residual studies
DESCRIPTION
RESIDUAL STUDIES. ANALISYS UNDER DIFFERENT SITUATIONS. Residual comparison between old ntupla (TOTdebug3.root, gauss v25r12) and new geometry new gauss (v30r4) just first pad selected (M2-M3 are rebinned 4 also in the next slides). OLD. NEW. - PowerPoint PPT PresentationTRANSCRIPT
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RESIDUAL STUDIES
ANALISYS UNDER DIFFERENT SITUATIONS
13/05/2008 1Simone Brusa, INFN-Ferrara
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Residual comparison between old ntupla (TOTdebug3.root, gauss v25r12) and new geometry new gauss (v30r4) just first pad selected (M2-M3 are rebinned 4 also in the next slides)
13/05/2008 Simone Brusa, INFN-Ferrara 2
OLD
NEW
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COMPARISON BETWEEN OLD NTUPLA GAUSS V25R12 & THE SAME NTUPLA REPROCESSED USING THE LAST VERSION OF
AllineaBrunel (not big pad)
29/04/2008 Simone Brusa, INFN sezione di Ferrara 3
OLD
REPR
OC
ESSED
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What is it changed?Did we changed the selection Algorithm?
Brunel ntupla reprocessed with last version of root`s macro, no big pad.
Old digi reprocessed under new Brunel version (v32r1), same root`s macro
13/05/2008 Simone Brusa, INFN-Ferrara 4
Response: no!
Selected just the first pad for both.
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13/05/2008 Simone Brusa, INFN-Ferrara 5
From the previous slides. we can see that the results obtained using the last version of AllineBrunelCTalk, are comparable.It`s even better than before, remember that we are using the right pad size (different from TDR) and a new binning.
Now the question is:why the residual distributions are so bad now?It depends on the geometry?No (see the plot)!
OLD GEOMETRY, NEW GAUSS V30R4
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New geometry, old Gauss v25r12, just first pad selected
13/05/2008 Simone Brusa, INFN-Ferrara 6
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BOTH NEW GEOMETRY & FIRST PAD SELETCTED GAUSS V25R12 GAUSS V30R4
13/05/2008 Simone Brusa, INFN-Ferrara 7
They are comparable!B is on for both! Is it the source of the problem?
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RESUMING TABLEB field Geomet
ryGauss Boole Brunel Root `s
macroResults Slide #
On New New New New New Bad M4 2
On Old New New New New Bad M4 5
Off Old Old Old Old From Saint Nectaire
OK 2
Off Old Old Old Old New OK 3
Off Old Old Old New New OK 4
On New Old Old Old New Bad M4 6
Off New New New New New Ok Next slide
13/05/2008 Simone Brusa, INFN-Ferrara 8
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New geometry, new Gauss, Boole & Brunel, just first pad selected & Boff (172k muon
tracks reconstructed)
13/05/2008 Simone Brusa, INFN-Ferrara 9
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Conclusions & to do 1/2• Seems that the source of our problem is a bad
pattern recognition with the magnetic field on.• The selection used is just the first pad;• Respect to the last report, I found a my mistake
in the code and the Z correction doesn`t remove the jumps in the Xpad-XMChit distribution between adjacent rows & columns of chambers
• I would to check the results one more time in order to guarantee them.
13/05/2008 Simone Brusa, INFN-Ferrara 10
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Conclusions & to do 2/2
• Next step will be run Brunel setting properly the flag B field to false (should not change the results);I already submit the jobs;
• Remove the cut on the mchits inside the pads;• Modify the pattern recognition algorithm to work
properly also with B on;• Do you have any suggestion?(example look at the
center of the B field instead on IP, …)
13/05/2008 Simone Brusa, INFN-Ferrara 11