Displaying reports 81-100 of 86863.Go to page 1 2 3 4 5 6 7 8 9 10 End
Reports until 08:21, Tuesday 03 March 2026
H1 CDS
david.barker@LIGO.ORG - posted 08:21, Tuesday 03 March 2026 - last comment - 08:28, Tuesday 03 March 2026(89329)
Guardian rebooted

WP13054 h1guardian1 reboot

Ryan S, Dave:

At 07:59 PST we rebooted h1guardian1. This was a maintenance reboot, it had been running for 74 days (since 19dec2025). No changes to the OS were made. 

18 nodes had been pending loading the modified ISC_library.py common file. Ryan had checked that none of these nodes were using the modified section of this file.

There were no problems with the reboot and restart of the 176 guardian nodes.

ALIGN_IFO       NOT LOADED  ISC_library.py  13:08 Tue 24feb2026    13:12 Fri 19dec2025
ALS_COMM        NOT LOADED  ISC_library.py  13:08 Tue 24feb2026    13:11 Fri 19dec2025
ALS_DIFF        NOT LOADED  ISC_library.py  13:08 Tue 24feb2026    13:11 Fri 19dec2025
ALS_XARM        NOT LOADED  ISC_library.py  13:08 Tue 24feb2026    13:12 Fri 19dec2025
ALS_YARM        NOT LOADED  ISC_library.py  13:08 Tue 24feb2026    13:11 Fri 19dec2025
CAMERA_SERVO    NOT LOADED  ISC_library.py  13:08 Tue 24feb2026    13:11 Fri 19dec2025
H1_MANAGER      NOT LOADED  ISC_library.py  13:08 Tue 24feb2026    13:34 Fri 19dec2025
INIT_ALIGN      NOT LOADED  ISC_library.py  13:08 Tue 24feb2026    13:11 Fri 19dec2025
ISC_DRMI        NOT LOADED  ISC_library.py  13:08 Tue 24feb2026    13:12 Fri 19dec2025
ISC_LOCK        NOT LOADED  ISC_library.py  13:08 Tue 24feb2026    13:12 Fri 19dec2025
LASER_PWR       NOT LOADED  ISC_library.py  13:08 Tue 24feb2026    13:11 Fri 19dec2025
OMC_LOCK        NOT LOADED  ISC_library.py  13:08 Tue 24feb2026    13:12 Fri 19dec2025
SEI_CONF        NOT LOADED  ISC_library.py  13:08 Tue 24feb2026    13:11 Fri 19dec2025
SEI_ENV         NOT LOADED  ISC_library.py  13:08 Tue 24feb2026    13:12 Fri 19dec2025
SQZ_FC          NOT LOADED  ISC_library.py  13:08 Tue 24feb2026    13:11 Fri 19dec2025
SQZ_MANAGER     NOT LOADED  ISC_library.py  13:08 Tue 24feb2026    09:21 Tue 23dec2025
TMS_SERVO       NOT LOADED  ISC_library.py  13:08 Tue 24feb2026    13:11 Fri 19dec2025
VIOLIN_DAMPING  NOT LOADED  ISC_library.py  13:08 Tue 24feb2026    13:11 Fri 19dec2025
 

Images attached to this report
Comments related to this report
ryan.short@LIGO.ORG - 08:28, Tuesday 03 March 2026 (89334)
Link

After the reboot, there were a handfull of nodes I requested to different states:

  • IMC_LOCK -> OFFLINE
  • SEI_ENV -> MAINTENANCE
  • SEI_BS -> ISI_DAMPED_HEPI_OFFLINE
  • IFO_NOTIFY -> IDLE
  • PEM_MAG_INJ -> DOWN
  • SUS_CHARGE -> DOWN
  • All SUS nodes -> their requested state (this just "greens up" the nodes since they have no initial request, but the suspensions were all still in their correct mis/alignments)

All other nodes I left either to their initial requests or INIT, which is how they come up by default.

LHO General
ryan.short@LIGO.ORG - posted 07:34, Tuesday 03 March 2026 - last comment - 08:27, Tuesday 03 March 2026(89328)
Ops Day Shift Start

TITLE: 03/03 Day Shift: 1530-0030 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, 4mph 3min avg
    Primary useism: 0.02 μm/s
    Secondary useism: 0.15 μm/s 
QUICK SUMMARY: HAM1 pumpdown had to be stopped last night and will be restarted this morning. Cable pulling, cleanroom moves, and a reboot of the Guardian machine are also planned for today.

