janos.csizmazia@LIGO.ORG - posted 17:29, Tuesday 23 January 2024 - last comment - 16:10, Friday 26 January 2024(75526)
1-23 vent vacuum diary
Today's activities: - The RGA tree at EX was leak-checked, and multiple flanges were leaky, possibly because of some overheating during a bakeout in the past. The gaskets will be redone, and the all-metal angle valve will be also replaced - EX was vented - The VPW vacuum chamber was opened, after the 2 stuck screw was removed - Both 2 spare roughing stations are entirely finished - All the Hepta header filter works were finished in the LVEA
Measured the purge air dew point at the corner station with no usage from other groups, no people in chamber, measured -41.3 degrees C.
Measured the purge air dew point at EX, no open ports, before vent, measurement was done at the purge valve area, measured -45.4 degrees C.