[Elenna, Louis]
After the HAM2 work (91959) finished today, we decided to double check AS port powers in a couple states. I trended back about a week to September 10, long before the RCG upgrade (91936). We are seeing a ~20% drop in counts on AS_A and AS_C in PRX_LOCKED and SRY. Also, our PRMI buildup right now is about 56. Last time we locked PRMI without ALS it was 52.
|
ALIGN_IFO State |
Reference Time | AS_A (ref) | AS_A (now) |
AS_A |
AS_C (ref) | AS_C (now) | AS_C now/ref (%) |
POP_A_LF (ref) | POP_A_LF (now) | POP_A_LF now/ref (%) |
|---|---|---|---|---|---|---|---|---|---|---|
| PRX_LOCKED (N=32) | 2026/09/10 15:35:29 UTC | 1240 ct | 992 ct | 80 % | 0.01465 W | 0.0118 W | 81 % | --- | --- | --- |
| MICH_DARK_LOCKED (N=43) | 2026/09/10 15:41:13 UTC | --- | --- | --- | --- | --- | --- | 4.18 | 2.25 | 54 % * |
| SRY (N=62) | 2026/09/10 15:31:56 UTC | 5147 | 4127 | 80 % | 0.061 W | 0.05 W | 82 % | --- | --- | --- |
| SR2_ALIGN (N=59) | 2026/09/10 15:35:35 UTC | 1868.5 | 1797 | 96 % | 0.0224 W | 0.0216 W | 96 % | --- | --- | --- |
* Not sure how comparable this number is since we don't know much about the centering on the LSC POP diode at the reference time. POPX pit & yaw are ~ -1 during this reference time stretch.