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Date: Fri Dec 28 23:59:38 2001, Shift: 16:00-24:00
Supervisor: fv, with: db (~16-18)
Log book#11 pages 106 - 111
Shift Summary:
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0) Run summary:
6187 9920 MRS 36300 FS 2 hours.
6188 4979 MRS 18336 FS 1 hour
6189 still going ( 5182 MRS at 23:45 19888 FS)
Beam data hours 4
A pretty good store once it got going.
o) Accomplishment
Got some work done for trigger inel counters
Add tdc's to data strream
Added histograms to supermon
Problem:Run 6186 stooped at beginning of run.
16:15 Went to pp run planning meeting leaving Dana to mend another
1.5 hour.
18:00 Back from meeting -
The l1458A had turned off. Noticed by DB who had
turned back the Drift voltages etc..
Turned back Si-det!
Turned T3,T4,T5 and RICH back on badtrip which was started.
Rhic preparing for a physics ramp.
Plan for shift:
a) take physics data. (x)
b) Wire in the Inel timing counters (all 32 channels) to TDC's
Dana had already strung the cables (i.e. most of the work)
c) Add these channels to the DAQ readout. (x)
d) Update the defaultmap.txt setting (X)
e) Update BrRawInputData for this enhanced structure. (x)
f) Take another look at RHIC clock timing and the bunch crossing, in order
to prepare for the bunch polarizations setup.-- will wait for tomorrow ..
g) don't forget the dinner in the fridge. (x)
18:40 MCR called to tell they have large losses around 2 o'clock
outgoing triplet. This may be cause for loss of HV mainframe.
They are attepmting to steer around pp2pp ?? (roman pots claims to be out)
19:00 Managed to get a ramp (Y/B ions good 16 and 13e11) but no collisions yet.
19:20 Good store (intensity as good as it gets these early days.)
Started run 6187
Y/B 16/13 e11 ions
Inel rate 2K
Trigger 6 rate 6/sec.
Typical currents in Drift cahmbers
T3: 1.5 - 1.5 2.2 microAmp
T4: 0.86 - 0.60 - 0.7
T5-A1 0.90,0.8 , 0.5
T5-A3 1.34,0.3,0.6
much lower than in Au-Au running (of course this is at <=1%lum.)
A couple of spectr/hits dist in DC looks peculiar
T3-1-U2 has large low time tail as well as extra hits in wires 32-35
T3-1-V1 has a big bump below the 'real timing peak.
19:30 MCR attempted steering, but no improvement. See fig in logbook.
They nore a 4 sec. period on the v124 scalers for the inel counters.
Not seen in other detectors.
This is also seen by pp2pp.
20:20 MCR announced pol measurement
Stopped run 6187
20:30 started RUN 6188.
21:31 stopped RUN 6188.
Increase DC anode voltages by +20 V (all) currents are still low.
The last used HV settings are in the logbook 10 (not here away for copying)
Eff judging from reconstruction of 6188 seems low
T4 tracks / matched T1-T2 == 1/10. (would have though it should be ~1/3 at this
low pt setting near the reference momentum. Calibrations taken from run 5260
(latest avalibale from Au run)
21:35 Start run 6189
23:30 MCR called to ask if we wanted to dump (coll rate is 1400 vs 2000 at start
so said we wanted to wait a little while.
23:50 Announce will keep store until at least 00:30
The trigger summary web page seem to behave strangly. Asked for 8 deg, 427B
and got nothing even though the runs are in the summary, and the A polarity works just
fine. The same happens for MRS (the newest runs).
Si had tripped during the injection- Are the detectors OK??
The camac scaler 11 seem not to be counting (MRS trigger).
-- This one was easy; input connected to input of logic unit.
The inel tdc setup needs more discriminators. The 16 ch used to generate logic (narrow
pulses in incompatible with the driving of a signal to the TDC channel. There is enough
space to add another 16 ch driver disr for the TDC. This helps- will have to check
to Right side - out of NIM slots.
The inel delays are quite long - so the spectra show up toward the very end.
Add 16 nsec to start for these tdc.(right at tdc's)
--detailed log
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