Displaying reports 1-20 of 81325.Go to page 1 2 3 4 5 6 7 8 9 10 End
Reports until 18:30, Thursday 03 April 2025
LHO VE
janos.csizmazia@LIGO.ORG - posted 18:30, Thursday 03 April 2025 (83738)
2025 April vent - VAC diary
Today's activities:

- HAM1's Y+ and Y- doors have been taken off (thanks to Tyler, Randy for the help in the door removal, and to Tony and Corey for breaking the bolts earlier)
- All 5 HAM1/HAM2 viewport covers have been installed
- The 16.5" flange was taken off from the top of HAM1 - this will be the basis of the new vacuum interlock gauge
- A high number of leak checking was done, in detail:
 - Y-manifold: Y+ X+ side flanges (3 pcs.); Turbo flange (1 pc.)
 - BSC8: Y+ X+ corner (3 pcs.); Y- X+ corner (3 pcs.); X+ HEPI bellows (2 pcs.); X+ collar 16.5" flanges (2 pcs.)
 - BSC8-BSC1 spool: Y+ X+ flanges (3 pcs.)
 - BSC1: Y+ X+ side flanges (3 pcs.); X+ collar flanges (2 pcs.); X+ HEPI bellows (2 pcs.); X+ door flanges (5 pcs.); Y- X+ side flanges (3 pcs.)
 - BSC2: Y+ X+ side flanges (3 pcs.)
 - BSC3: Y+ HEPI bellows (2 pcs.); Y+ X- side flanges (3 pcs.); Y+ collar flanges (2 pcs.); Y+ door flanges (5 pcs.); Y+ X+ side flanges (3 pcs.)
 - HAM2-HAM3 spool: vent port (1 pc.); X- flanges (11 pcs.); Y- side flanges (2 pcs.); X+ Y- flanges (5 pcs.)
 - HAM3: Y- door flanges (5 pcs.)
LHO General
tyler.guidry@LIGO.ORG - posted 16:38, Thursday 03 April 2025 (83737)
Water Leak
Beginning early last week water usage, specifically what is delivered to the buildings following treatment, spiked. Not only was our consumption far outside of our normal usage during operating hours, but it was significantly higher than we would expect in off hours/weekends. After tracking burn rates, I calculated an average continuous flow of ~1.25gpm. 

With the help of the operator core and Richard, Facilities began the process of trying to determine the source of the lost water. This usually means site walks both inside and out looking for running water/stuck valves/wet areas. Persistent rain was no help in determining a potential source outside and there was no apparent continuous/suspect flow inside. Given that, we began the process of elimination by isolating water supply to individual buildings. We began with the staging and VPW which share a shutoff valve but to no avail. The same was done at the LSB and LExC yielding the same result. Head scratching continued and I eventually stumbled upon a small wet area of asphalt just outside the Carpenter Shop near the potable water holding tank. It was not immediately clear to me that this would be the source of the leak since the rain was still intermittent and the presence of water was pretty unsuspecting given what we have likely put in the ground in that area. So, I snapped a photo and kept an eye on this area in the coming days. Each day that went by the spot did not dry and actually grew larger. At this point it is clear that the water leak is beneath the asphalt and judging by the as-built drawings is probably a failed 45 deg joint. 

Beginning early next week the asphalt will be removed and the surrounding area will be vacuumed out as opposed to dug so as not to have to interrupt the supply of high volts to the chillers etc. Once the failed area is identified potable supply will have to be cut off to the entire site while repairs take place.

E.  Otterman R. McCarthy C. Soike T. Sanchez T. Guidry 

Images attached to this report
H1 SYS
betsy.weaver@LIGO.ORG - posted 16:22, Thursday 03 April 2025 (83736)
Progress of Vent work this week
Images attached to this report
H1 AOS
filiberto.clara@LIGO.ORG - posted 15:48, Thursday 03 April 2025 (83735)
HEPI Upgrade Preparation

WP 12408
ECR E2200043

Beckhoff electronics for the HEPI Controller Upgrade are now installed in the MER. Power and network cables were pulled from the Mechanical Room vacuum rack. Power to the electronics is on the vacuum UPS. Field cables to BSC2 are now terminated. Modifications to the motor control panel are still required. They will be done concurrently with the software updates as HEPI needs to be taken offline. Date for upgrade TBD.

