with Dan, YamaT, SawadaT
We performed full measurements for the IFO calibration.
The analysis results will be posted at a later date.
Notes:
The DARM-related measurements were conducted after adjusting the feedforward gains (see klog#34410).
Following the same method as klog#34040 and klog#34033, we performed measurements to observe the changes in DC caused by differences in the number of whitening filter stages for ITMX-TM and BS-TM.
Measurement files (`/users/CAL/current/measurements/2025/0603/0920_*`):
0920_BS_TM_PRCL.xml : Whitening = 1 stage
0920_BS_TM_PRCL-1.xml : Whitening = 0 stage
0920_ITMX_TM_DARM_PRFPMI_WFOFF.xml : Whitening = 0 stage
0920_ITMX_TM_DARM_PRFPMI_WFON.xml : Whitening = 3 stages
- Each value is estimated based on JGW-L2314903.
- Estimated values by Pcal and Free-swing are consistent with each other at approximately 3%.
- Previous full measurement which is the reference of comparison is klog#34033.
- There is no significant change in all parameters.
- Numbers in parentheses indicate a number of engaged de-whitening filters.
- Low-frequency (<1Hz) zero/pole in disengaged de-whitening filters (see also klog#33874) are compensated based on circuit measurement only for ETMX in klog#34229 and klog#34244.
- So this effect must be considered for other suspensions.
| Free-swing | XPcal | Diff. from prev. | Figures | |
|---|---|---|---|---|
| H_mich | 1.115e+09 +/- 0.0067e+09 | N/A | -2.8% | Fig.1 |
| A_BS(0) | 6.180e-11 +/- 0.039e-13 | 6.000e-11 +/- 0.048e-11 | +0.8% (Free-swing) | Fig.2-3 (for Free-swing) |
| A_ITMX(0)/A_BS(0) | 0.04956 +/- 0.00038 | same as left | -0.2% | Fig.4-5 |
| A_ITMX(0) | 3.063e-12 +/- 0.030e-12 | 3.3583e-12 +/- 0.0043e-12 | +0.7% (Free-swing) | |
| A_ITMX(3)/A_ITMX(0) | 1.1292 +/- 0.0018 | same as left | +0.1% | Fig.6-7 |
| A_ITMX(3) | 3.459e-12 +/- 0.035e-12 | 3.3583e-12 +/- 0.0043e-12 | +0.7% (Free-swing) | |
| A_ETMX_TM/A_ITMX(3) | 1.1456 +/- 0.0011 | same as left | -7.9% | Fig.8-9 |
| A_ETMX_TM | 3.962e-12 +/- 0.040e-12 | 3.8574e-12 +/- 0.0033e-12 | -0.6% (XPcal) | Fig.10-11 (for XPcal) |
| A_ETMX_IM/A_ETMX_TM | 42.1 +/- 2.4 | N/A | -7.8% | Fig.12-13 |
| A_ETMX_IM | 1.670e-10 +/- 0.097e-10 | 1.68e-10 +/- 0.10 | -8.7% (XPcal) | Fig.14-15 (for XPcal) |
| H_DARM | 2.211e+12 +/- 0.023e+12 | 2.2775e+12 +/- 0.0071e+12 | +0.9% (XPcal) | Fig.16-19 |
| 1/H_DARM | 4.522e-13 +/- 0.048e-13 | 4.391e-13 +/- 0.014e-13 | N/A | |
| A_BS(1)/A_BS(0) | 1.0423 +/- 0.0048 | same as left | +0.5% (Free-swing) | Fig.20-21 |
| A_BS(1) | 6.441e-11 +/- 0.050e-11 | 6.254e-11 +/- 0.057e-11 | +1.3% (Free-swing) | |
| H_MICH | 4.628e+08 +/- 0.036e+08 | 4.767e+08 +/- 0.044e+08 | +9.8% (Free-swing) | Fig.22-25 |
| 1/H_MICH | 2.161e-09 +/- 0.017e-09 | 2.098e-09 +/- 0.019e-09 | N/A | |
| A_PRM(1)/A_BS(1) | 27.21 +/- 0.12 | same as left | +1.0% | Fig.26-27 |
| M2P FF gain | 0.03675 +/- 0.00016 | same as left | N/A | |
| A_PRM | 8.764e-10 +/- 0.078e-10 | 8.509e-10 +/- 0.086e-10 | +2.3% (Free-swing) | |
| H_PRCL | 2.057e+09 +/- 0.018e+09 | 2.118e+09 +/- 0.021e+09 | +4.3% (Free-swing) | Fig.28-31 |
| 1/H_PRCL | 4.862e-10 +/- 0.043e-10 | 4.720e-10 +/- 0.048e-10 | N/A | |
| A_ITMX(3)/A_BS(1) | 0.05369 +/- 0.00049 | same as left | N/A | |
| M2D FF gain | 18.6 +/- 3.2 | same as left | N/A |
