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User name Michaels
Log entry time 17:15:06 on October 3,2000
Entry number 49205
keyword=Shift Summary
8:08 Beam back - start run 1351 to link elastics and (e,p) cross sections
8:20 realize SR (hadron/positive) kinematics are wrong
change SR to 58.83 degrees/743.8 MeV/c
change SL to elastics at delta=-2% to reduce QE bkgd (ie: raise B 2%)
cycle SL quads
wait for SR dipole ...............................
8:40 MCC magnet problems
9:15 more MCC magnet problems, 30-40 more minutes
9:50 SR dipole done
10:45 MCC claims to be tuning for us now
11:00 start run 1352 - link elastic (e,e') and (e,p) cross sections
11:20 start run 1353 - get about 100 elastic/100000 events
11:44 reduce trigger 3 ps to 6 to increase elastic rate (was 18 [oops])
11:46 start 1354 - beam 20 microA, on and off all the time
12:00 move spectrometer L for He(e,e'p)! theta=16.88, p=2105
run 1355, 1356 pulser runs (beam off) for ROM
12:15 SL Q2 trip - Quench fault
12:30 access to reset magnet
12:50 problem is nontrivial
13:15 according to Mark Stevens the problem is a ground loop which he will fix the same way he fixed Q3, by putting in an isolating relay. Time estimate: 30 minutes
13:20 Joe has given MCC the beam until 3:30
14:10 Problem on Q2 is fixed, Q2 is up again
4:40 ESR warmed up and 4He target lost.