thomas.shaffer@LIGO.ORG - posted 16:08, Wednesday 10 July 2024 (79008)
Further potential fast shutter checks with the AS_ pds but at Prep for DC
Following up from alog78667 where Sheila compared AS_{A,B,C} powers and some of their ratios during our bad alignments and our good ones, I've done the same thing but at the ISC_LOCK state of Prep_DC_Readout_Transition (500). Just like before, the difference between the lowest good AS_C/AS_A ratio and the highest bad ratio is still pretty low. About the same actually.
| AS_C NSUM (W in HAM6) | AS_A NSUM | AS_ B NSUM | AS_C/ AS_A | AS_C/ AS_B | |
| 6/6 20:53 UTC (bad) | 0.0724 | 6156 | 6670 | 1.176e-5 | 1.086e-5 |
| 6/7 2:42 UTC (bad) | 0.0759 | 6544 | 7063 | 1.160e-5 | 1.075e-5 |
| 6/7 3:29 UTC (bad) | 0.0763 | 6566 | 7082 | 1.162e-5 | 1.077e-5 |
| 6/6 12:19 (good) | 0.0862 | 7109 | 7335 | 1.213e-5 | 1.175e-5 |
| 6/6 7:20 UTC (good) | 0.0793 | 6540 | 6792 | 1.213e-5 | 1.168e-5 |
| 6/6 01:11 UTC (good) | 0.0797 | 6569 | 6781 | 1.213e-5 | 1.175e-5 |
| 6/5 10:59 UTC (good) | 0.0765 | 6292 | 6547 | 1.216e-5 | 1.169e-5 |
| 7/10 08:15 UTC (good) | 0.0790 | 6392 | 6771 | 1.236e-5 | 1.167e-5 |
| 7/9 20:51 UTC (good but with lower range) | 0.0789 | 6383 | 6754 | 1.236e-5 | 1.168e-5 |