +0.5uS due to a board manufacture variation.

OPS Day Shift Start

TITLE: 04/14 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: 18mph Gusts, 13mph 3min avg
    Primary useism: 0.02 μm/s
    Secondary useism: 0.10 μm/s 
QUICK SUMMARY:

IFO is in IDLE for MAINTENANCE

FARO BSC2 work, prep for BSC2 dome removal, CDS work and cabling are expected activities today.

Reset SWWD following EQ Monday night

An earthquake tripped the SWWDs for ETMY, ITMX and ETMY at 18:30 PDT yesterday evening. I untripped these 07:40 this morning.

Ops Monday Morning report

TITLE: 04/14 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Planned Engineering
INCOMING OPERATOR: None
SHIFT SUMMARY:

Iluminators for HAM3 BSC1 and 2 are now on.
HEPI and ISI for BSC2 is locked out. tagging PEM. and there is now a Red H1:SYS-ETHERCAT_DEVICE_1_SLAVECOUNTACTUAL due to the iluminator Chassis device that Fil turned on between BSC1 and BSC1 in the beergarden to allow the illuminators to turn on. tagging CDS. 

PCAL troubleshooting: 
Dripta and I were trying to take FFT's of PCAL Lines for more Power budget work and we noticed that the PCAL Y laser is off with no current on H1:CAL-PCALY_LASERDIODECURRENT. I trended the channel back and compared it with some channels that I thought may link it to the IOP restarts. 
Dripta went to EY to toggle the Laser power rocker switch just in case it was just a simple issue of a turn it off and back on again.  Tagging CDS again.

I noticed that MC1 & 3 were saturating. 
IMC H1:IMC-WFS_GAIN was set to 0 and the history was cleared to solve the problem of MC1 & MC3 were being saturated.
Trending some channels that were suspected to perhaps  be the cause of the junk signal and thus the cause of the saturations.
The IMC ASC has it's own block to do power normalization, different from the LSC power normalization. The output of this block is "INNORM" used to normalize MC2 NSUM for the IMC WFS triggering.
Relavent FRS ticket: 
https://services1.ligo-la.caltech.edu/FRS/show_bug.cgi?id=9387

More IOP model restarts happening again for HAMS 7,8 then HAM 5,6, & BSCs 1,2, & 3.
Please see the attached SDF Diffs for HAMs 5, 6 and the BS: 
SUSSR3
SUSRM
SUSIFOOUT
SUSSQZOUT
SUSBS (my bad I had sort on substring selected with an old Optical Align string in the search field.)
All SDFs were accepted before the IOP restart. 
ITMS  IOPs have not been rebooted yet. Tagging SUS, SQZ & ISC

MC2_trans Beam Dump twas Twissled today, then put back into original place. 

The ITMs had their IOP's restarted after a time cable swap today as well.
All SUS were turned back to Aligned.
SEI for HAM 2,3,4  and BSC 1 & 2 still have their HEPI's and or their ISI's WD tripped or other wise in a ISI Damped Hepi offline state.

As you can see from this ITMY trend, Jim went inside to lock the ISI and tripped the ISI, then Jason went in and tripped it again, then there was an IOP restart. 

A slightly less exciting trend of ITMX.


LOG:
 

