We're currently running with a very low helium level to allow the beam to see the carbon disk without helium.
I've set the run valve manually to 0.4, which has the main flow steady at 3.5. The cup temperatures are reading around 14K. The target operators will be watching these values to keep the level low, but the nose cold enough for the material:
Main flow: If the flow goes to below 1, we may have completely lost level in the nose. Open the run valve to increase flow (try in increments of 0.05).
Cup Temperature: Watch the Cx temperatures in PDP. If they are increasing, open the run valve a bit to keep them down. They must stay below 50K. Let me know if they go above 30K and you can't get them down by opening the run valve.
Rate: The 3rd shift worker has a graph of the rate. If we have the run valve open too far, the nose level will rise above the beam and the rate will go back to around 2kHz. Without helium, we have around 0.5kHz. If the rate goes back up, close down the run valve (to zero) and wait for the rate to drop. Once it does, return the run to a bit less than it's previous value. Call me if this takes too long to get the rate back down.