(Anna I., Jordan V., Gerardo M.)

Late entry.

Last Tuesday we attempted to "activate" the NEG pump located on one of the top ports of the output mode cleaner tube, but we opted to do a "conditioning" instead, this due to issues encountered with the gauge related to this NEG pump.  Also, what prompted the work on the NEG pump was the "noted" bump on the pressure inside the NEG housing by the gauge, bump on pressure also noted inside the main vacuum envelope, see attachment for pressure at the NEG housing (PT193) and pressure at PT170.

Side note: Two modes of heating for the NEG pump are available, ACTIVATION and CONDITIONING.  The difference between both options is the maximum applied temperature, for "conditioning" the max temperature is 250 ^oC, where for "conditioning" the max temperature is 550 ^oC.  The maximum temperature holds for 60 minutes.

We started by making sure that the isolation valve was closed, checked it and it was closed.  We connected a pump cart+can turbo pump to the system and pump down the NEG housing volume, the aux cart dropped down to 5.4x10^-05 torr, ready for "activation".  However, we noted no response from the gauge attached to this volume, PT193 signal remained flat.  So, we aborted the "activation" and instead we ran a "conditioning" on the NEG.  After the controller finished running the program, we allowed the system to cool down, while pumping on it, then the NEG housing was isolated from the active pumping, hoses and can turbo were removed, then system was returned to "nominal status" or no mechanical pumping on it.

Patrick logged in h0vaclx, but system showed the gauge nominal, and the system did not allowed to turn filaments because pressure is high.

Long story short, the gauge is broken.  Next week we'll visit NEG1, and its gauge PT191.