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User name nakahara
Log entry time 05:52:26 on April 10, 2004
Entry number 81914
keyword=Beam gone...really odd behavior
Beam has been gone for a little while now.
Halo rates are reading over 100kHz with NO G0 beam in HallC. Also, the
pivot BPMs readbacks are jumping around, and the G0/G0B BPMs look frozen.
MCC reboots IOCSE20, and the G0/G0B BPMs are now back. But there's
still the problem that something seems to be leaking into HallC. The
halo rates goto 0 when:
1. the slits are closed
2. HallB beam goes off
So this seems to indicate bleedthrough. But why did this happen all of a
sudden?
They re-steer in x on G0B, and now it looks like the halo rates are back
to normal.