Energy and Spatial Resolution of HyCal

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Energy and Spatial Resolution of HyCal

• Liyang Jiang
• UNCW/CIAE

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• Energy Resolution
• E Resolution vs Incident Energy
• E Resolution vs Incident Position
• Position Resolution
• Position Resolution vs Incident Energy
• Position Resolution vs Incident Position

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Energy Resolution vs E tagger
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Information of runs for energy resolution

• Lead Tungstate
• Run number 4280
• Five minutes deep statistic run on PWO cell 1016
• Lead Glass
• Run number 4279
• Five minutes deep statistic run on Glass cell 657

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Incident Energy distribution
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E tagger E cluster Histogram (Glass)
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Linearity of Energy Reconstruction (Glass)
Red lines 1/- 3
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Ereconstructed/Etagger, show error bars (Glass)
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Energy Resolution Curve (Glass)
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E tagger E cluster Histogram (PWO)
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Linearity of Energy Reconstruction(PWO)
Red lines 1/- 1
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Ereconstructed/Etagger, show error bars (PWO)
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Resolution Curve (PWO)
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Position Resolution vs E tagger
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Gaussian Fit Results (PWO)
Eg5.47GeV
Eg4.76GeV
X (cm)
X (cm)
Eg3.09GeV
Eg2.27GeV
X (cm)
X (cm)
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X VS E gamma (PWO)
X (cm)
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X sigma VS E gamma (PWO)
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Gaussian Fit Results (Glass)
Eg5.47GeV
Eg4.76GeV
Eg3.09GeV
Eg2.27GeV
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X VS E gamma (Glass)
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X sigma VS E gamma (Glass)
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Position Resolution vs Position
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Information of runs

• Snake Scan runs
• PWO Run 4178
• Row 9
• Lead Glass Run 4155
• Bottom Row 3
• Because of low statistics, all tagger energy
  events are included.

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Position in EPICS bank

• Position information of HyCal is read from EPICS
  bank
• The EventID vs EPICS positon plots are fitted
  linearly to calculate the position of events
  without EPICS bank

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EPICS Position vs Event IDRun 4178, PWO Row 9
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EPICS Position vs Event IDRun 4155, Glass Bottom
Row 3
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Single Gaussian Fitting (PWO)
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Single Gaussian Fitting (Glass)
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LinearityRun 4178, PWO
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Resolution CurvePWO
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LinearityRun 4155, Lead Glass
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Resolution CurveGlass
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Comparison to Prototype Resol. Curve
1 cell unit2 cm
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A Simple Simulation

• Simulate the distribution of X reconstructed with
  different resolution curves.

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The Xrecons Distribution (Experimental)
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Original X (Uniform distribution)
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Cosine Resolution and Reconstructed X
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Bottom-Jump Resolution and Reconstructed X
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X reconstructed comparison
Experiment
Simulation
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Summary

• This work provided the Resolution curves of sE vs
  E, sX vs E and sX vs X.
• The sX vs X curves behavior at the edge of cells
  should be studied in detail
• sE vs X curve need a deep statistic scan.