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User name V. Sulkosky
Log entry time 08:51:44 on February17,2009
Entry number 261603
Followups:
keyword=MWDC HV's Were OffWhen I came in this morning, I noticed that 8 of the 12 DC HV's were
off: 14.2, 14.3, 14.4, 14.5, 15.0, 15.1, 15.2 and 15.3. The start
of run for the last production run 1509 show these were on at that
point in time. By the time of the first cosmic run, 1510, they were
were already off.
There is no mention of these tripping off or being turned off. Plus
there was no HV alarm. It's possible they tripped off during the
beam instability at the end of Swing shift and it wasn't logged.
FIGURE 1
FIGURE 2
