ibrahim.abouelfettouh@LIGO.ORG - posted 16:08, Friday 10 April 2026 (89861)
Input and BS Pointing Over Last Two Weeks
In an effort to capture the input and BS alignment in different configurations, I trended back some suspensions and their OpLev and Raw OSEM values for P and Y. Table is below and plot of total timespan is attached.
| Date | 03/23 | 04/06 | 04/07 | 04/10 (before BSC1 work (1500UTC)) | 04/10 |
| Configuration | HAM 1,2,3 and BSC 1,2 HEPI Unlocked/Nominal, HAM3 ISI Unlocked/Nominal, GV5 Hard Closed | BSC 1,2 HEPI Locked, HAM2 HEPI Unlocked, HAM1/3 HEPI Locked, HAM 3 ISI Locked. GV2 Hard Closed, GV2, GV5 Hard Closed, GV 7 Soft Closed. HAM1 +y Door Still Off | Pre-Vent HAM1,2,3 HEPI Locked, BSC 1/2 HEPI Locked, HAM3 ISI Locked HAM1 +y Door ON | Corner Vented, HAM1,2,3 HEPI Locked, BSC 1/2 HEPI Locked, HAM3 ISI Locked HAM1 +y Door ON | Corner Vented, HAM1,2,3 HEPI Locked, BSC 1/2 HEPI Locked, HAM3 ISI Locked HAM1 +y Door ON, HAM3 Doors Off, BSC1 Door Off |
| Counts | |||||
| BS P Oplev | 5.59 | -2.59 | -5.44 | -1.10 | -1.1 |
| BS Y Oplev | -21.43 | -18.84 | -18.28 | 3.52 | 6.20 |
| MC 1 P | -701.17 | -693.12 | -645 | -165.00 | -1894.65 |
| MC 1 Y | -1386.13 | -1352.15 | -1359.53 | -1381.29 | -1224.55 |
| MC 2 P | 862.00 | 732.19 | 712.30 | 852.70 | 1200.76 |
| MC 2 Y | -629.41 | -405.45 | -406.43 | -376.60 | -998.15 |
| MC 3 P | 401.57 | 372.37 | 358.45 | 332.01 | -1268.06 |
| MC 3 Y | -154.20 | -192.72 | -202.2 | -270.48 | -470.61 |
| IM 4 P | -2442.81 | -2364.65 | -2257.6 | -2332.12 | -2329.7 |
| IM 4 Y | -95.51 | -73.04 | -80.57 | -103.24 | -105.1 |
| PR 2 P | -435.90 | -425.54 | -395.4 | -418.5 | -417.83 |
| PR 2 Y | -1174.28 | -1134.31 | -1141.43 | -1246.12 | -1245.86 |
Images attached to this report
