Subject: Shiftsum for Eve. Jan 9 00
From: Vivian O'Dell (email@example.com)
Date: Fri Feb 04 2000 - 15:12:46 CST
Evening Shift 7 Jan 00
On Shift: SL,RF
Hours of beam available at all intensities: 8.5
Hours of beam available at nominal intensity: 8.5
Hours of E799 data (special runs not included): 7.0
Hours of special runs (laser scans, muon runs...): 0.3
Accounting of lost time:
KFRENDs, ETOT LV pover strip trip
Tapes brought to FCC this shift:
Accesses during shift: None
Runs ended this shift:
15447 E799 data 7.9M events
15449 E799 data 4.9M events
Overview of shift: Fairly smooth E799 data. ETOT LV power strip trip
Description of Shift:
run spill time comment
15447 1530 Run ongoing as shift starts.
1540 Noticed large amplitudes on spill scope and that
the live time was down. Called MCR to work on it.
The spills get even worse as QXR learns in changes
152 1630 Live time still bad. request MCR reduce beam intensity
to 8.5 as they continue to work on the problem.
Trigger hangs just when MCR thinks they have
improved the spill structure.
1655 Red button on ETOT LV - EW Also HCC illum is half
black. Paged Jason, who just got home, to come back.
1730 JH,RF make access to investigate HCC LV problem.
Discovered tripped power strip. Reset; all ok.
Also SL replaces ADC module in Cr. 11 Slot 11 at
15449 1802 Access over, beam back. Start run 15449.
1920 Spill structure seems to have improved. Request 9e12.
See logbook for live time plot.
2004 "I'm full" Change tapes, NM4AN pos->neg. Loaded new
BA HVs. Unfortunately HVs were set to 0 by mistake,
so muon run has only pedestals in it.
15450 2018 Start muon run
2028 Stop muon run
15451 2035 Start BEAM_799 run@ 9e12
21:00 fixed online displays with FIX_DISP_ALL
we need drt_fresh_start next run.
22:30 Started BA tests: check 11bit ADCs
Summary: all modules are fine (no dead channels or bad
channels) Full readout without inputs plugged in have
nice pedestal distributions. Problems occure after
plugging in input cables. Few channels are dead, many
have lowed pedestals. Crate 12 has 2 trerminated
FERA ADCs. It does not give any problems now but
it needs to be replaced (unterminated)
(more details are in the logbook)
2255 Raised intensity request to 9.5e12 to see if live
time has improved. (a little but still low)
Items to Follow up on Next Shift
Next run do DRT_FRESH _START
Label 30 QKE tapes for short reg run and other special runs
Don't forget to hit "reset quartz" button after each KFREND.
This archive was generated by hypermail 2b27 : Fri Feb 04 2000 - 15:12:52 CST