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    User name Armstrong

    Log entry time 21:34:37 on October 02, 2009

    Entry number 292807

    keyword=Beam off; Compton GSO HV trips

    Compton photon detector High Voltage trips, as does beam. This is exactly the thing we saw earlier in the shift - presumably it is the beam causing the photon detector to trip and not vice-versa *grin*.

    MCC calls. Same issue as before: the "capture" RF cavity (right after 5 MeV in the injector, I believe) has tripped because the water supply is out of nominal temperature range. Interestingly, the water is too cold (not what I would have guessed...). They are calling in an expert from EES to look at the temperature control circuit, meanwhile they will try to recover the system (assuming the temperature comes back in range, which is apparently what it did the previous time, earlier this shift).