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WP1 : Test Beam

WP1 : Test Beam. 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.

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WP1 : Test Beam

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  1. WP1 : Test Beam David Ward

  2. Si-W ECAL Absorber material: Tungsten Active material: Silicon wafers 1x1 cm2 cells 6x6 cells in a wafer 3x3 wafers in a layer 30 layers of Tungsten: • 10 x 1.4 mm (0.4 X0) • 10 x 2.8 mm (0.8 X0) • 10 x 4.2 mm (1.2 X0) ‣ 24 X0 total 9720 channels David Ward

  3. Energy resolution 30 GeV Good agreement between data end MC Reasonable energy resolution considering that the main aim is to spatial granularity David Ward

  4. Linearity Good linearity over a large energy range Good agreement between data and MC Linear response within 1% David Ward

  5. Analogue HCAL David Ward

  6. Combined ECAL/AHCAL/TCMT • Use weighting (software compensation) to optimise energy resolution • Improves resolution from ~61%/√E to ~49%/√E David Ward

  7. Linearity Linearity of hadron response is good David Ward

  8. AHCAL – comparisons with GEANT4 models David Ward

  9. 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. David Ward

  10. The ScECAL second test module David Ward 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. Very Preliminary Results Electron energy spectra 13612162532 GeV 16 GeV e- (ScECAL only) ScECAL linearity for electrons Tail catcher Analog HCAL ScECAL 16 GeV p- David Ward

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