camilla.compton@LIGO.ORG - posted 12:07, Thursday 27 March 2025 (83589)
Bad SQZ Data Set with SRCL offset at -306
Sheila, Camilla
This morning we changed SRCL offset from -191 to -306 and FC detuning from -34 to -28, as discussed in 83570. Decided to take a SQZ dataset here.
Increased SHG launch, turned OPO trans setpoint up from 80uW to 95uW to increase NLG from 11 to 19 (as we had earlier in O4). Measured NLG with 76542. OPO gain left at -8.
Had some strange HAM7 CPS glitches and WD trips. Think we manged to avoid these effecting the data.
Forgot to turn of SQZ ASC, realized and then we lost lock, this data is not good as the AS42 and ZM alignment offsets were moving around a lot.
| opo_grTrans_ setpoint_uW | Amplified Max | Amplified Min | UnAmp | Dark | NLG (usual) | NLG (maxmin) | OPO Gain |
| 95 | 0.0179401 | 0.000271566 | -0.00002333 | 0.000906905 | 19.3 | 20.8 | -8 |
| Type | Time (UTC) | SQZ @1kHz (dB) | Angle | DTT Ref |
| No SQZ | 18:11:30 - 18:20:00 | N/A | N/A | ref 0 |
| MeanSQZ w/o ADF | 18:22:30 - 18:25:30 | 13.3 | N/A | ref1 |
| FIS Mid SQZ + | 18:28:30 - 18:31:30 | (CLF-) 195 | ref2 | |
| FIS Mid SQZ - | 18:38:30 - 18:41:30 | (CLF-) 127 | ref3 | |
| FIS ASQZ | 18:44:00 - 18:47:00 | 15.8 | (CLF-) 68 | ref4 |
| FIS ASQZ +10deg | 18:47:30 - 18:50:30 | 15.2 | (CLF-) 78 | ref5 |
| FIS ASQZ -10deg | 18:51:00 - 18:54:00 | 15.2 | (CLF-) 58 | ref6 |
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