Comments related to this report
david.barker@LIGO.ORG - 08:27, Tuesday 03 March 2026 (89333)
Link

ham1 trend

Images attached to this comment
H1 AOS (CDS)
erik.vonreis@LIGO.ORG - posted 05:24, Tuesday 03 March 2026 (89327)
Workstations updated

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

LHO VE (VE)
gerardo.moreno@LIGO.ORG - posted 00:20, Tuesday 03 March 2026 - last comment - 15:54, Friday 06 March 2026(89326)
HAM1 Pump Down

(Travis S., Gerardo M.)
Pumpdown was started this morning, sorry no blowdown data.  By the time I remembered to take the reading there was no more pressure inside the chamber.  Travis connected all of the equipment while I wrestled with the viewport inspection.
Pumpdown was started without an issue.  We started with the scroll pump from the super sucker 500, the scroll pump of the SS500 cart brought the pressure down to 3.7x10-01 Torr, then we switched the cart to start pumping with the turbo pump/scroll pump.  We had one trip of the system, usually due to a time out, but it only took a restart of the turbo pump and the pumpdown to continue.
Unfortunately the pumpdown had to be stopped at 8:00 PM local time, with a pressure of 4.0x10-05 Torr, at that pressure the set points had not activated on the SS500 cart controller, the set points are hard set and can't be modified from the SS500 controller screen.
Pumpdown will be restarted tomorrow morning.

Note, on the attachment, regarding the screens, no set points for channel 1.

Images attached to this report
Comments related to this report
gerardo.moreno@LIGO.ORG - 15:54, Friday 06 March 2026 (89410)VE
Link

Pumpdown Update.

Last Tuesday, HAM1 pumpdown was stopped for a few minutes to move the SS500 cart, the cart was moved away from the -Y door to open up space for the table. After the relocation of the SS500 cart the pumpdown for HAM1 was restarted.

On Thursday we assisted Filiberto with the installation of a "split" cabling for the high voltage interlock at HAM1 gauge.  Attached is a photo of the screen of the SS500 cart and its response to loosing gauge signal, the signal cable was removed from the vacuum gauge to install the "split".  I set valve control to "open" and the override to "override" on the SS500 cart to prevent it from tripping, it worked.  BTW, when the cart reported the Error-S it cleared the setpoints.  Once the cable was restored and we had a signal at the SS500 cart, the setpoints were restored manually.

Pumpdown continues, pressure is currently at 2.77x10-06 Torr, attached is a trend of the pumpdwon pressure.

Images attached to this comment
H1 CDS
jonathan.hanks@LIGO.ORG - posted 18:04, Monday 02 March 2026 (89325)
WP 13002 Migrate services to the new VM cluster continued

We migrated the last system to the new VM cluster and powered down cdsproxmox0, cdsproxmox1, cdsproxmox2, cdsfs0 cdsfs1.

Cdsfs0, cdsfs1 have been moved into the DTS to become part of a cluster there along with the old commvault machine.

cdsproxmox2 was a spare w2275 and Dave will be using that to support some of the upcoming work.

I'll close the work permit tomorrow after we pull cdsproxmox0 & 1 from the racks.

LHO General
ryan.short@LIGO.ORG - posted 16:30, Monday 02 March 2026 (89324)
Ops Day Shift Summary

TITLE: 03/03 Day Shift: 1530-0030 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Planned Engineering
INCOMING OPERATOR: None
SHIFT SUMMARY: HAM1's main volume is pumping down nicely as of this morning. Cable pulling and parts cleanup also took place out in the LVEA.
LOG:

