Displaying reports 1341-1360 of 86124.Go to page Start 64 65 66 67 68 69 70 71 72 End
Reports until 16:32, Thursday 02 October 2025
H1 General
oli.patane@LIGO.ORG - posted 16:32, Thursday 02 October 2025 (87266)
Ops EVE Shift Start

TITLE: 10/02 Eve Shift: 2330-0500 UTC (1630-2200 PST), all times posted in UTC
STATE of H1: Observing at 151Mpc
OUTGOING OPERATOR: TJ
CURRENT ENVIRONMENT:
    SEI_ENV state: CALM
    Wind: 12mph Gusts, 6mph 3min avg
    Primary useism: 0.03 μm/s
    Secondary useism: 0.29 μm/s 
QUICK SUMMARY: Observing at 149 Mpc and have been Locked for almost 4 hours. Secondary microseism is going back down and wind is low.

LHO General
thomas.shaffer@LIGO.ORG - posted 16:30, Thursday 02 October 2025 (87258)
Ops Day Shift End

TITLE: 10/02 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Observing at 151Mpc
INCOMING OPERATOR: Oli
SHIFT SUMMARY: Locked for almost 4 hours. Both relocks today needed an initial alignment, and took their time to lock DRMI, but eventually got there. No calibration measurement was run today due to the lock losses around commissioning time. We will need to get one on Saturday.
LOG:

Start Time System Name Location Lazer_Haz Task Time End
22:52 LASER LVEA IS LASER HAZARD LVEA YES LVEA IS LASER HAZARD \u0d26\u0d4d\u0d26\u0d3f(\u239a_\u239a) 13:52
14:53 FAC Randy Xarm n Xarm BTE inspections 18:53
14:53 PEM Robert LVEA YES Setup measurements 16:27
17:42 FAC Kim MX n Tech clean 18:42
19:38 Cheeta Camilla Opt Lab n Optics dropoff 19:52
19:39 FAC Randy Xarm n BTE inspection, near MX 21:52
20:29 FAC Tyler Mids n Checking on and signs 21:14
21:09 ISS Keita, Jennie Opt Lab LOCAL ISS array work 00:09
21:19 PCAL Dripta PCAL Lab LOCAL Taking pictures 21:28
H1 General
thomas.shaffer@LIGO.ORG - posted 12:46, Thursday 02 October 2025 (87261)
Ops Day Mid Shift Report

We lost lock during commissioning for unknown reasons at 1800UTC. Relocking required an initial alignment, and DRMI took 12 minutes to lock, but it got there and we are now Observing at 1944UTC.

H1 ISC
elenna.capote@LIGO.ORG - posted 11:58, Thursday 02 October 2025 - last comment - 11:57, Monday 13 October 2025(87260)
Camera spot calibration

Today I began calibrating the camera servo signals into spot positions. I ran the A2L script at the nominal camera spot positions. Then, I changed the camera offset and waited for the camera servo to converge. Then I remeasured the A2L gain. Using the a2l_lookup function in /opt/rtcds/userapps/release/isc/common/scripts/decoup/BeamPosition the A2L gain can be converted into a spot position in mm. This is a slow process so it will take time to get the conversions for all.

  Camera offset A2L gain Conversion
ETMY Pitch start: -230, end: -231 start: 5.62, end: 5.92

(-23.2 mm - -21.8 mm)/-1ct 

= 1.4 mm/ct
ITMX Pitch start: -230, end: -231 start: -0.45, end: -0.56

(6.46 mm - 5.96 mm)/-1ct  

= -0.5 mm/ct

 

Comments related to this report
elenna.capote@LIGO.ORG - 10:23, Monday 06 October 2025 (87313)
Link

I continued today following the same process stated above.

  Camera offset A2L gain Conversion
ETMX P start: -173, end: -172 start: 3.04, end: 2.92

(-9.38 mm - -9.93 mm)/ 1ct 

= 0.55 mm/ct
ETMY Y start: -349.5, end: -348.5 start: 1.41, end: 1.06

(3.90 mm - 5.18 mm) / 1ct 

= -1.28 mm/ct
ETMX Y start: -422, end: -421 start: 4.85, end: 4.68

(17.22 mm - 17.84 mm)

= -0.62 mm/ct
elenna.capote@LIGO.ORG - 11:57, Monday 13 October 2025 (87442)
Link

I reran the ITMX beam spot calibration following the same method described above, but this time I checked how the beam spot moved on both ITMX and ITMY when I changed the BS camera offset. Turns out, they give the same answer, so that's good.

