Transcript X5 quasi online Analysis - Istituto Nazionale di Fisica

X5 quasi offline Analysis
T.Boccali, L.Borrello,V.Ciulli,M.D’Alfonso,
N.DeFilippis,S.Dutta,A.Giassi,D.Giordano,
S.Paoletti,R.Ranieri,P.G.Verdini
3 june 2003
M. D'Alfonso INFN Pisa
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TT6: software running at X5
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Read APV raw data
Calculates pedestal and noise
first iteration takes 500 (ped) + 500 (noise) events;
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Mask bad strips if noisy or dead
Subtract common mode noise
CM median.
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Return signal on strips
Search for clusters using the 3 thresholds
algorithm
3 june 2003
M. D'Alfonso INFN Pisa
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TT6…
• … read root files for all detectors
(TIB, TOB, TEC, TIB+TOB)
• … store cluster information and
randomly selected events in two ntuples
 two kumac are used to monitor the data
adapted for module with 4 or 6 apv
3 june 2003
M. D'Alfonso INFN Pisa
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Where the code runs and Why
TT6 Algorithm run on lxcms68:
 A fast feedback (within 30 min) for TIB and
TOB data
 Check the quality of data in real time.
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3 june 2003
Are the data appropriate/useful for the measurements that we
want to perform ?
We need more statistics?
M. D'Alfonso INFN Pisa
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Size of data
Size of data collected ~ 220 GB
TIB alone 56 GB
TOB alone 23 GB
TEC alone 60 GB
TIB + TOB 90 GB
Size of data analysed 100 GB TIB-TOB
Size of ntuples 10 GB
Time to analise a run ~ half an hour
3 june 2003
M. D'Alfonso INFN Pisa
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Feedback on … (1)
… Overlap
in TIB layer 3
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Feedback on… (2)
… position of beam (near/far electronic)
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Feedback on… (3)
… noisy and
dead strip
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Feedback on … (4)
… beam structure
Run 1460
bunches spaced by 25 ns
spill (2s) made of groups of 48
bunches spaced by 23 ms
950 * 25 ns ~ 23 ms
3 june 2003
M. D'Alfonso INFN Pisa
In unit of BX
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Feedback on …(5)
… S/N (vs strips, bias voltage, …)
… APV setting during PLL-delayscan
… CM with different PS set-up
see Carlo and Andrea talks
3 june 2003
M. D'Alfonso INFN Pisa
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To be done
• Improve the CMN subtraction
A Comparison between different algorithms
(mean,median,truncation) is ongoing
• Insert the informations on second cluster to
study particular runs with particle out of
time
3 june 2003
M. D'Alfonso INFN Pisa
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Where is the data and code
• Raw data for TIB TOB and TEC are
copied on Castor
/castor/cern.ch/cms/testbeam/tkX5B/may2003
• The code is available ORCA_7_2_0_pre14
package TkX5bMay2003
by next week all code will be ported to ORCA_7_2_0
3 june 2003
M. D'Alfonso INFN Pisa
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