Start Time System Name Location Lazer_Haz Task Time End
15:38 FAC Randy LVEA N Changing HAM1 cleanroom bolts 16:02
15:39 VAC Richard LVEA N Checking HAM1 annulus 15:41
15:53 FAC Kim, Nellie LVEA N Technical cleaning 17:30
16:55 EE Jackie LVEA N Pulling chassis from SUS-R7 17:02
16:55 VAC Travis LVEA N HAM1 pumpdown 19:30
17:22 FAC Nellie EY N Technical cleaning 18:07
17:37 FAC Kim EX N Technical cleaning 18:38
17:47 ISC Jennie, Masayuki LVEA N Parts cleanup at HAM6 18:42
17:57 VAC Gerardo LVEA N HAM1 pumpdown 19:31
18:11 ISC Elenna, Oli Optics Lab N BHD optics build (Elenna out @ 18:54) 19:59
18:51 SAF Richard LVEA N Checking on HAM1 19:10
20:35 SPI Jeff Opt Lab N Taking pictures 23:01
20:37 FAC Richard LVEA N Rebooting PSL environment controller 21:10
20:42 FAC Randy LVEA N Plugging in scissor lifts 21:15
20:46 ISC Elenna, Oli Opt Lab N BHD optics build 23:42
20:53 AOS Betsy LVEA N Putting away parts 21:18
21:24 ISC Jennie LVEA N Parts cleanup at HAM6 21:43
21:29 EE Fil, Marc LVEA N Pulling cables 21:39
21:30 ISC Camilla Opt Lab N Looking at parts 21:57
21:51 AOS Mitchell EX, EY N FAMIS checks 22:32
21:57 AOS Betsy Opt Lab N Checking parts 22:57
21:57 VAC Gerardo, Travis LVEA N HAM1 pumpdown Ongoing
22:39 EE Fil EY N Grabbing power supplies 23:38
22:44 SAF Richard LVEA N Looking for Travis 22:52
23:39 EE Marc, Fil LVEA N Pulling cables Ongoing
23:51 ISC Betsy, Jennie LVEA N Looking at parts at HAM6 00:05
00:06 ISC Elenna, Oli Opt Lab N BHD optics build Ongoing
H1 PSL
ryan.short@LIGO.ORG - posted 13:06, Monday 02 March 2026 (89322)
PSL 10-Day Trends

FAMIS 31127

Jason made a brief trip into the enclosure 4 days ago, which is seen in the usual places. Also, the differential pressure between the laser room and anteroom changed around that time. Nothing much else to report this week.

Images attached to this report
LHO General
ryan.short@LIGO.ORG - posted 07:38, Monday 02 March 2026 (89320)
Ops Day Shift Start

TITLE: 03/02 Day Shift: 1530-0030 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Planned Engineering
OUTGOING OPERATOR: None
CURRENT ENVIRONMENT:
    SEI_ENV state: MAINTENANCE
    Wind: 3mph Gusts, 0mph 3min avg
    Primary useism: 0.01 μm/s
    Secondary useism: 0.14 μm/s 
QUICK SUMMARY: The HAM1 annulus has been pumping over the weekend, and if that's reached a low enough pressure, then pumping can start on the HAM1 main volume today. A few decent-sized earthquakes rolled through overnight as well.

LHO VE
david.barker@LIGO.ORG - posted 10:23, Sunday 01 March 2026 (89319)
Sun CP1 fill

Sun Mar 01 10:09:25 2026 INFO: Fill completed in 9min 21secs

 

Images attached to this report
LHO VE
david.barker@LIGO.ORG - posted 10:12, Saturday 28 February 2026 (89318)
Sat CP1 Fill

Sat Feb 28 10:10:32 2026 INFO: Fill completed in 10min 28secs

 

Images attached to this report
H1 TCS
sophie.muusse@LIGO.ORG - posted 17:56, Friday 27 February 2026 (89315)
CHETA Updates

S. Muusse, G. Valente

Electronics integration

We are running into some issue with the linear translation stage and rotation stages which we can't operate through the medm. Both stages are operational when using a newport motor driver and when driven through directly through beckhoff into the CHETA chassis and motor driver chassis but havent been shown to work with the code taken from the CO2 rotation stages. Patrick has been looking through the software but we are yet to find the solution. Yesterday (02/26) we determined the motor power cables from the CHETA chassis to the motor driver chassis were crossed which was a possible source of this issue, however, this was consistent with the wiring in the motor driver chassis albeit unorthodox. We elected to modify the cables so they are wired conventionally and in turn changed the wiring in the motor driver chassis by switching the + and - wires at the back of the chassis where the power is outputted. Now internally  the black = positive and red = Negative which is unfortunate but the best solution. We have seen both stages work after this effort using the newport motor driver so we dont believe this is the issue. 

Setting up Table 2

Table 2 is in the process of being populated. Today we installed the PD system using the electronics to align the PDs and also have inserted the first telescope lens. Initially, when installing and aligning the PDs the PD power supply chassis was supplied with pos =+24 and gnd =0V instead of ±18V leading to both PDs outputing -11V. This fried the first transimpedence amp in the circuit board which we have now replaced with alot of help from Marc. Both PDs are now working and aligned on the table. 

Calibration and power budget on table 1

We measured the power after all optics, where the powermeter fit ,as well as the I[A]/P[W] relationship of the laser to calibrate laser power on the MEDM.
The min/max power that can be achieved using the waveplate in rotation stage and the 2 polariser was measured:
Min ≈20mW ,
Max = 1.44W 
Both powers were measured after the 2nd polariser. This corresponds to a maximum power which can be output off the table of 1.308W, which was measured after the last pickoff. 
I'll attach plots/ figures in the comments showing these measurements.

