Gerardo M., Kyle R.

Today we helium leak tested the turbo-side 12" CFF joint of the new VAT valve and found no leak(s) - 1.9 x 10-10 torr*L/sec background/baseline. 

We also started to rough pump the X-mid station but the QDP80 soon tripped off due to the electric motor thermistor protection.  We reset the thermistor, opened the thermostatic control valve (TCV) one full turn and added an external box fan to cool the QDP80 motor+pump combination.  We then resumed rough pumping for another 20 minites or so without a trip before isolating the X-mid from pumping for the night.  We will resume pumping down the X-mid in the morning so as to enable helium leak testing the chamber-side of the two new valves installed on the volume (10" VAT turbo isolation gate valve and 12.8" VAT ion pump isolation gate valve. 

If the overtemperature trips resurface, we will ask Bubba to start up the X-mid chillers.