With purge on and both door covers open 2' outside of -Y door plane: Dust counts all zeros!
While Matt was prepping to cut glass, Greg & I did the major rebalance of the ISI.
After Matt got the modified OMC shroud pieces reinstalled, Greg and I completed the ISI rebalance--I'll detail next.
Just before recovering the openings, -X of South Door:
100/0/100/0/200/100 counts for 0.3/0.5/0.7/1.0/2/5/ particals
Got the covers secured and free of the Optical Table with the purge turned down. Jim made quick TFs (will log seperately) and they look fine.
Dan took over next and reports the OMC is still in good shape.
I've completed a thorough visual inspection and as-built of the new mass layout.
Thanks to GregG who spend nearly four hours in chamber.
HAM6 ISI looks healthy after a quick l2l transfer function. See attached spectra. Resonances all look similar to last known good tf's.
I've added my as-built for the WHAM6 mass balance to the DCC at D1201388-v4.
Here are trends of the vertical CPSs indicating how well re-balanced the ISI is after the shroud install. The trend is ~15 days and you can read the current CPS readings on the medm. The ISI is not isolating so this is the free hanging position. The error is less than 100 counts (a few um,) plenty close.
HEPI remains Locked