TITLE: 07/18 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Corrective Maintenance
INCOMING OPERATOR: Ryan S
SHIFT SUMMARY:

IFO is in CORRECTIVE MAINTENANCE for VENTING

Productive day where we found the culprit (yet to be seen if there are more) to our OFI issues in the form of a burn on the KTP Optic of the OFI (alog 79223). After this point, there were impromptu meetings discussing how to proceed. A slight shift of priorities was announced and the check-list is as follows (E2400260):

WED JULY 17

1. ✅ Check that after HEPI locking SQZ and single bounce beams both go to AS_C, find SRM and SR2 slider values to simulate alignments from early April and from June.
2. ✅ Check ITM OPLEVs
3. ✅ Close GV1,2sheila.d, FC tube GVs
4. ✅ Vent Corner, HI Volts on/off, see their M-doc. Full laser Safe transition. 

THUR JULY 18

1. ✅ Vent and Remove Relay tube
2. ✅ Remove Cameras from HAM6 door (alog 79213)
3. ✅ Open HAM5 via  +X DOOR
4. ✅ Open HAM6 via  +X DOOR
5. ✅ Vent HAM7
6. ✅ HI VOLT BYPASS back on (alog 79222)
7. ✅ Remove HAM5 -X DOOR
8. H6 - Initial inspection of OM1, Refl Beam dump, cables, PDs, beam dumps, etc
9. H5 - Lock ISI
10. H5 - Remove OFI Black glass panel shroud pieces from at least +X side and roof.  TAKE CARE TO INVESTIGATE any clipping or anything out of nominal.

FRI JULY 19

1. Remove HAM6 -X DOOR
2. H6 - Lock ISI
3. Pull CC wafers reachable in both chambers
4. H5 - Initial inspection of OFI and SRM optic surfaces, cables, beam dumps, etc
5. FTIR sample XX areas on table and around any damage areas (5 sample vials).
6. H5 - Transition to Laser Haz
7. Setup AUX laser systems, prioritize HAM5 alignment laser 
8. Using SQZ beam delivered from HAM7, make OFI Measurements in-situ:
   1. Measure loss after each component inc. SRM with power meter. 
9. Transition back to Safe when done.

Aditionally, all TFs for pe-vent suspensions have submitted ALL_TF and comparison TF reports as comments to their initial alogs: alog 79189, alog 79188, alog 79198, alog 79202

These plans are of course tentative and depend on ongoing decisions in this living (and breathing) document. Well done to the quick, efficient and safe vent crew!

THIS JUST IN: Approximately 3s before hitting enter, the vent crew came back with more pictures of backsplashed debris from the two burn spots in the OFI. Stay tuned for more (alogs).

LOG: