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CAL (General)
dan.chen - 19:57 Friday 11 July 2025 (34533) Print this report
Weekly calibration on 7/11
CAL group
We did the calibration measurements and updated the parameters.

Estimated parameters in the Pre-maintenance measurements are as follows.
 H_etmxtm = 3.842050490e-14 @10Hz ( 0.06% from previous measurements)
 H_etmxim = 1.538272700e-14 @10Hz  ( 3.65% from previous measurements)
 Optical_gain = 2.080308644e+12   ( -2.17% from previous measurements)
 Cavity_pole = 18.275875408 Hz  ( 1.30% from previous measurements)

Previous values are listed in klog#34466.

Estimated parameters in the Post-maintenance measurements are as follows.
 H_etmxtm = 3.857020608e-14 @10Hz ( 0.39% from pre-maintenance measurements)
 H_etmxim = 1.603791210e-14 @10Hz  ( 4.26% from pre-maintenance measurements)
 Optical_gain = 2.075302086e+12   ( -0.24% from pre-maintenance measurements)
 Cavity_pole = 18.126316036 Hz  ( -0.82% from pre-maintenance measurements)

Fig.3 and Fig.4 show the fitting results.
Fig.1 and Fig.2 show the ratio of the sensing functions
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Comments to this report:
takahiro.yamamoto - 20:27 Friday 11 July 2025 (34536) Print this report

I updated line tracking parameters (JGW-L2314962).

All detected changes are coming from the planned commissioning activities.
- Changes in foton Fig.1 are related to klog#34533 (k1calcs).
- No changes in guardian (Fig.2).
- Changes in SDF tables shown in Fig.3-4 are related to this klog#34515, klog#34532, klog#34534 (k1calcs), klog#34513, klog#34531 (k1calex, k1caley).
- No changes in the model (Fig.5).

Changes in SDF table by klog#34520 (k1sdfmanage) were not detected because it was accepted/reverted on down.snap instead of observation.snap. So SDF diffs are still remaining on k1sdfmanage. I checked that remaining differences are same as processed on down.snap in klog#34520 or not. Then I found some inconsistency between the processed differences and current values. So I cannot decide how should we process this remaining changes. So IFO guardian is still in LOCKED.

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takahiro.yamamoto - 14:19 Saturday 12 July 2025 (34538) Print this report

After clearing SDF differences, I checked various changes since 9pm yesterday.

There is no change in foton (Fig.1), guardian code (Fig.2), and models (Fig.3).
Changes in SDF tables come from klog#34537 (see also Fig.4).

Finally, I raised CFC_LACTCH and IFO guardian moved from CALIB_NOT_READY to READY.

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