Fcal/sFcal Pointing resolution S. DAHBI, Y. TAYALATI ( Mohamed V University Rabat) B. LUND-JENSEN ( KTH Royal Institute of Technology Stockholm ) Mohamed.

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Fcal/sFcal Pointing resolution S. DAHBI, Y. TAYALATI ( Mohamed V University Rabat) B. LUND-JENSEN ( KTH Royal Institute of Technology Stockholm ) Mohamed V University Faculty of Sciences Rabat Upgrade Plans for ATLAS Forward Calorimetry

Interpolate points in the graph below at Phi Measured using a linear interpolation between the two points of Phi Truth close to Phi Measured is computed using function Eval( ). The Correction way S-shape correction at 100 GeV e- at Nominal Granularity ( FCal ) S-shape correction at 100 GeV e- at Nominal Granularity ( FCal ) phiMeasuredCorrected=gr->Eval(phiMeasured); φ between 0 to 0.62 rad φ between 0 to 0.62 rad η between 3.4 to 3.5 η between 3.4 to /03/2016Fcal/sFcal Pointing resolution 2 a)b) c)d)

Variation of Pointing Phi Resolution as a function of Eta at Nominal Granularity ( FCal ) Variation of Pointing Phi Resolution as a function of Eta at Nominal Granularity ( FCal ) η between 3.4 to 3.5 η between 3.5 to 3.6 η between 3.6 to 3.7 η between 3.7 to 3.8 η between 3.8 to 3.9 η between 3.9 to 4 η between 4 to 4.1 η between 4.1 to /03/2016Fcal/sFcal Pointing resolution3

Nominal Granularity (before correction). Nominal Granularity (after correction). 23/03/2016Fcal/sFcal Pointing resolution4 Variation of Pointing Phi Resolution as a function of Eta at Nominal Granularity ( FCal ) Variation of Pointing Phi Resolution as a function of Eta at Nominal Granularity ( FCal )

Variation of Pointing Phi Resolution as a function of Energy at Nominal Granularity ( FCal ) Variation of Pointing Phi Resolution as a function of Energy at Nominal Granularity ( FCal ) 5 GeV 23/03/2016Fcal/sFcal Pointing resolution5 200 GeV Nominal Granularity (before correction). Nominal Granularity (after correction).

S-shape correction at 100 GeV e- for Fine Granularity (sFCal) S-shape correction at 100 GeV e- for Fine Granularity (sFCal) φ between 0 to 0.62 rad φ between 0 to 0.62 rad η between 3.4 to 3.5 η between 3.4 to /03/2016 Fcal/sFcal Pointing resolution 6 a) b) c)d)

Variation of Pointing Phi Resolution as a function of Eta for Fine Granularity ( sFCal ) Variation of Pointing Phi Resolution as a function of Eta for Fine Granularity ( sFCal ) η between 3.4 to 3.5 η between 3.5 to 3.6 η between 3.6 to 3.7 η between 3.7 to 3.8 η between 3.8 to 3.9 η between 3.9 to 4 η between 4 to 4.1 η between 4.1 to /03/2016Fcal/sFcal Pointing resolution7

Fine Granularity (before Correction). Fine Granularity (after Correction). 23/03/2016Fcal/sFcal Pointing resolution8 Variation of Pointing Phi Resolution as a function of Eta for Fine Granularity ( sFCal ) Variation of Pointing Phi Resolution as a function of Eta for Fine Granularity ( sFCal )

Variation of Pointing Phi Resolution as a function of Energy for Fine Granularity ( sFCal) Variation of Pointing Phi Resolution as a function of Energy for Fine Granularity ( sFCal) 5 GeV 200 GeV 23/03/2016Fcal/sFcal Pointing resolution9 Fine Granularity (before correction). Fine Granularity (after correction).

CONCLUSION CONCLUSION The pointing resolution in phi for Electrons is clearly better in sFCal than Fcal Applying S-shape corrections improves the resolution significantly. 23/03/ Nominal Granularity (FCal). Fine Granularity (sFcal). Fcal/sFcal Pointing resolution