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    User name jpchen

    Log entry time 22:37:14 on April 16, 2011

    Entry number 355844

    This entry is a followup to: 355828

    keyword=CHL trip caused ESR problem and Hall A Helium target vented, recovering now

    Around 7 pm CHL tripped (due to power outage?), which caused ESR problem. We lost ESR supply for a while. Our target warmed up, Helium target vented. When I was called, I instructed TO to lower the fan speed for both loops and wait for ESR supply to come back. (At the same time, since 4K coolant also lost and magnets tripped, I suggested them to also inform the Hall A tech about the cryo problem for the magnets). Hall C target also warmed up and they decided to leave the target warm and canceled all target shifts for the weekend. ESR came back. I am now refilling the Helium loop and cool-down both the Helium and LD2 targets.