Maintenance for M9A

The S2+ ceramic was replaced due a huge arc flash. The damaged caused a hole in the ceramic and SF6 gas leaked out to the vacuum space. The steps to do this replacment were:

• Stoped vacuum pumps, gauges, and shut all isolation/gatevalves/SF6 valves and connections
• locked out all high voltages and water to the separator
• reclaimed SF6 gas from feedthru volume of positive and negative side
• removed positive and negative feedthru cables super carefully without scratching crona shields using guide rods. Made sure the brass connector didn't fall inside the ceramic.
• disconnected the HV , magnet and water connections
• vented the vacuum spave with argon gas. Note: when venting with Argon gas, make sure use a mechanical gauge not a convectron gauge!
• removed the argon shut off valve on the north east side and also removed the spare ion gauge from the north- west side of the separator
• disconnected all the grounding wires and other vacuum and controls connection to the Yok magnet and separator.
• disconnect the copper flat bar conductors of the top/bottom yok magnet
• craned out top side of Yok magnet
• removed the beloows from upstream side of the separator ( make sure blanl off all the ports/flanfes)
• craned out the separator outside of the MESA clean room (work permit is necessary)
• cleaned and dust off the separator completly befor rpolling to the cleanroom - Separator sat on its yellow stand and was rolled-in using Hilman Rollers
• removed top lid
• removed ceramic flange using guide rods and supports from inside. Made sure the brass connector didn't fall inside the tank