Log entry time 07:55:10 on July13,2000

Entry number 45693

00:05   Beam arrives shortly after start of shift. Start run 2847 with 6msr collimators.

01:00   Moving collimators out.

01:30   Beam troubles. Fast Feedback causes beam to trip. Unstable beam.

            Running without FF for a while. MCC calls expert.

02:30   Beam relatively stable at 18uA with FF on.

03:10   Beam goes away for aperture checks. MCC can't run Halls A and C

            simultaneously. 

05:10   MCC thinks they have traced the beam problems to flaky Hall C beamline

            monitors. No stable beam for us yet, though ...

05:40   Beam comes back. 34uA, nice and stable.

07:35   MCC takes beam for "10 minutes" to let experts work on Hall C issues.

07:55   Beam being restored.





Time   Run   Events    Comments

00:04   2847  1.4M       6msr collimators in

01:05   2848   --          junk

01:13   2849   773k       collimators open; FF frequently off; many beam trips

02:14   2850   1.3M      FF frequently off, probably not worth analyzing

03:09   2851   --          junk

05:04   2852   226k       Unstable beam, short run, junk

05:40   2853   1.8M       Good stable beam at last

06:45   2854   1.5M

07:19   2855   802k