Start Time	System	Name	Location	Lazer_Haz	Task	Time End
14:47	FAC	Randy	LVEA	n	Prep for dome removal and other moves	16:06
15:09	FAC	Kim, Nelly	LVEA	n	Tech clean - HAM3, Biergarten	16:07
15:47	FAC	Randy	LVEA BSC2	N	Working on removing BSC2 Dome	16:06
16:07	VAC	Randy	MID Y	N	Picking up matieral	17:53
16:09	FAC	Nellie	Mid & End Y	N	Technical cleaning & Resupply	18:09
16:13	SEI	Jim & Ibrahim	LVEA BeerGarden	N	Locking Hepi , ISI on BSC2	18:05
16:26	FAC	Kim	LVEA Output Arm	N	Technical Cleaning & Resupply	17:40
16:33	CBEX	Tyler's C&E Trentching	Mid Y	N	trenching for CBEX Building	02:33
16:41	VAC	Gerardo	LVEA BSC2	N	Removing Vac Equipment from BSC2 dome	18:10
16:43	IAS	Jason	LVEA	N	Warming up the FARO system	17:13
17:25	CHETA	Camilla	Optics Lab	n	Grabbing optics.	18:26
17:36	VAC	Jordan	LVEA BSC2	N	Helping Gerado	18:10
17:38	EE	Fil & Corey	LVEA	N	Setting up cameras and turning on Illuminators	19:38
18:11	PCAL	Dripta & Disha	EY	N	Power Cycling PCAL laser	19:02
18:29	IAS	Jason & Crouch	LVEA HAM3 to BSC1&2	N	FARO surveying HAM3 & BSCs	19:57
19:37	IAS	Ibrahim	LVEA BeerGarden	N	DeBaffling	19:53
19:41	VAC	Randy	LVEA BeerGarden	N	BSC2 Dome removal prep	20:02
19:51	EE	Marc & Erik	HAM Shaq & HAM7	N	Swapping power supply Power cables inside chassis	20:23
19:58	PEM	TJ	EX	N	Checking Dust Mon Pump	20:29
20:30	TCS	Camilla & Maddi , TJ	EX	Yes	Hartman troubleshooting &work	22:05
21:01	IAS	Jason & Ryan, Jim, Ibrahim	LVEA HAM3, BSC1&2	N	Faro work inside the Vac chambers	00:05
21:43	VAC	Gerardo & Jordan	LVEA HAM1	N	taking parts off of HAM1	22:38
22:12	IAS	Sheila	LVEA Ham3	N	Helping with Faro work	22:38
23:19	IAS	TJ	Optics Lab & LVEA	N	looking for a Class B Ruler in mm.	23:49

CDS Maintenance Summary: Monday 13th April 2026

WP13110 Upgrade IO Chassis Timing Card Firmware and Sync Ribbon

Marc, Erik, Jeff, Tony, Dave:

The following IO Chassis were upgraded today: h1cdsh8, h1susb13, h1sush[12,56,6,7], h1seib[1,2,3], h1seih[23,45].

Models were rebuilt against RCG5.5.2 for: h1cdsh8, h1seib[1,2,3], h1seih[23,45], h1sush[56,7]

This completes the IO Chassis TC upgrades. T2600143 has been updated.

Restore h1hwsey Hartmann Wavefront Sensor Computer

TJ, Jonathan, Dave:

Last Friday I got the h1hwsey computer running again. This afternoon TJ started the HWS ETMY software on it. Just prior to this Jonathan and I stopped and disabled the dummy IOC which had been running on cdsioc0 since dec2025.

h1hwsey powered up, not running code at this moment

TJ, Dave:

TJ would like to get h1hwsey running again. If memory serves, this did not come back after the 06dec2025 site power outage and at the time it was not needed so we did not investigate it further and instead ran the h1hwsetmy_dummy_ioc.service on cdsioc0 (alog88435) to green the EDC.

At 16:00 this afternoon I went to EY and found that h1hwsey's boot disk caddy was not quite seated fully. This computer is not labeled, but can be verified by: tracing the KVM chan3 cable, checking PCIe camera receiver is installed.

I was able to monitor its reboot using the KVM console. I logged in as user controls and was able to ping the EX HWS machine to verify network operation.

Before I left I labeled the machine.

We are currently not running the IOC on h1hwsey and continue to run the dummy IOC on cdsioc0. We will keep this configuration for the weekend, and on Monday we'll stop the dummy IOC and run the real one.

IO Chassis Firmware and Sync Cable Upgrade

Per WP13110 we have upgraded the IO chassis listed below.
This link contains the asbuilt for all of the H1 IO Chassis: https://dcc.ligo.org/LIGO-D1301004
This link contains the ECR for the IO Chassis sync cable upgrade: https://dcc.ligo.org/LIGO-E2600069

This link is to the work in progress spreadsheet LHO Front Ends Upgrade Status

Corner:
SUSB2H34 has upgraded firmware and sync
SUSAUXB2H34 has upgraded firmware and sync
SEIH7 has upgraded firmware and sync
OMC0 has upgraded firmware and sync
OAF0 has upgraded firmware and sync
ASC0 has upgraded firmware and sync
LSC0 has upgraded firmware and sync