[Ian, Daniel]

We installed the 6" to 2.75" CF Zero Length Reducer Flange on the 6" Gate Valve on the IFO Cube for the ion pump. I tightened the bolts to 34 Nm. There was a very small gap at the bottom of the flange, but otherwise there was flange to flange contact all around.

I then attached a 2.75" CF 4 way cross which had a composite angle valve (for venting the ion pump section) already attached from the Holometer to this reducer flange. I added a pressure gauge (down to 1 mTorr) that was on an elbow and a small ion pump. I plugged in the gauge and it read ~810 Torr after a few minutes.

I attached an all metal 2.75" CF angle valve to a 2.75" CF Tee. This is meant for the residual gas analyzer.

I tightened all the bolts unitl there was flange to flange contact.