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1 Calice LCUK Bristol 24/03/09 David Ward WP1 : Test Beam.

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Presentation on theme: "1 Calice LCUK Bristol 24/03/09 David Ward WP1 : Test Beam."— Presentation transcript:

1 1 Calice LCUK Bristol 24/03/09 David Ward WP1 : Test Beam

2 2 Calice LCUK Bristol 24/03/09 David Ward Si-W ECAL Absorber material: Tungsten Active material: Silicon wafers 1x1 cm 2 cells 6x6 cells in a wafer 3x3 wafers in a layer 30 layers of Tungsten: 10 x 1.4 mm (0.4 X 0 ) 10 x 2.8 mm (0.8 X 0 ) 10 x 4.2 mm (1.2 X 0 ) ‣ 24 X 0 total 9720 channels

3 3 Calice LCUK Bristol 24/03/09 David Ward Energy resolution 30 GeV Good agreement between data end MC Reasonable energy resolution considering that the main aim is to spatial granularity

4 4 Calice LCUK Bristol 24/03/09 David Ward Linearity Good linearity over a large energy range Good agreement between data and MC Linear response within 1%

5 5 Calice LCUK Bristol 24/03/09 David Ward Analogue HCAL

6 6 Calice LCUK Bristol 24/03/09 David Ward Combined ECAL/AHCAL/TCMT Use weighting (software compensation) to optimise energy resolution Improves resolution from ~61%/√E to ~49%/√E

7 7 Calice LCUK Bristol 24/03/09 David Ward Linearity Linearity of hadron response is good

8 8 Calice LCUK Bristol 24/03/09 David Ward AHCAL – comparisons with GEANT4 models

9 9 Calice LCUK Bristol 24/03/09 David Ward Scintillator-Tungsten ECAL Tungsten (3.5 mm thick) Scintillator layer (3 mm thick) First small prototype (tested in 2007 @ DESY, 1-6 GeV e+) Results show sufficient feasibility in 1-6 GeV e + energy.

10 10 Calice LCUK Bristol 24/03/09 David Ward The ScECAL second test module  The final test module to establish the ScECAL feasibility.  Sandwich structure with scintillator-strips (3 mm) and tungsten layers (3.5 mm).  Extruded scintillator and new generation photon sensor (MPPC) are fully adopted.  Strips are orthogonal in alternate layers.  72 strips x 30 layers = 2160 channels.  Overall size ~ 20 x 20 x 25 cm.  Signal read by same electronics as analogue HCAL.

11 11 Calice LCUK Bristol 24/03/09 David Ward Very Preliminary Results 16 GeV e - (ScECAL only) 16 GeV  - ScECAL linearity for electrons 1 3 6 12 16 25 32 GeV Electron energy spectra ScECAL Analog HCAL Tail catcher

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