You can use this script from the operator medm screen.
(PR3 fluctuation was lower than the oplev noise or didn't move.)
F1 GAS of SR3 is now being saturated (previous saturation was reported in klog#34102).
TPs of 2kHz and 65kHz are shown in Fig.1.
Saturation is still caused only in high frequency due to the up-sampling process.
Figure 2 shows the 1-month trend of GAS output and temperature around SR3.
Slightly higher temperature (same as around 25 days ago) seems to be better for F1 GAS output.
Anyway, it's better to do the offload work (by height adjustment or temperature adjustment?) to remove DAC saturation.
IM temperatures during GPS time = 1435056520s - 1435096620s
IX, EX, IY, EY ~ 93, 44, 42, 58 [K]
Apart from the control bandwidth. Does PR3 oplev QPDs have IR filters set?? If no, it might be contamination from the main IR scattered light.
Shift time: 9-17 (JST)
Check Items:
VAC: No issues were found.
CRY cooler: No issues were found.
Compressor: No issues were found.
IFO state (JST):
09:00 The shift was started. The status was OBSERVING.
12:07 Large earthquake arrived, Lockloss
12:46 OBSERVING
17:00 This shift was finished. The status was OBSERVING.
Yokozawa-san,
Since current PRC2 ASC signals are fedback to the setpoint of PR3 OpLevs, the effect of WFS signals through the feedback is smaller than that of OpLev signals.
So, if ASC signals contaminates DARM, it should be also seen in PR3 OpLev signals.
I don't think OpLev feedback affects at such high frequency but could you check the signals?
As you can see, the shape of 60 - 110 Hz was similar in (blue) 10:30 and (red) 13:10, but floor level increasing.
If we can find this issue, we may obtain the hint for next step
Fig.2. showed the coherence between DARM and feedback signal to PR3 yaw.
In current ASC, PR3 yaw signal can be obtained from WFS REFL 45 I.
As shown in klog34400, there are several coherence in 115 Hz 140 Hz and 160 Hz in PDA45I (and 45Q).
If we perform the reshaping of ASC filter for the PRC2, there are possibility to reduce the peaks (or > 100Hz feedback would be too low to fluctuate the PR3 mirror?)
Yokozawa-san,
Since current PRC2 ASC signals are fedback to the setpoint of PR3 OpLevs, the effect of WFS signals through the feedback is smaller than that of OpLev signals.
So, if ASC signals contaminates DARM, it should be also seen in PR3 OpLev signals.
I don't think OpLev feedback affects at such high frequency but could you check the signals?
Apart from the control bandwidth. Does PR3 oplev QPDs have IR filters set?? If no, it might be contamination from the main IR scattered light.
(PR3 fluctuation was lower than the oplev noise or didn't move.)
I used longer data to estimate the Q value of the violin modes.
This time I could set 4096s as the fft length.
Used data: GPS time = 1435056520s - 1435096620s
The results were obtained as follows:
- The fitting performed better than before, primarily because more data points around the peaks could be used for fitting.
- No peaks showed unreasonably large Q-values.
- Most of the peaks have Q-values around 10^5.
- A figure summarizing the fitting results for all peaks is attached. Peaks marked with an "X" indicate cases where the number of available data points was small or where the fitting clearly did not fit well.
- All fitting results have been uploaded to Dropbox: link
Operators name: Tamaki, Yasui
Shift time: 9:00-17:00 (JST)
Check items:
- CRY: The temperature of EX_REFBRT_HEAD was rapidly increased. Consequently, the temperatures of REFBRT_BAR, BRT1 and BRT2 also started increasing, and BRT3 and BRT4 are expected to follow.
(According to the manual, we reported this issue to Ushiba-san and Kimura-san after the regular check at 10:00 and 16:00, because we observed a temperature increase of more than 10 K compared to the previous values.)
- VAC: The pressure values of TMSX and EXC slightly increased due to the temperature rise mentioned above, but this is not caused by H2O.
- TEMP: There was no issue.
