(Jordan V., Dave B., Gerardo M.)
The internal pressure to CP1 turned around overnight signaling that the process of emptying the trap is complete, now we'll continue to monitor and pump on the cryotrap volume.until good pressure is achieved.
A side note, I manually turned off the CC for PT114B last night at 9:44 pm (local time) as the pressure was rising a bit high, then turned it back on this morning at 5:33 am local time.
Attached is a snapshot of one day trend data of pressure behavior regarding the soft regeneration for CP1.
Process started here.
(Jordan, Travis, Gerardo)
CP1 soft regeneration update, CP1 pumpdown continues, system is currently pumped down by the SS500 cart, one turbo pump and one scroll pump. Yesterday we visited the sensing line and we injected high purity nitrogen gas, we removed the lower sensing line near the Rosemount sensor to be able to inject the nitrogen gas, no issue introducing the gas, lower sensing line appears clear.
To be done, leak check CP1.
Attached is a plot of the pressure internal to CP1, the plot is for the total ongoing soft regeneration.
(Jordan, Gerardo)
We leak checked CP1, specifically the bi-braze joints, we introduced He to both sensing lines (we disconnected the lines before the 3 way valve -X marks the spot - , this is less disruption to the shape of the metal tubing lines), we started with the bottom or low sensing line, we introduced 1 psi of flow into the line for about 35 seconds, no signal was detected by the leak detector attached to the exhaust of the turbo pump. We did the same test with the high sensing line, no signal was detected. Since we had the setup on hand we also decided to spray all the bellows, given that now they are free of ice, sprayed helium for about 35+ seconds, no signal was detected by the leak detector at any of the points sprayed.
During all the tests performed the He background at the leak detector was 1.0X10-10 Torr*L/Sec.
