Displaying reports 1081-1100 of 85870.Go to page Start 51 52 53 54 55 56 57 58 59 End
Reports until 08:35, Friday 03 October 2025
H1 SUS (SUS)
corey.gray@LIGO.ORG - posted 08:35, Friday 03 October 2025 (87272)
Weekly In-Lock SUS Charge Measurement - FAMIS 28425

Had issues with FAMIS, so was not able to check this until today.  Looks like the SUS Charge measurements ran this past Tuesday morning. 

(A procedure note:  when I ran the printing command, it would generate the ETMx plot, but that was it.....until I saved the plot to the desktop and then closed the generated .png plot.  Then it would continue with the other plots (one at a time)---took me a bit to figure that out!)

Attached are the plots for all four Test Masses.  Closing FAMIS 28425.

Images attached to this report
LHO General
ryan.short@LIGO.ORG - posted 07:34, Friday 03 October 2025 - last comment - 09:18, Friday 03 October 2025(87271)
Ops Day Shift Start

TITLE: 10/03 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Observing at 156Mpc
OUTGOING OPERATOR: Corey
CURRENT ENVIRONMENT:
    SEI_ENV state: CALM
    Wind: 3mph Gusts, 2mph 3min avg
    Primary useism: 0.02 μm/s
    Secondary useism: 0.21 μm/s 
QUICK SUMMARY: H1 has been locked for over 10 hours. S251003at earlier this morning at 13:23 UTC.

Comments related to this report
ryan.short@LIGO.ORG - 09:18, Friday 03 October 2025 (87273)
Link

S251003at from this morning was retracted.

Also ran range comparison checks comparing this lock stretch to the last as our range is a bit better. Seems like DARM looks better overall above ~60Hz; Sheila says this is probably just because the squeezer is "better" today. Report attached.

Non-image files attached to this comment
H1 General
oli.patane@LIGO.ORG - posted 22:00, Thursday 02 October 2025 (87270)
Ops EVE Shift End

TITLE: 10/03 Eve Shift: 2330-0500 UTC (1630-2200 PST), all times posted in UTC
STATE of H1: Observing at 155Mpc
INCOMING OPERATOR: Corey
SHIFT SUMMARY: Observing at 155 Mpc and have been locked for over 30 minutes. We recovered from the lockloss really quickly (59 minutes!) and I didn't need to intervene.
LOG:

23:30 UTC Observing and locked for almost 4 hours
01:59 GRB-Short E606552
03:22 Lockloss
04:21 NOMINAL_LOW_NOISE
    04:24 Observing

H1 General (Lockloss)
oli.patane@LIGO.ORG - posted 20:47, Thursday 02 October 2025 - last comment - 21:24, Thursday 02 October 2025(87268)
Lockloss

Lockloss at 2025-10-03 03:22 UTC after just over 7.5 hours locked. It looks like it was caused by a very sudden localish event between 0.3 - 3 Hz (0.3-3 Hz, 1-3 Hz CS).

picket fence, build-ups, LSC, QUADs, peakmon, CS movement vs LL

Images attached to this report
Comments related to this report
oli.patane@LIGO.ORG - 21:24, Thursday 02 October 2025 (87269)
Link

10/03/2025 04:24 UTC Back to Observing

H1 General
oli.patane@LIGO.ORG - posted 20:01, Thursday 02 October 2025 (87267)
Ops EVE Midshift Update

We are still Observing and have been Locked for over 7 hours now. Nothing to report.

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
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
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