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User name kramerk
Log entry time 06:06:33 on December10,2000
Entry number 53243
keyword=Cryotarget Heater Problems
Cryotarget Problem : Whenever beam dropped off the target temperature plummeted down to 17.5 degrees from 19.1 degrees and would continue to drop if the beam was off for a longer time, (16.5 degrees was the lowest it dropped). We noticed the High Power Heater was stuck on 80.1 W. Also, the Operation Mode was in the UNKNOWN state. After some attempts to change the operation mode to RUN, I rebooted the IOC during a period of stable beam. This seemed to fix this problem with the heater, which responded normally to beam trips after that. However, the operation mode is still UNKNOWN. An expert will have to look at it.