H1 CDS
jonathan.hanks@LIGO.ORG - posted 17:10, Friday 27 February 2026 (89314)
WP 13002 Migrate services to the new VM cluster

As part of WP 13002 we migrated more services from the old VM cluster to the new one.  The most visible one was migration of the dust monitor and weather station IOCs.

We waited to do this migration until the doors were back on to make sure the dust monitors did not disappear while they were needed.

We have one more VM to migrate, we will do that on Monday and then de-commission the old VM cluster and supporting file servers.

LHO General
ryan.short@LIGO.ORG - posted 16:44, Friday 27 February 2026 (89310)
Ops Day Shift Summary

TITLE: 02/28 Day Shift: 1530-0030 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Planned Engineering
INCOMING OPERATOR: N/A
SHIFT SUMMARY: Both doors and all viewports are now in place on HAM1 and the annulus is pumping down. Next week, after the main volume is at low enough pressure, we'll start commissioning the new JAC in with the rest of the IFO.
LOG:

Start Time System Name Location Lazer_Haz Task Time End
15:36 FAC Kim, Nellie LVEA N Technical cleaning 16:19
15:46 FAC Randy LVEA N Prep for HAM1 door 16:31
16:09 VAC Jordan LVEA N Isolate turbopump on BSC8 16:17
16:49 VAC Travis LVEA N HAM1 viewport and door prep 17:34
16:50 VAC Jordan LVEA N HAM1 viewport and door prep 17:34
16:50 FAC Kim, Nellie LVEA N Technical cleaning 18:03
17:10 SAF Richard LVEA N Checking in w/ VAC team 17:32
17:48 FAC Randy LVEA N Measuring cleanrooms in W-bay 19:48
17:54 SPI Jeff Opt Lab Local SPI fiber characterization 20:11
17:55 VAC Jordan, Mitchell LVEA N Prep for HAM1 cleanroom move (Mitchell out @ 18:11) 19:27
17:57 VAC Betsy, Travis LVEA N HAM1 door and cleanroom move (Betsy out @ 18:12) 19:27
18:25 TCS Sophie, Gabriele Prep Lab Local CHETA table work 18:45
18:49 FAC Kim LVEA N Technical cleaning 19:35
18:51 SAF Richard LVEA, CER N Safety checks in walls 18:58
18:54 TCS Sophie Prep Lab Local CHETA table work 20:03
20:22 SPI Jeff, Jim Opt Lab Local SPI fiber characterization (Jeff out @ 23:30) 23:38
20:29 FAC Randy LVEA N Craning scissor lift 21:10
20:37 VAC Jordan LVEA N Setting up HAM1 pump carts 21:38
20:42 VAC Travis LVEA N Setting up HAM1 pump carts 21:38
22:15 SQZ Sheila LVEA N Turning on SQZ laser 22:45
22:45 VAC Travis LVEA N Checking HAM1 pumps 23:03
22:54 TCS Gabriele, Sophie Prep Lab Local CHETA table work (Gabriele out @ 23:15) Ongoing
23:08 JAC Jennie, Keita LVEA N Checking parts, turning off JAC heater (Keita out @ 23:40) 00:08
00:23 ISC Elenna, Oli Opt Lab N Assembling optics Ongoing
H1 CDS
david.barker@LIGO.ORG - posted 16:35, Friday 27 February 2026 - last comment - 09:38, Monday 02 March 2026(89312)
CHETA slow controls chassis now connected to MSR chassis by copper the whole length

Richard, Marc, Jonathan, Erik, Dave:

On Monday 23rd the CHETA slow controls chassis was installed in the Vacuum Prep Lab (VPL). We connected its ECAT ethernet port to the MSR Beckhoff chassis AUX-1 port partially by copper (VPL to Rm163 into CUR) and partially by fibre (CUR CDS edge switch to MSR edge switch).

This appeared to work, but later we found out that the CDS core switch was complaining constantly of rapid movement of a MAC address on the ports used by CHETA. Further reading suggests ECAT does not strictly support unique MAC addresses per Beckhoff terminal, and it appears they may all have the same non-standard MAC address.

In addition, since Monday we have been seeing regular dropouts of the CUR network switch stacks, every 6 hours at 00:41, 06:41, 12:41 and 18:41 for about a minute apiece.

