A lot has happened since the last entry. The source blinked out at some point. Cause cited was a PE short. Actions were taken, to be detailed later. Source was re-lit. Beam on FC6 was unstable yet promising overnight last night. In the wee hours it blinked out again and is out presently. Remotely checked vital signs. The only thing that appears to require immediate intervention is the source gas line, which looks very closed. ICR assisted with a check on the Ar bottle at the OLIS gas rack. Previous state unknown. ICR opened bottle and shutoff valves. Pressures on regulator are nominal. There is zero flow across the flow controller. ICR is fully involved with 8pi beam services, so cannot open the OLIS cage at this time, etc. One of us will come in.
Later...Source is back. ~6pnA on FC6 at ~17:00.
Synopsis: Source support gas (argon) ran out due to leak in source gas line. Remedied. Bottle replaced. Source relit OK. Beam intensity went in steps.
Later... Some gains with EE. Leaving it at 7kV with 400W of MW power. |