1. 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

2. TT6: software running at X5
Read APV raw data
Calculates pedestal and noise
first iteration takes 500 (ped) (noise) events;
Mask bad strips if noisy or dead
Subtract common mode noise
CM median.
Return signal on strips
Search for clusters using the 3 thresholds algorithm
3 june 2003
M. D'Alfonso INFN Pisa

3. 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

4. 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.
Are the data appropriate/useful for the measurements that we want to perform ?
We need more statistics?
3 june 2003
M. D'Alfonso INFN Pisa

5. 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

6. Feedback on … (1) … Overlap in TIB layer 3 3 june 2003
M. D'Alfonso INFN Pisa

7. Feedback on… (2) … position of beam (near/far electronic) 3 june 2003
M. D'Alfonso INFN Pisa

8. Feedback on… (3) … noisy and dead strip 3 june 2003
M. D'Alfonso INFN Pisa

9. Feedback on … (4) … beam structure bunches spaced by 25 ns
Run 1460
… beam structure
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

10. 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

11. 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

12. 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