Ryan S, Elenna, Camilla. Continued from 90609.
Checked the SQZT7 iris, beam was nicely centered. Ryan then moved SRM/ZM6 to try to center AS_AIR camera and AS_, this did not work. Left as Friday settings. OMC was saturated, on e we cleared SUS e we cleared SUS histories, we lost light onAS_A and B. Ryan moved OM1 and OM2 back to their Friday locations using the sliders. Then turned on DC centering loops 3 and 4 until centered and then OMC ASC to center beams on al diodes, apart from AS_C. See attached for alignments and sliders. OMC was not saturating.
For scan that worked well, we set up OMC PDs as Keita suggested (worked only with AW filters off), attached. Gerardo turned the whole corner purger air off. We decreased scan time to 100s. We left the OMC ASC running. Attached is what the main and mode mismatch peaks looked like. We have <2% mode mismatch. I expect we should be happy with this as in O4 we measured only >2%. We could later repeat with different ZM4/5 PSAMS settings to try to improve.
Saved to /opt/rtcds/userapps/release/sqz/h1/Templates/dtt/OMC_SCANS/June15_PurgeOff_2026_OMC_scan.xml
| Dark | TEM00 | TEM02 |
Mismatch*
(% of TEM02)
|
|
| Taken in January, from 90598 | -0.002855 | 0.30352 | 0.000792 | 1.18% |
| Today with Purge at 70-80V of scan | -6.3e-5 | 0.57960 | 0.01095 | 1.86% |
| Today with Purge at 20-40V of scan | -1.5e-4 | 0.55415 | 0.010613 | 1.90% |
*calculated with TEM02 / (TEM00 + TEM02)