  Camera Offset A2L gain Conversion
ITMX P (ITMY P) start: -230 ct, end: -231 ct start: -0.45 (0.19), end: -0.55 (0.09)

(6.41 mm - 5.96 mm)/-1 ct

= -0.45 mm/ct
ITMX Y (ITMY Y) start: -236 ct, end: -237 ct start: 3.18 (-2.75), end: 3.06 (-2.63)

(11.26 mm - 11.70 mm)/ -1ct

= 0.44 mm/ct (-0.44 mm/ct for ITMY)

 

LHO VE
david.barker@LIGO.ORG - posted 10:39, Thursday 02 October 2025 (87259)
Thu CP1 Fill

Thu Oct 02 10:07:28 2025 INFO: Fill completed in 7min 24secs

 

Images attached to this report
H1 TCS
camilla.compton@LIGO.ORG - posted 09:02, Thursday 02 October 2025 (87257)
HWS Origin Crosses Updated on ITMs

Matt, Camilla

After TJ and Dave fixed the HWS Live GUI 87252, Matt and I checked on it and re-centered the origin crosses which are meant to mark the center of where the IFO beam is heating the ITM, before and after, sdf diff. We moved them both down but we hadn't updated them in a few years so this isn't too surprising. 

Also attached is a HWS image of the test masses comparing getting to 60W in to 180s later, plot. As usual, ITMY looks clean and ITMX has it's known point absorbers. There is some edge effects on ITMX that should be ignored.

Images attached to this report
LHO General
thomas.shaffer@LIGO.ORG - posted 07:34, Thursday 02 October 2025 (87256)
Ops Day Shift Start

TITLE: 10/02 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Lock Acquisition
OUTGOING OPERATOR: Ibrahim
CURRENT ENVIRONMENT:
    SEI_ENV state: USEISM
    Wind: 12mph Gusts, 8mph 3min avg
    Primary useism: 0.03 μm/s
    Secondary useism: 0.41 μm/s 
QUICK SUMMARY: Looks like we lost lock 2 hours ago. An initial alignment was done an hour ago, but DRMI is not catching despite high flashes. 

Planned calibration and commissioning today, but we need to get back up first.

LHO General
corey.gray@LIGO.ORG - posted 22:00, Wednesday 01 October 2025 (87254)
Wed EVE Ops Summary

TITLE: 10/01 Eve Shift: 2330-0500 UTC (1630-2200 PST), all times posted in UTC
STATE of H1: Observing at 151Mpc
INCOMING OPERATOR: Ibrahim
SHIFT SUMMARY:

H1 has been locked over 18hrs with no issues this shift.

H1 ISC
anthony.sanchez@LIGO.ORG - posted 18:04, Wednesday 01 October 2025 (87255)
ISC Histograms

I took some more histograms of our locking sequences today.
ALS
DRMI-BiWeekly
DRMI-Monthly
DRMI-Daily Average 
Carm
Powerup
& NLN
 

Images attached to this report
Non-image files attached to this report
output.pdf
H1 General (Lockloss)
oli.patane@LIGO.ORG - posted 16:32, Wednesday 01 October 2025 (87251)
Second month of longer locks after ETMX ESD bias increased

Checking in on our DARM lockloss status after the second month of having our higher bias. At the end of August I put some comparison plots in to show how the doubling of the bias had significantly decreased the number of locklosses we had, as well as also significantly decreasing the amount of those locklosses that were due to the DARM glitch(86678). I remade those plots again now that we've gone through September.

In my usual lockloss vs DARM lockloss plot, we see that we've actually had no locklosses due to the DARM glitch between September 3rd - September 30th, which is the longest we've gone in all of O4 without that lockloss cause!

The average lock length has gone down a bit compared to August (10.8 vs 13.3 hours), but that's still double the average lock length of February, March, June, and July (table, plot). The number of lockloses is still also much lower than the pre-ESD-doubling months.

Images attached to this report
LHO General
corey.gray@LIGO.ORG - posted 16:27, Wednesday 01 October 2025 (87253)
Wed EVE Ops Transition

TITLE: 10/01 Eve Shift: 2330-0500 UTC (1630-2200 PST), all times posted in UTC
STATE of H1: Observing at 152Mpc
OUTGOING OPERATOR: TJ
CURRENT ENVIRONMENT:
    SEI_ENV state: USEISM
    Wind: 8mph Gusts, 5mph 3min avg
    Primary useism: 0.04 μm/s
    Secondary useism: 0.59 μm/s 
QUICK SUMMARY:

H1's been locked 12.5+hrs, even with microseism a little higher than last night! Cloudy skies, light breezes and an Operator BBQ celebrating O4a & Detections operators were on-shift for.