Images attached to this report
H1 PEM
ryan.crouch@LIGO.ORG - posted 15:40, Thursday 03 April 2025 (83734)
BSC8 dust monitor

I noticed that the 500nm counts were stuck so I restarted the dust monitor (didn't fix the stuck value), and restarted the IOC but it didn't come back after the restart, the dust monitor isn't writing 2 values correctly it seems? I might have to swap this to another dust monitor, I don't have any more spare pumped dust monitors so I think I would want to take one of the 2 currently in stagings' ground floor if possible. I also double checked that all the settings on the actual device were the same as the others. The 0.3 RAW counts seem to be still working confusingly.

The reported error is as follows

2025/04/03 15:16:59.169508 gt521s1 H1:PEM-CS_DUST_LVEA10_300NM_RAW_IN: Input "    ,   ,010,060,000..." does not match format "%*[-0-9]*[:0-9]*ff*f*f*f"

 

H1 CDS (ISC)
filiberto.clara@LIGO.ORG - posted 15:25, Thursday 03 April 2025 (83732)
HAM1 ASC RELF WFS Cabling

WP 12438
Rack Layout D1001425

RF cables for ASC REFL WFS were pulled to HAM1 flange D6. Cables need to be dressed into the ISC-R2 rack. Some electronics in ISC-R2 were moved to make room for a delay line and 2-Ch Demodulator. Delay line chassis is installed. Demodulator chassis is being assembled at CIT. Existing coaxial cables need to be tested for delay phase before being pulled out and re-terminated. At this time some patch panel work in ISC-R2 will also be done.

F. Clara, M. Pirello, T. Sanchez, D. Sigg

H1 SEI
jim.warner@LIGO.ORG - posted 14:25, Thursday 03 April 2025 (83730)
HAM1 ISI refit mostly done, will switch containers next week

FInished updating the sensors for HAM1 ISI in the staging building. New CPS seem to be alive and noise is within spec, considering the state the ISI is in (on storage container base and locked). TMDs and vertical L4Cs will be added in chamber. We will swap to the narrower transport base next week in prep for moving to OSB. I will post asds for cps soon, screenshot isn't working on this laptop.

LHO General
ibrahim.abouelfettouh@LIGO.ORG - posted 14:12, Thursday 03 April 2025 - last comment - 18:46, Thursday 03 April 2025(83729)
OPS Day Shift Summary

TITLE: 04/03 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 PLANNED ENGINEERING for VENT

Extremely productive day in which the following tasks were completed:

Attached is a photo of the most recent SUS/SEI guardian configurations.

Oli is taking over the shift for the remaining 2 hours.

LOG:

Start Time System Name Location Lazer_Haz Task Time End
14:38 FAC Randy LVEA N Laying down ameristat HEPI grout areas 16:19
14:49 FAC Chris LVEA N Giving Randy tape at HAM1 17:30
14:49 FAC Kim LVEA N Technical cleaning 17:32
14:49 FAC Nellie LVEA N Technical Cleaning 16:37
14:51 FAC Tyler LVEA N Forklift moving 14:52
15:15 VAC Jordan LVEA N Pump check 15:22
15:54 FAC Jordan LVEA N Continue leak checking 19:06
16:15 VAC Travis LVEA N Leak Checks 19:21
16:16 ISC Sivananda Optics Lab Local ISS Array work 19:03
16:16 ISC Mayank Optics Lab Local ISS Array Work 19:03
16:17 AOS TJ LVEA N Corner station dust monito 16:43
16:19 FAC Tyler, Tony LVEA N Moving cleanroom 17:30
16:38 SEI Fil LVEA N HAM1 Cable Work 17:55
16:44 EE Marc LVEA N HAM1 Cable Work 18:00
16:55 PEM TJ LVEA N Checking dust monitor 17:31
17:05 AOS Betsy LVEA N Walkabout 17:29
17:12 ISC Rahul Optics Lab Local ISS Array Work 19:03
17:15 FAC Tyler LVEA N Taking HAM1 -Y Door Off 19:21
17:27 FAC Richard LVEA N Walkabout 17:29
17:27 ISC Jennie Optics Lab Local ISS Array Work 19:03
18:06 AOS Ibrahim LVEA N Checking progress; delivering parts 18:13
18:07 CDS Fil LVEA/MER N Prep HEPI pump upgrade; terminating cables 21:15
18:29 PCAL Tony PCAL Lab y(local) PCALin' 19:23
18:40 EPO Mike, Dutch Envoy, Betsy, Richard LVEA N Walkabout 19:21
19:16 ISC Daniel LVEA N Looking at racks 20:05
19:58 EE Fil LVEA n Electronics rack work 21:58
20:19 VAC Travis LVEA N HAM1 viewport covers 22:19
20:22 IAS Jason, Ryan LVEA N FARO Work 20:35
20:24 SUS Mayank, Sivananda, Betsy LVEA N HAM1 Work 21:24
20:41 VAC Gerardo LVEA N HAM1 Work 21:41
20:48 VAC Janos, Jordan LVEA N Leak Checks 21:48
20:50 FAC Jackie, Richard LVEA N Walkabout 20:58
Images attached to this report
Comments related to this report
oli.patane@LIGO.ORG - 18:46, Thursday 03 April 2025 (83739)

