User name johna
Log entry time 16:03:41 on October23,2002
Entry number 88886
Shift summary, day shift, Wednesday October 23rd
8:00 Beam stability problems from end of last shift disappear at 8:00 on the nose. Stable 100 uA beam at start of shift.
~9:55 Lost communication with the target IOC. Target temperature was stable until the beam went away at ~10:00. This was during run 2702, but since the fluctuations did not occur until the beam went away, the data should be OK . The IOC rebooted itself and the target is back to normal.
10:00 MCC takes beam, we request controlled access.
~11:45 Work is finished in the hall (target problems fixed), ask for beam permit and beam
12:20 Back at 110 uA, start run 2703
~12:40 Asked for beam to be centered in x (during run 2705)
~1:00 During shift checklist, noticed that FFB was off. MCC says that it was turned off at 8am this morning (which is what fixed the trip/stability problems they were having). They are waiting on additional diagnostics before turning it back on.
~13:24 MCC called to tell us that they have turned on the energy lock and
14:10 Gas alarm - out of nitrogen. Jack is changing the bottles, estimates
that the VDCs won't notice, the FPPs might notice the brief interruption. Occurred near the end of run 2706.
15:15 Finish run 2707. Ask for beam off for 5 minutes so that Chris Keith can adjust the high powered heater settings.
15:25 Starting run 2708.
15:35 Q1 trips. Ed is going down to reset it.
Runs taken: All are Q3_d40 kinematics
2699: 1M events, nice stable beam (after first 15 min). I_ave=88 uA
2700: 1M events, stable beam, I_ave=94
2701: Scintallator efficiency run (ps1-ps5=1), 1M events
2702: 50k events, stable beam (ended at 10:00 when MCC took beam away)
2703&2704: Junk and/or Cosmics
2705: 1M events, fairly stable beam (position drifting at the 0.2-0.3mm level).
2706: 1M events, stable beam (FFB back on at ~100k events).
2707: 1M events, stable beam, FFB on, beam centered.
2708: 56k events, ends with Q1 trip of left arm.