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User name Saha
Log entry time 12:14:54 on February16,2000
Entry number 34107
keyword=MCC Meeting - Higher beam currents
After a meeting with Hall B and MCC personnel, we agreed to the following:
1. Today, Thursday and Friday the machine will go to elevated current for
Hall A in order to study the beam current limitation they have. During
these times Hall B may experience machine trips at a higher rate than usual.
2. These periods of elevated current will not last longer than four hours
each day.
3. If machine trips start tripping Hall B drift chambers, then they can request
that the studies cease.
Recent history has Hall A running comfortably at 120 uA. The onset of
problems is at around 130 uA and the final goal is to run at 140 uA.
Shift personnel should be aware of whether or not we are in the
elevated-current mode via communication with MCC and keeping an eye on the
beam parameters being delivered to Hall A.