LHO General
thomas.shaffer@LIGO.ORG - posted 16:20, Wednesday 01 October 2025 (87246)
Ops Day Shift End

TITLE: 10/01 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Observing at 152Mpc
INCOMING OPERATOR: Corey
SHIFT SUMMARY: Locked for 12 hours. The useism is staying constant, wind is staying low. 
LOG:

                                                                                                                                                                                                                                                                                                

Start Time System Name Location Lazer_Haz Task Time End
22:52 LASER LVEA IS LASER HAZARD LVEA YES LVEA IS LASER HAZARD \u0d26\u0d4d\u0d26\u0d3f(\u239a_\u239a) 13:52
15:53 FAC Randy X arm n X arm beam tube enclosure inspections 21:48
16:48 FAC Kim H2 build n Swifting 17:00
20:37 FAC Tyler Mids n Checks 21:37
H1 TCS
thomas.shaffer@LIGO.ORG - posted 16:19, Wednesday 01 October 2025 (87252)
HWS live GUI fixed

We recently noticed that the HWS live GUI wasn't working. In trying to troubleshoot this, I found that there are a few different instances of it - gitcommon area, userapps, personal alias's, and maybe others that I dont know about. They were either copies of the git code, pointed at different branches of the git repo, or modified versions, but none were consistent. I've now corrected the new path for the hws data directory (alog84865), and updated the git repo with the changes. The version in userapps I've just copied from this for now so it continues to work, but I'd like to change that in the future. 

Long story short, it should work now.

H1 General
thomas.shaffer@LIGO.ORG - posted 12:34, Wednesday 01 October 2025 (87249)
Ops Day Mid Shift Report

Locked for 8.5 hours. The useism is still >90th percentile and our SEI_ENV node is in USEISM as a result. Range is stable.

H1 PSL
ryan.short@LIGO.ORG - posted 11:48, Wednesday 01 October 2025 (87248)
PSL 10-Day Trends

FAMIS 31105

Looks like most things have settled out after our table inspection last Tuesday (alog87143), although PMC reflected power has been moving around a bit more than usual. ISS diffracted power also has been falling slightly, but right now it looks to have settled at around our target of 4%.

Images attached to this report
H1 SUS
filiberto.clara@LIGO.ORG - posted 11:31, Tuesday 30 September 2025 - last comment - 15:59, Monday 13 October 2025(87225)
Sat Amps Modified: PR2 and SR2

WP 12813
ECR E2400330
Modified List T2500232

The following SUS SAT Amps were upgraded per ECR E2400330. Modification improves the whitening stage to reduce ADC noise from 0.05 to 10 Hz.

Suspension Old New OSEM
PR2 M2 S1100174 S1100159 ULLLURLR
PR2 M3 S1100093 S1100141 ULLLURLR
SR2 M2 S1100169 S1100070 ULLLURLR
SR2 M3 S1100134 S1000295 ULLLURLR

F. Clara, J. Kissel, O. Patane

Comments related to this report
oli.patane@LIGO.ORG - 15:21, Thursday 02 October 2025 (87237)
Link

(Since Jeff is out of town, I'm putting these in for these swaps.)

Here's the characterization data and fit results for S1100159, assigned to PR2 M2's ULLLURLR OSEMs.

This sat amp is a UK 4CH sat amp, D0900900 / D0901284.

The data was taken per methods described in T080062-v3, using the diagrammatic setup shown on PAGE 1 of the Measurement Diagrams from LHO:86807.

The data was processed and fit using
    ${SusSVN}/trunk/electronicstesting/lho_electronics_testing/satamp/ECR_E2400330/Scripts/
         plotresponse_S1100159_PR2_M2_ULLLURLR_20250924.m

Explicitly, the fit to the whitening stage zero and pole, the transimpedance feedback resistor, and foton design string are
Optic    Stage    Serial_Number    Channel_Number     OSEM_Name    Zero_Pole_Hz    R_TIA_kOhm    Foton_Design
PR2      M2       S1100159         CH1                UL           0.0956:5.22      120.25    "zpk([5.22],[0.0956],1,""n"")"
                                   CH2                LL           0.0967:5.28      120       "zpk([5.28],[0.0967],1,""n"")"
                                   CH3                UR           0.0978:5.34      120       "zpk([5.34],[0.0978],1,""n"")"
                                   CH4                LR           0.0969:5.3       120       "zpk([5.3],[0.0969],1,""n"")"
                                   
  
The attached plot and machine readable .txt file version of the above table are also found in
    ${SusSVN}/trunk/electronicstesting/lho_electronics_testing/satamp/ECR_E2400330/Results/

