I've attached a timeline of our inspection this afternoon along with today's pumping timeline,
Here is a brief summary of observations from previous pumping timelines. Today's pump down is consistent with previously observed timelines.
2:17PM – Assessing the impact of the 408K event in the MegaStat
Coldhead reached 363K (90C)
Innershield reached 403K (130C)
2:24PM – Aquadag E service temperature (149C)
Maximum service temperature in air* : 300°F (149°C)
*Service temperature under vacuum conditions is significantly higher. Contact Acheson for specifics.
2:25PM – Bringing Megastat back up to air for initial inspection
2:37PM – chamber is at air
2:41PM – removing bolts
3:13PM – initial inspection looks normal. No elevated amount of black particulates found on surfaces – consistent with or less than the amount seen last time we opened.
Stephen detected faint smell different from last time (“campfire”?)
3:14PM - Stephen reattaching the RTD wiring that had delaminated. I wiped up visible particulates with isoproponal soaked wipe.
3:21PM – putting lid back on
3:30PM – lid on. Screws in finger tight
3:35PM – screws tight – ready to pump
3:40PM – pumping station on
(Cryo-cooler normally turned on around this time)
Not in this instance though