IFO state (JST):
9:00 OBSERVING
12:50 LOCKLOSS due to the earthquake
13:16 OBSERVING
13:26 LOCKLOSS due to the earthquake
13:58 OBSERVING
14:06 LOCKLOSS due to the earthquake
15:13 OBSERVING
17:00 OBSERVING
[Shu-Wei Yeh, Chia-Jui Chou]
We applied ICA to clean KAGRA strain data from 1435106958 to 1435111758 (00:49–02:09 UTC, June 28, 2025) [Ref. klog 34400], using a cleaning duration of 1200 seconds. The segment was divided into four intervals for testing noise subtraction: 1435106958, 1435108158, 1435109358, and 1435110558. Here, we present the results for the interval starting at 1435108158.
The central frequencies (f_c), step-by-step improvements, and the overall inspiral range improvement are listed below. We observed effective noise subtraction in the June 28 data.
For the remaining denoising results and the list of witness channels used, please refer to the attached slides here, JGW-G2516738-v2.
The next step is testing DeepClean's performance on the June 28 data.
| f_c [Hz] | Incremental (per-band) improvement [%] | Cumulative improvement [%] |
| 60 | 0.139 | 0.139 |
| 120 | 0.444 | 0.583 |
| 162 | 0.263 | 0.847 |
| 240 | 0.118 | 0.966 |
| 300 | 0.027 | 0.994 |
| 326 | 0.247 | 1.243 |
| 360 | 0.002 | 1.245 |
| 420 | 0.004 | 1.250 |
| 480 | 0.009 | 1.259 |
| 515 | 0.073 | 1.333 |
| 540 | 0.010 | 1.343 |
| 600 | 0.001 | 1.344 |
| 660 | 0.001 | 1.346 |
| 780 | 0.002 | 1.348 |
| 840 | 0.001 | 1.348 |
Operators: Hido, Yasui
Shift time: 9:00-17:00 JST
Check Items: There was no issue on the regular check of VAC, CRY, and TEMP.
(Ikeda-san’s script for comparing cryocooler temperatures was very helpful!)
IFO state (JST):
9:00 OBSERVING
12:33 LOCKLOSS
(While recovering the IFO, there was an earthquake near the Tokara Islands around 12:50.)
13:45 OBSERVING
17:00 OBSERVING
K1CALCS
Channels in JGW-L2314962
It's related to klog#34468
They were updated based on the latest value of optical gain of DARM and ETMX actuator efficiencies in klog#34466.
Changes were accepted on observation.snap (Fig.1), down.snap (Fig.2), and safe.snap (Fig.3).
Finally, numerical rounding errors were reverted after re-loading observation.snap as shown in Fig.4.
I updated line tracking parameters (JGW-L2314962).
All detected changes are coming from the planned commissioning activities.
- Chagens in foton Fig.1 are related to klog#34466 (k1calcs).
- No changes in guardian (Fig.2).
- Changes in SDF tables shown in Fig.3-4 are related to this klog#34467, klog#34469 (k1calcs), and klog#34464 (k1calex, k1caley).
- No changes in the model (Fig.5).
Finally, I raised CFC_LACTCH and IFO guardian moved from CALIB_NOT_READY to READY.
CAL group
We did the calibration measurements and update the prameters.
Estimated parameters in the Pre-maintenance measurements are as follows.
H_etmxtm = 3.840823152e-14@10Hz ( 0.04% from previous measurements)
H_etmxim = 1.546766367e-14@10Hz ( 0.70% from previous measurements)
Optical_gain = 2.114710228e12 ( -0.69% from previous measurements)
Cavity_pole = 18.100765775 Hz ( -0.15% from previous measurements)
Previous values are listed in klog#34424.
Fig. 2 and Fig.4 shows the ratio of the sensing functions estimated.
Estimated parameters in the Post-maintenance measurements are as follows.
H_etmxtm = 3.839861341e-14 @10Hz ( -0.03% from pre-maintenance measurements)
H_etmxim = 1.484142700e-14@10Hz ( -4.05 % from pre-maintenance measurements)
Optical_gain = 2.126367691e12 ( 0.55 % from pre-maintenance measurements)
Cavity_pole = 18.041050536 Hz ( -0.33% from pre-maintenance measurements)
I updated line tracking parameters (JGW-L2314962).
All detected changes are coming from the planned commissioning activities.
- Chagens in foton Fig.1 are related to klog#34466 (k1calcs).
- No changes in guardian (Fig.2).
- Changes in SDF tables shown in Fig.3-4 are related to this klog#34467, klog#34469 (k1calcs), and klog#34464 (k1calex, k1caley).
- No changes in the model (Fig.5).
