FERRARA`S GROUP DISCUSSION 29-04-08 COMPARISON BETWEEN OLD NTUPLA vs THE NEW ONE.

FERRARA`S GROUP DISCUSSION

29-04-08

COMPARISON BETWEEN OLD NTUPLA vs THE NEW ONE

OLD NTUPLA vs NEW GEOMETRY (GAUSS V30R4) ALL PADS (WITHOUT CORRECTION X DIFFERENT Z)

29/04/2008 2Simone Brusa, INFN sezione di Ferrara

COLUMN`S EDGES, REGION R4, 6 PADS X CHAMBER

OLD GEOMETRY BOTHGAUSS V25R12 vs NEW GAUSS V30R4 ALL PADS (WITHOUT

CORRECTION X DIFFERENT Z)

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NEW GEO vs OLD GEO, NEW GAUSS BOTH, ALL PADS

29/04/2008 4Simone Brusa, INFN sezione di Ferrara

OLD GEO vs NEW GEO ALL PADS WITH Z CORRECTION IN THE CTALK SELECTION

29/04/2008 5Simone Brusa, INFN sezione di Ferrara

OLD GEO vs NEW GEO JUST FIRST PAD SELECTED

29/04/2008 6Simone Brusa, INFN sezione di Ferrara

NEW GEOMETRYZ CORRECTION vs JUST FIRST PAD

SELECTED

29/04/2008 7Simone Brusa, INFN sezione di Ferrara

OLD GEOMETRY GAUSS V25R12 vs GAUSS V30R4 JUST

FIRST PAD SELECTED (1/2)

29/04/2008 8Simone Brusa, INFN sezione di Ferrara

OLD GEOMETRY GAUSS V25R12 vs GAUSS V30R4 JUST

FIRST PAD SELECTED (2/2)

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Residual differences between old ntupla and old geometry with new gauss just first pad selected

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OLD

NEW

CONCLUSIONS

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1. The problem of the Xpad-XMChit`s jumps between adiacent columns seems to be due mainly to a bad selection of the events with CTALK.

The condition:

if(z[i]!=0 && z[i]== z_CT[iMS])

cuts the events that have geometrical crosstalk between adiacent columns and rows of chambers.

2. Since the Xpad-XMChit distributions are almost the same (see slide 8), why the residual distribution it`s worse than before (same geometry, should be the same pad selection).

It`s just related with the new more realistic binning than in the past?

3. Suggestion in order to unselect the pads at the edges of the chambers:To fix M2-M3 instead of M1-M5, in these way we don`t need to rebin 4.

SPARES

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29/04/2008 13Simone Brusa, INFN sezione di Ferrara

OLD NTUPLA vs NEW GEOMETRY (GAUSS V30R4) ALL PADS (WITHOUT CORRECTION X DIFFERENT Z)

29/04/2008 14Simone Brusa, INFN sezione di Ferrara

OLD NTUPLA vs OLD GEOMETRY (NEW GAUSS V30R4) ALL PADS (WITHOUT CORRECTION X DIFFERENT Z)

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NEW GEO vs OLD GEO, NEW GAUSS X BOTH, ALL PADS

29/04/2008 16Simone Brusa, INFN sezione di Ferrara

OLD NTUPLA vs NEW GEOMETRY ALL PADS WITH CORRECTION X DIFFERENT Z IN THE

CTALK SELECTION

29/04/2008 17Simone Brusa, INFN sezione di Ferrara

OLD NTUPLA vs NEW GEOMETRY JUST FIRST PAD SELECTED

29/04/2008 18Simone Brusa, INFN sezione di Ferrara

NEW GEOMETRYZ CORRECTION vs JUST FIRST PAD SELECTED

OLD GEOMETRY GAUSS V25R12 vs GAUSS V30R4 JUST FIRST PAD

SELECTED

29/04/2008 19Simone Brusa, INFN sezione di Ferrara