gabriele.vajente@LIGO.ORG - posted 14:16, Thursday 30 August 2018 (43749)
TMS motion decoupling from SOFT d.o.f.s
This morning I locked the IFO up to ENGAGE_SRC_ASC (so the soft degrees of freedom were still uncontrolled).
I then measured the response of the transmission QPDs to CSOFT, DSOFT and TMS motions. Results are below
Pitch response
| CSOFT_PIT | DSOFT_PIT | TMS X PIT | TMS Y PIT | |
| H1:ASC-X_TR_A_PIT_INMON | 0.034320 | 0.033126 | 0.082365 | -0.000413 |
| H1:ASC-X_TR_B_PIT_INMON | -0.032526 | -0.034011 | 0.161257 | -0.000336 |
| H1:ASC-Y_TR_A_PIT_INMON | -0.000844 | -0.002045 | 0.000469 | 0.087232 |
| H1:ASC-Y_TR_B_PIT_INMON | -0.184214 | 0.190121 | 0.000034 | 0.179455 |
Yaw response
| CSOFT_YAW | DSOFT_YAW | TMS X YAW | TMS Y YAW | |
| H1:ASC-X_TR_A_YAW_INMON | -0.013011 | -0.013201 | 0.107712 | 0.000346 |
| H1:ASC-X_TR_B_YAW_INMON | 0.138074 | 0.132226 | 0.230404 | -0.000457 |
| H1:ASC-Y_TR_A_YAW_INMON | 0.004750 | -0.015159 | 0.000380 | 0.101773 |
| H1:ASC-Y_TR_B_YAW_INMON | -0.150895 | 0.150881 | 0.000959 | 0.188005 |
The inverse matrixes, which should provide us the signals for the soft loops that are decoupled from the TMS motions are below:
Pitch inverse matrix
| H1:ASC-X_TR_A_PIT_INMON | H1:ASC-X_TR_B_PIT_INMON | H1:ASC-Y_TR_A_PIT_INMON | H1:ASC-Y_TR_B_PIT_INMON | |
| CSOFT_PIT | 10.158285 | -5.203855 | 5.463542 | -2.642115 |
| DSOFT_PIT | 9.558392 | -4.866796 | -5.456120 | 2.665092 |
| TMS X PIT | 4.065558 | 4.124789 | -0.025037 | 0.029256 |
| TMS Y PIT | 0.300411 | -0.186573 | 11.388809 | 0.036760 |
Yaw inverse matrix
| H1:ASC-X_TR_A_YAW_INMON | H1:ASC-X_TR_B_YAW_INMON | H1:ASC-Y_TR_A_YAW_INMON | H1:ASC-Y_TR_B_YAW_INMON | |
| CSOFT_YAW | -6.916193 | 3.236467 | 5.394202 | -2.899484 |
| DSOFT_YAW | -6.184460 | 2.887779 | -5.511869 | 3.002154 |
| TMS X YAW | 7.692627 | 0.743966 | -0.052039 | 0.015826 |
| TMS Y YAW | -0.627030 | 0.276288 | 8.753197 | 0.582431 |
New sensing matrix
With the measurement above, and rescaling to maintain similar values, the sensing matrix should be
| C SOFT PIT | TRX A | TRX B | TRY A | TRY B |
|---|---|---|---|---|
| New | -0.619 | 0.317 | -0.333 | 0.161 |
| Old | -0.691 | 0.381 | -0.639 | 0.361 |
| D SOFT PIT | TRX A | TRX B | TRY A | TRY B |
|---|---|---|---|---|
| New | -1.114 | 0.567 | 0.636 | -0.311 |
| Old | -1.114 | 0.686 | 0.355 | 0.201 |
| C SOFT YAW | TRX A | TRX B | TRY A | TRY B |
|---|---|---|---|---|
| New | 0.684 | -0.320 | -0.533 | 0.287 |
| Old | 0.684 | -0.316 | -0.681 | 0.319 |
| D SOFT YAW | TRX A | TRX B | TRY A | TRY B |
|---|---|---|---|---|
| New | 0.684 | -0.320 | 0.610 | -0.332 |
| Old | 0.684 | -0.316 | 0.681 | -0.319 |
This new matrix has been uploaded to the guardian code (in PREP_ASC_FOR_FULL_IFO)
Non-image files attached to this report