Other stuff that happened today:                                                                                                                                                                                                                                                                        

Start Time System Name Location Lazer_Haz Task Time End
21:11 EPO Mike, Dutch Envoy EY N Diplomacy 22:03
21:28 PEM RyanC LVEA NN Check on DM10 21:34
21:50 PEM RyanC LVEA N Check on DM10 again 21:55
22:07 PEM RyanC LVEA N Third time's the charm 22:18
22:50 PCAL Tony PCAL Lab y(local) Setting up a measurement 23:01
23:02 EPO Camilla, Matt, tour LVEA n Tour 23:37
23:24 tour Ibrahim, +1 LVEA n tour 23:42
23:43 ISC Mayank, Siva OpticsLab y(local) ISS Array 23:57
23:44 ISC Rahul OpticsLab y(local) ISS Array (in 1 hour before) 23:44
00:59 PCAL Tony PCAL Lab y(local) Closing sphere apetures 01:04
H1 TCS
matthewrichard.todd@LIGO.ORG - posted 13:24, Thursday 03 April 2025 (83728)
Starting L5L CO2 Laser setup to test QPD path for CHETA

M. Todd, C. Compton


We started setting up the Access CO2 laser in the optics lab, and after confirming that the beam coming from the aperature has not changed since previous tests, we have begun installing optics to test a setup we are imagining for CHETA.


Figure 1 is the proposed setup to test the QPD path. The ITM in this setup will really just be a screen or block, and we may do some razor-blade profiles of it. The QPD should be at the same Gouy phase as the "ITM", and this model adheres to that. So far, we have installed three of the steering mirrors and encorporated their measured distances (aligned to the optics grid) to this model, as seen in Figure 2.

Here are the beam parameters at the relevant points in the model, which may be confirmed with profiles.

q at Laser.fr.o from BeamTrace:
+-----------+-------------------------------+----------+-----------+----------+------------------+-----------------------+
| direction |             q [m]             |  w [m]   |  RoC [m]  |  w0 [m]  | Accum Gouy [deg] | Dist. form source [m] |
+-----------+-------------------------------+----------+-----------+----------+------------------+-----------------------+
|     x     | -1.140000e-01 + 4.268000e-01j | 1.24e-03 | -1.71e+00 | 1.20e-03 |       0.00       |         0.000         |
|     y     | -1.140000e-01 + 4.268000e-01j | 1.24e-03 | -1.71e+00 | 1.20e-03 |       0.00       |         0.000         |
+-----------+-------------------------------+----------+-----------+----------+------------------+-----------------------+

q at QPDStop.fr.i from BeamTrace:
+-----------+-------------------------------+----------+-----------+----------+------------------+-----------------------+
| direction |             q [m]             |  w [m]   |  RoC [m]  |  w0 [m]  | Accum Gouy [deg] | Dist. form source [m] |
+-----------+-------------------------------+----------+-----------+----------+------------------+-----------------------+
|     x     | -1.723144e-01 + 4.141798e-02j | 1.60e-03 | -1.82e-01 | 3.74e-04 |      237.00      |         3.273         |
|     y     | -1.720586e-01 + 4.111144e-02j | 1.60e-03 | -1.82e-01 | 3.72e-04 |      237.02      |         3.273         |
+-----------+-------------------------------+----------+-----------+----------+------------------+-----------------------+

