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.