Finally, I raised CFC_LACTCH and IFO guardian moved from CALIB_NOT_READY to READY.
k1calcs
I accepted the following SDFs in observation.snap, down.snap, and safe.snap.
This is caused by calibration measurements.
Date: 2025/07/04
Member: Misato Onishi, Keisuke Sakanoue
We performed our usual WSK calibration at UToyama.
The results look no problem.
Results
| Case | Alpha (Main Value) | Alpha (Uncertainty) |
| Front WSK, Back GSK | -0.911184 | 0.000188 |
| Front GSK, Back WSK | -0.908968 | 0.000122 |
Comparison with Previous Results
Comparing with previous results, no significant issues were found.
Attached graph is the result summary including the latest measured data.
We accepted the SDFs reported on klog34463.
CALEX, CALEY
K1:CAL-PCAL_{EX,EY}_TCAM_{MAIN,PATH1,PATH2}_{X,Y}
A CAL Tcam session was performed to obtain beam position information necessary for Pcal. The parameters have already been updated, and SDF has alreadly been accepted.
Operator: Shingo Hido, DanChen
Update Time: 2025/07/04 16:16:28
| EPICS Key | Before [mm] | After [mm] | Δ (After - Before) [mm] |
|---|---|---|---|
| K1:CAL-PCAL_EX_TCAM_PATH1_X | 3.31876 mm | 3.46849 mm | +0.14973 mm |
| K1:CAL-PCAL_EX_TCAM_PATH1_Y | 62.68873 mm | 62.58533 mm | -0.10340 mm |
| K1:CAL-PCAL_EX_TCAM_PATH2_X | -0.12871 mm | 0.06867 mm | +0.19738 mm |
| K1:CAL-PCAL_EX_TCAM_PATH2_Y | -63.44419 mm | -63.66836 mm | -0.22417 mm |
Update Time: 2025/07/04 16:17:06
| EPICS Key | Before [mm] | After [mm] | Δ (After - Before) [mm] |
|---|---|---|---|
| K1:CAL-PCAL_EX_TCAM_MAIN_X | 3.48993 mm | 3.73403 mm | +0.24411 mm |
| K1:CAL-PCAL_EX_TCAM_MAIN_Y | 12.19048 mm | 12.20820 mm | +0.01772 mm |
Update Time: 2025/07/04 16:17:41
| EPICS Key | Before [mm] | After [mm] | Δ (After - Before) [mm] |
|---|---|---|---|
| K1:CAL-PCAL_EY_TCAM_PATH1_X | 1.19957 mm | 0.92272 mm | -0.27685 mm |
| K1:CAL-PCAL_EY_TCAM_PATH1_Y | 64.22827 mm | 63.96127 mm | -0.26700 mm |
| K1:CAL-PCAL_EY_TCAM_PATH2_X | -0.41650 mm | -0.71031 mm | -0.29381 mm |
| K1:CAL-PCAL_EY_TCAM_PATH2_Y | -70.59431 mm | -70.49072 mm | +0.10359 mm |
Update Time: 2025/07/04 16:18:19
| EPICS Key | Before [mm] | After [mm] | Δ (After - Before) [mm] |
|---|---|---|---|
| K1:CAL-PCAL_EY_TCAM_MAIN_X | 8.77452 mm | 6.31424 mm | -2.46029 mm |
| K1:CAL-PCAL_EY_TCAM_MAIN_Y | -3.34206 mm | -3.21271 mm | +0.12935 mm |
With Shingo Hido, Hirotaka Yuzurihara
This afternoon, during the Pcal Tcam session, the EYA Tcam stopped and could not capture images. An error message was displayed on the screen: "An error occurred while capturing frame for ZWO ASI294MC."
As a countermeasure, "Recovery" and "Force" under the "Recovery" menu were executed, but a GRD timeout error occurred and recovery was unsuccessful.
After manually setting the GRD to "DOWN," executing "Recovery" - "Recovery" restored normal operation.
If the same error occurs in the future, setting the GRD to "DOWN" before attempting recovery may be an effective procedure.
Kimura and Furuyado (Shinkoh Denki)
In order to repair the insulation defects caused by rust in the distribution board PLX-129,
we confirmed the replacement procedure and the on-site situation.
(See attached photos.)
Based on the results of the check, a distribution board repair plan will be prepared and the repair will be implemented.