q at ITMStop.fr.i from BeamTrace:
+-----------+------------------------------+----------+----------+----------+------------------+-----------------------+
| direction |            q [m]             |  w [m]   | RoC [m]  |  w0 [m]  | Accum Gouy [deg] | Dist. form source [m] |
+-----------+------------------------------+----------+----------+----------+------------------+-----------------------+
|     x     | 1.451712e+00 + 2.808360e-01j | 5.13e-03 | 1.51e+00 | 9.73e-04 |      237.66      |         3.699         |
|     y     | 1.453071e+00 + 2.808360e-01j | 5.13e-03 | 1.51e+00 | 9.73e-04 |      237.67      |         3.699         |
+-----------+------------------------------+----------+----------+----------+------------------+-----------------------+

Images attached to this report
H1 SEI (SEI)
ibrahim.abouelfettouh@LIGO.ORG - posted 12:49, Thursday 03 April 2025 (83727)
SEI Seismometer Mass Position Check - Monthly FAMIS 26500

Closes FAMIS 26500. Last checked in alog 83228

It is worth noting that while all ISIs were in ISI_DAMPED_HEPI_OFFLINE and I did this task during lunch with minimal LVEA activity and untripped WDs, we are in a vent so values may not be nominal. Despite this, the outputs are still comparable to last month's with the same +-1 number of out-of-range STSs/T240s.

STS Centering

Averaging Mass Centering channels for 10 [sec] ...
2025-04-03 12:42:01.264160
There are 1 STS proof masses out of range ( > 2.0 [V] )!
STS EY DOF X/U = -2.34 [V]
All other proof masses are within range ( < 2.0 [V] ):
STS A DOF X/U = -0.623 [V]
STS A DOF Y/V = -0.678 [V]
STS A DOF Z/W = -0.626 [V]
STS B DOF X/U = 0.241 [V]
STS B DOF Y/V = 0.946 [V]
STS B DOF Z/W = -0.394 [V]
STS C DOF X/U = -0.801 [V]
STS C DOF Y/V = 0.799 [V]
STS C DOF Z/W = 0.612 [V]
STS EX DOF X/U = -0.052 [V]
STS EX DOF Y/V = -0.052 [V]
STS EX DOF Z/W = 0.067 [V]
STS EY DOF Y/V = -0.077 [V]
STS EY DOF Z/W = 1.291 [V]
STS FC DOF X/U = 0.19 [V]
STS FC DOF Y/V = -1.11 [V]
STS FC DOF Z/W = 0.653 [V]
Assessment complete.

