Commissioning data are taken with individual chambers

1

• Commissioning data are taken with individual
  chambers
• TP data
• autotriggered Cosmic rays data ?( different
  configuration)
• Different cosmic track angle ?( sector
  depending)
• Commissioning primary goal is to verify
• the cabling, the trigger and readout i.e the
  MiniCrate performace and last
• the performance of the chambers once installed .
  
• We may gain experience on chambers performances
  with final MC and with real data
• Urgent Problems we have to study their effect
  and origin
• ? 40MZ
• ? occupancy distribution ( pattern)

2
With the data we have to yeld
A ) OVERALL STATISTICS of STANDARD
commissioning Chamber PARAMETERS B ) with
TRACK reconstruction resolution , efficiency,
layers SL Phi alignment . (?? Effect 40MHz
problem ) C ) AUTOTRIGGER performance
rates, correlations with angle (?? Origin of
Occupancy pattern). D )
Correlations between point B) and C) and Sectors
( track angle)
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A) OVERALL STATISTICS of STANDARD commissioning
Chamber PARAMETERS A. 1) -systematic
analysis of noisy/dead cells/afterpulses/40MH
- distinguish between known and new dead
cells increase in dead channels? -
average noise, no. of noisy cells, compare with
cells already identified as noisy
before --gt in addition can
we learn something about the sources of noise? A.
2) -systematic analysis of Mini Crate feature in
all chambers -TestPulses T0(chan) uniformity
- TestPulses differences layers pair and
unpair
4
B) Track reconstruction not yet officially
done on commissioning data but idea/tools are
almost ready . B. 1 ) systematic
studies of resolutions for many/all chambers (
and resolution as a function of angle, trigger
etc etc) Check carefully the effect of the 40
MHz. B. 2 ) efficiency (within a layer,
within a cell) B. 3 ) study the
alignment of the 2 phi-SLs (one with respect to
the other) and of the layers in the SLs.
B.1 ) systematic studies of meantimes for
many/all chambers ( i.e. layers
alignment within a SL) gtit can be useful only
with good time resolution . NB point B1
and B3 are strongly correlated.
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• AUTOTRIGGER performance.
• C. 1 ) statistic of rate as function of type
  of autotrigger and sector
• ( some measurements are performed with scalers
  with no data
• taking and recorded during shifts )
• C. 2 ) correlation between autotrigger and
  efficiency
• C. 3 ) correlation between autotrigger and
  resolution
• C. 4 )uniformity as function of type of
  autotrigger and sector ( possible tools ...)
• C. 5 ) ...(too preliminary ! For cosmic
  challange)....
• comparison between computed autotrigger ( from
  TDC data) and
• and all triggered data. ( trigger
  on defined angle range etc etc)
• C. 6 ).....(too preliminary ! For cosmic
  challange)...

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What is necessary to implement for the above
points A) ( statistics ) Do the work
!!! B) Checks that all parameters needed
for the different points are
automatically computed correctly i.e. check the
robustness of their computation. - T0i (
Test Pulses hardware stability and computation
algorithm .... TP computation
must be performed with more care not yet
satisfactory robust ) - T0 (
common T0 or tTrig) determination algorithmic
developed already in Orca and
quite robust. - geometry ( OK for MB3 ,
MB2 and some MB4 OK a private version for
MB1 ...official MB1
and MB4 geo must be updated for wheel 1 and 2,
for wheel 0 and -1
, -2 next geometry or next year problem)
-Tmax accuracy of 3 good for finding good
efficiency tracks and associated hits.
-T0 _event correction computation.
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I may organize the work for track reconstruction
point B and Xcheck with trigger relation with
point C B) Checks that all parameters needed
for the different points are
automatically computed correctly i.e. check the
robustness of their computation. - T0i (
Test Pulses hardware stability and computation
algorithm .... TP computation
must be performed with more care not yet
satisfactory robust ) - T0 (
common T0 or tTrig) determination algorithmic
developed already in Orca and
quite robust. - geometry ( OK for MB3 ,
MB2 and some MB4 OK a private version for
MB1 ...official MB1
and MB4 geo must be updated for wheel 1 and 2,
for wheel 0 and -1
, -2 next geometry or next year problem)
-Tmax accuracy of 3 good for finding with (good
efficiency tracks and associated hits.Best
measurement after t0_event correction -T0
_event correction computation..