We opened the LVEA to the X arm beam tube today in preparation for HIFO X operation.

Prior to opening valves the LVEA was pumped by one main turbo pump only. Pressure in this state was 6.3 e-7 torr (pt 170B on the X manifold)

At ~ 9:30 pacific time Kyle valved in 4 main ion pumps and isolated the turbo, then at 10:06 he opened GV7 to expose CP2(xarm).

Later in the day at 2:40 he opened GV5 to expose CP1 on the yarm.

Pressure is still falling but is currently at 5 e-8 torr (pt 170B).

So, in summary, moving from one turbo to ion pumps and 80K pumps has given us > a factor of 10 improvement in pressure.

Kyle is adjusting ion pump settings to further improve things as several pumps are not operating correctly.

See attached - 24 hours plotted.