T240 Centering

Averaging Mass Centering channels for 10 [sec] ...
2025-04-03 12:44:13.270291
There are 14 T240 proof masses out of range ( > 0.3 [V] )!
ETMX T240 2 DOF X/U = -1.086 [V]
ETMX T240 2 DOF Y/V = -1.059 [V]
ETMX T240 2 DOF Z/W = -0.718 [V]
ITMX T240 1 DOF X/U = -1.658 [V]
ITMX T240 1 DOF Y/V = 0.416 [V]
ITMX T240 2 DOF Z/W = 0.411 [V]
ITMX T240 3 DOF X/U = -2.126 [V]
ITMY T240 3 DOF X/U = -0.835 [V]
ITMY T240 3 DOF Z/W = -2.379 [V]
BS T240 3 DOF X/U = -0.504 [V]
BS T240 3 DOF Z/W = -0.355 [V]
HAM8 1 DOF X/U = -0.316 [V]
HAM8 1 DOF Y/V = -0.438 [V]
HAM8 1 DOF Z/W = -0.723 [V]
All other proof masses are within range ( < 0.3 [V] ):
ETMX T240 1 DOF X/U = -0.079 [V]
ETMX T240 1 DOF Y/V = -0.051 [V]
ETMX T240 1 DOF Z/W = -0.05 [V]
ETMX T240 3 DOF X/U = -0.021 [V]
ETMX T240 3 DOF Y/V = -0.154 [V]
ETMX T240 3 DOF Z/W = -0.047 [V]
ETMY T240 1 DOF X/U = 0.052 [V]
ETMY T240 1 DOF Y/V = 0.13 [V]
ETMY T240 1 DOF Z/W = 0.194 [V]
ETMY T240 2 DOF X/U = -0.098 [V]
ETMY T240 2 DOF Y/V = 0.183 [V]
ETMY T240 2 DOF Z/W = 0.062 [V]
ETMY T240 3 DOF X/U = 0.21 [V]
ETMY T240 3 DOF Y/V = 0.079 [V]
ETMY T240 3 DOF Z/W = 0.105 [V]
ITMX T240 1 DOF Z/W = 0.258 [V]
ITMX T240 2 DOF X/U = 0.204 [V]
ITMX T240 2 DOF Y/V = 0.07 [V]
ITMX T240 3 DOF Y/V = 0.293 [V]
ITMX T240 3 DOF Z/W = 0.16 [V]
ITMY T240 1 DOF X/U = 0.043 [V]
ITMY T240 1 DOF Y/V = 0.088 [V]
ITMY T240 1 DOF Z/W = 0.027 [V]
ITMY T240 2 DOF X/U = 0.021 [V]
ITMY T240 2 DOF Y/V = 0.264 [V]
ITMY T240 2 DOF Z/W = 0.087 [V]
ITMY T240 3 DOF Y/V = 0.046 [V]
BS T240 1 DOF X/U = 0.107 [V]
BS T240 1 DOF Y/V = -0.274 [V]
BS T240 1 DOF Z/W = -0.208 [V]
BS T240 2 DOF X/U = 0.046 [V]
BS T240 2 DOF Y/V = -0.294 [V]
BS T240 2 DOF Z/W = 0.174 [V]
BS T240 3 DOF Y/V = -0.044 [V]
Assessment complete.

H1 TCS (TCS)
ibrahim.abouelfettouh@LIGO.ORG - posted 12:36, Thursday 03 April 2025 (83726)
TCS Chiller Water Level Top Off - FAMIS 27812

Closes FAMIS 27812. Last checked in alog 83486

CO2Y:

Before: 10.4ml

After: 10.4ml

Water Added: 0ml

CO2X:

Before: 30.1ml

After: 30.1ml

Water Added: 0ml

 

No water leaking in our leak detection system (aka dixie cup)

H1 SUS (SEI)
brian.lantz@LIGO.ORG - posted 11:52, Thursday 03 April 2025 (83724)
FYI - new models and screens in userapps/sus/

TL;DR - Don't worry about the new models and screens in /userapps/trunk/sus - Brian is developing these for the OSEM estimator project and none of these are (currently) linked to any observatory model.

--

FYI - As part of the project to see if we can improve the noise caused by the OSEMs, we are developing new models and medm screens for the HLTS. Tracking for this ECR is in FRS ticket 32526.  

We are running these at Stanford for testing, and putting them into userapps because we will be trying them on a triple at LHO soon (detail will be in a different log, they are still in flux a bit).

As such, I've created several new things in userapps. These are not linked to anything at either site - I'm putting this note here to reduce potential worry. These are still in development, so I suggest waiting a bit before you look at these.

New Files:

/userapps/trunk/sus/common/models/
HLTS_MASTER_W_EST.mdl   -  library part for M1 with the estimator calculation
SIXOSEM_T_STAGE_MASTER_W_EST.mdl - library part for upgraded HLTS model with the estimator included.

userapps/trunk/sus/common/medm/hxts/
SUS_CUST_HLTS_OVERVIEW_W_EST.adl - new overview screen with estimator

These files are copies of the existing parts as of March 2025, and I added _W_EST to the name of the copy.

userapps/trunk/sus/common/medm/estim/ - directory of new sub-screeens for the estimator

Updated files:

userapps/trunk/isi/common/models/
blend_switch_library.mdl - I added a new model to this library to allow smooth switching between the osem damping, the estimator damping, and OFF.

