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User name M. Rvachev
Log entry time 08:05:59 on February 8,2000
Entry number 33113
keyword=Shift summary
Since we cannot run with OTR in at currents higher than 45uA (an ion chamber trips
in the beamline) it was decided to run at maximum available (94uA) current with
periodic switches to 45 uA to check beam width in arc given by OTR.
0:19 Start taking kin 25 data at 94uA
Checked detectors with dhist, hana and espace. Everything looks very good. As
mentioned on a previuos shift rate of T4 is appr. the same as T3, probably due to
background, as hana shows not many T4 that should be T3. As in a shift before
we see double spikes in hadron S1 TDC, which are probably coming from T4s.
Electron VDC efficiency ~99.7%, hadron ~99.5%, scintillator efficiency in hana
shows as close to 1.
From previous shift summary: Total events on kin 26 so far: 3.9M; 2bbu sum: 192
2:00 Target data acq. reboot because data were not refreshed.
5:35 MCC fixes problems with cavities
5:55 MCC says they are down for at least an hour
7:55 MCC says they are down for development for ~4 hours
run# start stop events Sum comments
1989 0:19 1:17 1M 4.9M 94uA, OTR out
1990 1:20 1:32 0.1M 5M 45uA, OTR in
1991 1:39 2:37 1M 6M 95uA, OTR out
1992 2:40 2:53 0.1M 6.1M 45uA, OTR in, shows 85 um width
1993 2:57 3:52 1M 7.1M 94uA, out
1994 3:54 4:07 0.1M 7.2M 45uA, in
1995 4:18 5:19 1M 8.2M 94uA, out
1996 5:20 5:48 0.1M 8.3M 45uA, in
Up to now estimate of 2bbu events is 166. Scaling estimate of previous shift
to 8.3M events recorded the estimate is 700 events.