This afternoon we ran a long 148' cat5e ethernet cable from room 163 to the far end of the MSR. At 16:01 we routed the CHETA chassis connection to use this cable, we now have contiguous copper run between the two chassis.

This will fix the MAC movement issues on the CDS core, and time will tell if if fixes the CUR switch dropout.

Comments related to this report
david.barker@LIGO.ORG - 08:58, Saturday 28 February 2026 (89317)
Link

Initial reports suggest the 6-hourly drop outs of sw-cur-aux-stk has been fixed by this move.

daniel.sigg@LIGO.ORG - 09:38, Monday 02 March 2026 (89321)
Link

EtherCAT terminals do not have MAC addresses. Typically, the network adapter sends an Ethernet frame with its own Ether type that will flow through all terminals without being absorbed. Terminals will just read or write individual bits and bytes of this frame as it passes by, and eventually this frame will be reflected back to the adapter. This is called EtherCAT direct mode and has very good latency characteristics, but it is not comaptible with an IP based infrastructure.

H1 AOS
betsy.weaver@LIGO.ORG - posted 16:23, Thursday 26 February 2026 - last comment - 20:21, Friday 27 February 2026(89289)
HAM1 JAC Viewport window re-FirstContact cleaning 
Jordan and Camilla pulled the FirstContact from the JAC viewport in prep to install it on the -Y door.  Unfortunately the inner glass surface was still showing many dots of particulate so we decided to re-FirstContact clean it.  I poured on a new sheet and we are now letting it dry overnight.  Install will need to happen tomorrow after we pull the sheet and hopefully have better results.  This seems to be typical of FirstContact these days - needing to reapply a second time on numerous optics...
Comments related to this report
travis.sadecki@LIGO.ORG - 20:21, Friday 27 February 2026 (89316)
Link

The second application of FirstContact was peeled from the vacuum-side of the viewport this morning.  During the peel, the TopGun N2 ionizer output was at ~10 psi, with a follow-up TopGun pass at ~30 psi.  I observed no macroscopic particulate within the ~2.5 inch diameter of the FC coverage after removal.  At the edges of the FC sheet (the ~2.5 inch diameter centered on the viewport optic), I noted two "smudges" of FC film.  I removed these smudges with a small Contec swab dipped in reagent grade acetone.  Another ~1 mm droplet of FC was noted at the optic/mounting ring interface.  I also attempted to remove this with a swab/acetone wipe, but since it was in an interior corner, some FC remained where it had wicked into the interface.

The viewport was then installed on the HAM1 -Y door A2F3 flange.  Torquing of the CF flange and installation of the guillotine assembly went without a hitch.  We didn't do any cleaning to the in-air side of the viewport post-installation.  

X1 SUS
ibrahim.abouelfettouh@LIGO.ORG - posted 12:04, Monday 09 February 2026 - last comment - 15:10, Monday 02 March 2026(89087)
BBSS Put in Can

Randy, Ibrahim

Randy and I put the BBSS in the can today, as shown by pictures.

Following LLO's advice from their experiences in alog 79950, we were able to use the aluma lift to can the BBSS. What we did in order:

1. Strip locked-mass BBSS of all cables, check for looseness, bring alum-a-lift into position to lift BBSS from lifitng bars

2. Undo dog clamps to let lift take suspension load, ensure suspension is secured on the lift. Move BBSS out of test stand - as LLO said, very small clearance.

3. Prepare temporary platform for lift fork adjustment

4. Set BBSS on temporary platform - this part was successful but needed extra blocks to avoid interference with Y-bracks on the Lower Structure.

5. Adjust forks to be allow for canning without bottoming out, relift.

6. Put into wiped-down can and check for looseness. Rewipe, check for particulate and ensure secure fit

7. Close doors.

See pictures below.

Images attached to this report
Comments related to this report
corey.gray@LIGO.ORG - 09:32, Thursday 12 February 2026 (89132)EPO
Link

EPO taggin'.  

ibrahim.abouelfettouh@LIGO.ORG - 15:10, Monday 02 March 2026 (89323)
Link

Ibrahim, Randy

Randy and I opened the can to:

  • Take out BRDs - were left in but best to remove during the move to OSB and craning since they're somewhat fragile and can swing.
  • Insert D2300392 Transport Pads under Dummy - for safety during big move
  • Insert brackets to secure attachment between transport plate (attached to Lower Structure) and can.

See pictures below for each and another overall image.

We then buttoned the BBSS and tightened all screws. It is now ready for transport.

Images attached to this comment
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