camilla.compton@LIGO.ORG - posted 10:18, Thursday 17 July 2025 - last comment - 15:48, Friday 18 July 2025(85813)
SQZ Data Set
Matt, Sheila, Camilla,
Took data roughly following 83594 with more mid-sqz data points (adjusting sqz angle to every 50degrees or so looks good in one direction and around every 20degrees in the other direction).
DTT saved as
/ligo/home/matthewrichard.todd/Templates/sqz/20250717_SQZdata.xml and screenshot attached.Before we started we scanned the SQZ angle from 0 to 280deg using 'ezcastep H1:SQZ-CLF_REFL_RF6_PHASE_PHASEDEG -s '3' '+2,150'' to set it later for ADF plot attached, then we ran SCAN_ALIGNMENT_FDS, checked NLG, adjusted OPO temp. Starting angle at 141deg, SQZ_ANG_ADJUST changed it to 148deg.
| Type | Time (UTC) | Angle | DTT Ref | Notes |
| FDS | 15:51:00 - 15:54:00 | (-)148.4 | ref 1 | FDS after scan alignment and sqz ang |
| No SQZ | 15:54:30 - 16:02:00 | N/A | ref 0 | |
| FIS Mean SQZ (no ADF) | 16:04:00 - 16:07:00 | N/A | ref 2 | |
| FIS | 16:08:00 - 16:11:00 | (-) 148 | ref 3 | |
| FIS Mid + SQZ (+50deg) | 16:12:00 - 16:15:00 | (-) 198 | ref 4 | |
| FIS Mid + SQZ (+100deg) | 16:15:30 - 16:18:30 | (-)248 | ref 5 | |
| FIS Mid + SQZ (+150deg) | 16:24:00 - 16:27:00 | (+)120 | ref 6 | Had to change sign here, think we are going the correct direction again. |
| FIS Mid + SQZ (+200deg) | 16:27:30 - 16:30:30 | (+)170 | ref 7 | |
| FIS Mid + SQZ (+250deg) | 16:31:00 - 16:34:00 | (+)220 | ref 8 | |
| ASQZ | 16:36:30 - 16:39:20 | (+)245 | ref 9 | Note we flipped sign in last 10sec of data so only have 2m50s here |
|
FIS Mid - SQZ (-50deg) |
16:40:30 - 16:43:30 | (-)98 | ref 10 | |
| 16:44:00 - 16:47:00 | (-)48 | ref 11 | Note that we'd already gone over ASQZ here | |
| FIS Mid - SQZ (-20deg) | 16:48:00 - 16:51:00 | (-)128 | ref 12 | |
| FIS Mid - SQZ (-75deg) | 16:51:30 - 16:54:30 | (-)73 | ref 13 | |
| ASQZ | 16:55:30 - 16:58:30 | (-)65 | ref 14 | ASQZ again at different SQZ angle (looks the same) |
| FIS Mid - SQZ (-35deg) | 16:59:00 - 17:02:00 | (-)113 | ref15 | |
| FDS Mid SQZ + | 17:06:30 - 17:09:30 | (-)203 | ref16 | |
| FDS Mid SQZ - | 17:12:00 - 17:15:00 | (-)120 | ref17 |
Checked the NLG with adjusting the OPO crystal temp the normal way, using the SEED beam.
| OPO Setpoint | Amplified Max | Amplified Min | UnAmp | Dark | NLG | OPO Gain | Note |
| 80uW | 0.0948 | 0.0023 | 0.00705 | -2.24e-5 | 13.4 | -8 | With changing OPO temp |
Images attached to this report
Comments related to this report
I took 5 minutes of no-sqz data at 524 kHz and saved the outputs as .gwf files in /ligo/home/elenna.capote/OMC_DCPD/251707-103227_xcorr_data