Per usual, R_TIA_kOhm is not used in the compensation filter -- but after ruling out an adjustment in the zero frequency (by zeroing the phase residual at the lowest few frequency points), I nudged the transimpedance a bit to get the magnitude scale within the ~0.25%. shown in the attached results. Any scaling like this will be accounted for instead with the absolute calibration step, i.e. Side Quest 4 from G2501621, a la what was done for PR3 and SR3 top masses in LHO:86222 and LHO:84531 respectively.
Non-image files attached to this comment
oli.patane@LIGO.ORG - 15:19, Thursday 02 October 2025 (87262)
Link

(Since Jeff is out of town, I'm putting these in for these swaps.)

Here's the characterization data and fit results for S1100141, assigned to PR2 M3's ULLLURLR OSEMs.

This sat amp is a UK 4CH sat amp, D0900900 / D0901284.

The data was taken per methods described in T080062-v3, using the diagrammatic setup shown on PAGE 1 of the Measurement Diagrams from LHO:86807.

The data was processed and fit using
    ${SusSVN}/trunk/electronicstesting/lho_electronics_testing/satamp/ECR_E2400330/Scripts/
         plotresponse_S1100141_PR2_M3_ULLLURLR_20250924.m

Explicitly, the fit to the whitening stage zero and pole, the transimpedance feedback resistor, and foton design string are
Optic    Stage    Serial_Number    Channel_Number     OSEM_Name    Zero_Pole_Hz    R_TIA_kOhm    Foton_Design
PR2      M3       S1100141         CH1                UL           0.0957:5.22    120.25    "zpk([5.22],[0.0957],1,""n"")"
                                   CH2                LL           0.0949:5.17    120.5    "zpk([5.17],[0.0949],1,""n"")"
                                   CH3                UR           0.0977:5.33    120.375    "zpk([5.33],[0.0977],1,""n"")"
                                   CH4                LR           0.0946:5.16    120.25    "zpk([5.16],[0.0946],1,""n"")"
                                   
  
The attached plot and machine readable .txt file version of the above table are also found in
    ${SusSVN}/trunk/electronicstesting/lho_electronics_testing/satamp/ECR_E2400330/Results/

Per usual, R_TIA_kOhm is not used in the compensation filter -- but after ruling out an adjustment in the zero frequency (by zeroing the phase residual at the lowest few frequency points), I nudged the transimpedance a bit to get the magnitude scale within the ~0.25%. shown in the attached results. Any scaling like this will be accounted for instead with the absolute calibration step, i.e. Side Quest 4 from G2501621, a la what was done for PR3 and SR3 top masses in LHO:86222 and LHO:84531 respectively.
Non-image files attached to this comment
oli.patane@LIGO.ORG - 15:24, Thursday 02 October 2025 (87263)
Link

(Since Jeff is out of town, I'm putting these in for these swaps.)

Here's the characterization data and fit results for S1100070, assigned to SR2 M2's ULLLURLR OSEMs.

This sat amp is a UK 4CH sat amp, D0900900 / D0901284.

The data was taken per methods described in T080062-v3, using the diagrammatic setup shown on PAGE 1 of the Measurement Diagrams from LHO:86807.

The data was processed and fit using
    ${SusSVN}/trunk/electronicstesting/lho_electronics_testing/satamp/ECR_E2400330/Scripts/
         plotresponse_S1100070_SR2_M2_ULLLURLR_20250924.m

Explicitly, the fit to the whitening stage zero and pole, the transimpedance feedback resistor, and foton design string are
Optic    Stage    Serial_Number    Channel_Number     OSEM_Name    Zero_Pole_Hz    R_TIA_kOhm    Foton_Design
SR2      M2       S1100070         CH1                UL           0.0961:5.24    120.25    "zpk([5.24],[0.0961],1,""n"")"
                                   CH2                LL           0.0965:5.27    120.375    "zpk([5.27],[0.0965],1,""n"")"
                                   CH3                UR           0.0961:5.23    120.5    "zpk([5.23],[0.0961],1,""n"")"
                                   CH4                LR           0.0963:5.26    120.75    "zpk([5.26],[0.0963],1,""n"")"
                                   
  
The attached plot and machine readable .txt file version of the above table are also found in
    ${SusSVN}/trunk/electronicstesting/lho_electronics_testing/satamp/ECR_E2400330/Results/

Per usual, R_TIA_kOhm is not used in the compensation filter -- but after ruling out an adjustment in the zero frequency (by zeroing the phase residual at the lowest few frequency points), I nudged the transimpedance a bit to get the magnitude scale within the ~0.25%. shown in the attached results. Any scaling like this will be accounted for instead with the absolute calibration step, i.e. Side Quest 4 from G2501621, a la what was done for PR3 and SR3 top masses in LHO:86222 and LHO:84531 respectively.
Non-image files attached to this comment
oli.patane@LIGO.ORG - 15:26, Thursday 02 October 2025 (87264)
Link

(Since Jeff is out of town, I'm putting these in for these swaps.)