I'm running this from the new top-level model in

/userapps/trunk/isi/s1/s1suspr3.mdl

 

 

LHO FMCS (PEM)
ibrahim.abouelfettouh@LIGO.ORG - posted 10:43, Thursday 03 April 2025 (83723)
Checking HVAC Fans - Weekly FAMIS 26371

Closes FAMIS 26371. Last checked in alog 83630,

Everything is under threshold. H0:VAC-MX fans had a sudden increase in noise character and signal 6 days ago.

Images attached to this report
H1 PSL (PSL)
ibrahim.abouelfettouh@LIGO.ORG - posted 10:33, Thursday 03 April 2025 (83721)
PSL Weekly Report - Weekly FAMIS 26382

Closes FAMIS 26832, last checked in alog 83610
 

Laser Status:
    NPRO output power is 1.829W
    AMP1 output power is 70.43W
    AMP2 output power is 141.1W
    NPRO watchdog is GREEN
    AMP1 watchdog is GREEN
    AMP2 watchdog is GREEN
    PDWD watchdog is GREEN

PMC:
    It has been locked 1 days, 20 hr 16 minutes
    Reflected power = 22.99W
    Transmitted power = 105.7W
    PowerSum = 128.7W

FSS:
    It has been locked for 0 days 20 hr and 13 min
    TPD[V] = 0.8222V

ISS:
    The diffracted power is around 4.1%
    Last saturation event was 1 days 20 hours and 15 minutes ago


Possible Issues: None reported

LHO VE
david.barker@LIGO.ORG - posted 10:30, Thursday 03 April 2025 (83719)
Thu CP1 Fill

Thu Apr 03 10:05:16 2025 INFO: Fill completed in 5min 13secs

 

Images attached to this report
H1 PEM (OpsInfo)
thomas.shaffer@LIGO.ORG - posted 10:29, Thursday 03 April 2025 - last comment - 11:52, Thursday 03 April 2025(83716)
CS Dust Monitor Vacuum Pump Swapped with Spare

Yesteerday I noticed that the CS pump could only pull 18inHg (nominal 19) even with the bleed valve closed. There was lots of carbon dust around the exhaust and the filter tumb screws were tight, all signs that it was time for a rebuild. Today, Ryan C and I swapped it with the spare, which fired right up and pulled to well above 20inHg before I adjusted the bleed valve and brought it back to 19.

Two safety notes:

  1. The out plastic on the spade connectors look like they have been damaged from recent swaps (attachment 1). Since we have to feed these through a 90deg elbow and then fish them out of the housing before pluging them in, I'm not surprised that it could have been damaged. We will talk with Fil or similar to find a better solution.
  2. These pumps get very hot, >130F at times, and the foam it sits on to damp it has started to melt and burn (attachment 2). I'll find a new material for it to sit on and update.
Images attached to this report
Comments related to this report
thomas.shaffer@LIGO.ORG - 11:52, Thursday 03 April 2025 (83725)

Richard and I removed the old burnt foam and added some new rubber for the pump feet to sit on. You could still feel the vibration of the pump on the table, but it seemed to be damped well.

Images attached to this comment
H1 SEI (SEI)
ibrahim.abouelfettouh@LIGO.ORG - posted 10:25, Thursday 03 April 2025 (83718)
H1 ISI CPS Sensor Noise Spectra Check - Weekly FAMIS 26037

Closes FAMIS 26037. Last checked in alog 83671.

Expectedly, all plots have elevated signals. This is because we are venting in the LVEA and sensor correction is not in the nominal state. PDF Attached

Non-image files attached to this report
H1 PEM
ryan.crouch@LIGO.ORG - posted 15:17, Wednesday 02 April 2025 - last comment - 15:32, Thursday 03 April 2025(83706)
BSC8 Dust monitor

I set up an internally pumped dust monitor, that I borrowed from the FCES (it was off down there). I used LVEA10's network cable from the Biergartens dust monitor so BSC8s cleanroom dust monitor is trendable as Dust mon LVEA10. The pumpless dust monitor in the biergarten is still taking samples but they're not being written to epics.

Comments related to this report
ryan.crouch@LIGO.ORG - 09:46, Thursday 03 April 2025 (83715)

Trending DM10 dust monitors overnight.

Images attached to this comment
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