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    User name Sulkosky

    Log entry time 14:31:52 on July16,2003

    Entry number 104062

    Followups:

    keyword=Septum Tripped again

    When beam came back after beam studies, the BPMB Y position was off by -2 mm. I noticed by looking at the earlier trip that when the Bullseye Scan was started at -2 mm in Y that the Septum slowly started to heat up and the ion chambers jumped from about 400 Rads/hour to 1400 Rads/hour, see Figure 2. Eventually the Septum coil temperatures reached 9 K causing the quench of the lower coil. By the time I realized that the Bullseye scan at -2 mm caused the Septum heating, the Septum had already tripped and the lower coil quenched again.


    FIGURE 1

    FIGURE 2