Here's the characterization data and fit results for S1000295, assigned to SR2 M3's ULLLURLR OSEMs.

This sat amp is a UK 4CH sat amp, D0900900 / D0901284.

The data was taken per methods described in T080062-v3, using the diagrammatic setup shown on PAGE 1 of the Measurement Diagrams from LHO:86807.

The data was processed and fit using
    ${SusSVN}/trunk/electronicstesting/lho_electronics_testing/satamp/ECR_E2400330/Scripts/
         plotresponse_S1000295_SR2_M3_ULLLURLR_20250924.m

Explicitly, the fit to the whitening stage zero and pole, the transimpedance feedback resistor, and foton design string are
Optic    Stage    Serial_Number    Channel_Number     OSEM_Name    Zero_Pole_Hz    R_TIA_kOhm    Foton_Design
SR2      M3       S1000295         CH1                UL           0.0964:5.27    121.75    "zpk([5.27],[0.0964],1,""n"")"
                                   CH2                LL           0.0954:5.21    121.625    "zpk([5.21],[0.0954],1,""n"")"
                                   CH3                UR           0.0955:5.22    121.375    "zpk([5.22],[0.0955],1,""n"")"
                                   CH4                LR           0.0964:5.26    122    "zpk([5.26],[0.0964],1,""n"")"
                                   
  
The attached plot and machine readable .txt file version of the above table are also found in
    ${SusSVN}/trunk/electronicstesting/lho_electronics_testing/satamp/ECR_E2400330/Results/

Per usual, R_TIA_kOhm is not used in the compensation filter -- but after ruling out an adjustment in the zero frequency (by zeroing the phase residual at the lowest few frequency points), I nudged the transimpedance a bit to get the magnitude scale within the ~0.25%. shown in the attached results. Any scaling like this will be accounted for instead with the absolute calibration step, i.e. Side Quest 4 from G2501621, a la what was done for PR3 and SR3 top masses in LHO:86222 and LHO:84531 respectively.
Non-image files attached to this comment
H1 ISC
matthewrichard.todd@LIGO.ORG - posted 10:08, Tuesday 30 September 2025 - last comment - 13:27, Wednesday 01 October 2025(87221)
Measurements of IMC ASC DOFs coupling to RIN

M. Todd

Summary

This morning I used the early maintenance day to come in and make some measurements of IMC DOF Transfer Functions to ISS Second Loop RIN. I started by doing some OPS/GRD settings as I was here about an hour before the operator was set to come in.

I got through the first DOF measurement (DOF_1_P) without any hiccups; however a 7.0 earthquake from Philippines came in an unlocked us. Fortunately, I did not have to wait long for the IMC to relock and I proceeded with the other measurements.

DOF 1 and DOF 2 are relatively robust, but upon starting the DOF 3 measurement I had to lower the gain even more than anticipated, as the 1 and 3 Hz resonances are quite strong. The first run at this unlocked the IMC. After clearing the IMC DOF 3 P history, I let the IMC relock (it was having trouble) and continued with the subdued measurements.

I also tried to measure the UGF of each DOF loop, but was nervous about injecting that hard at the frequencies I suspected would contain the UGF.

Later, I will post a comment that tries to map the quiet time IMC contributions to the ISS Outer RIN in the regions we have enough coherence.

List of Figures

  1. DOF 1 P Measurement of IMC to ISS 2ND LOOP RIN
  2. DOF 1 Y Measurement of IMC to ISS 2ND LOOP RIN 
  3. DOF 2 P Measurement of IMC to ISS 2ND LOOP RIN
  4. DOF 2 Y Measurement of IMC to ISS 2ND LOOP RIN
  5. DOF 3 P Measurement of IMC to ISS 2ND LOOP RIN
  6. DOF 3 Y Measurement of IMC to ISS 2ND LOOP RIN
Images attached to this report
Comments related to this report
matthewrichard.todd@LIGO.ORG - 13:27, Wednesday 01 October 2025 (87250)
Link

I'm adding a plot of projections of the quiescent noise in each IMC DOF loop to the ISS second loop. Note, I've cut off the TFs above 3 Hz due to coherence loss.

Non-image files attached to this comment
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