Hallc beamline fsd guide

Qweak

Only Hall Leader can give permission to mask the FSDs. Below is guidance for the Hall Leader about the possible conditions and who to consult when deciding to mask beamline FSDs.

• Beam exit Window Flow : Never mask
• Dump Chiller : Never mask
• Tungsten Plug : Should only be masked in unusual circumstances, since the is a danger of forgetting to unmask. Ok to mask when run at less than a nA. Consult Greg Smith and Roger Carlini.
• Ion Chambers: Consultant with Dave Gaskell, Greg Smith and Roger Carlini
• Valves: Never mask
• Hydrogen Pressure: Only can be masked when target is warm or out of beam. Consult Greg Smith and Silviu Corvig.
• combined raster/beam current: Rare to need masking once the experiment is running. Consult Greg Smith and Roger Carlini.
• raster: Masking the raster is dangerous. Consult Greg Smith and Silviu Corvig.