wp1 : test beam

1 Calice LCUK Bristol 24/03/09

David Ward

WP1 : Test Beam


David Ward

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

Energy resolution30 GeV

%1.01.1GeV/

1.06.16)(

Meas

Meas

EE

EGood agreement between data end MC

Reasonable energy resolution considering that the main aim is to spatial granularity


David Ward

LinearityGood linearity over a large energy range

Good agreement between data and MC

Linear response within 1%


David Ward

Analogue HCAL


David Ward

Combined ECAL/AHCAL/TCMT

•Use weighting (software compensation) to optimise energy resolution •Improves resolution from ~61%/√E to ~49%/√E


David Ward

Linearity

Linearity of hadron response is good


David Ward

AHCAL – comparisons with GEANT4 models


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.


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.


David Ward

Very Preliminary Results

16 GeV e-

(ScECAL only)

16 GeV -

ScECAL linearityfor electrons

1 3 6 12 16 25 32 GeV

Electron energy spectra

ScECAL

Analog HCALTail catcher

wp1 : test beam

Documents

gev e energy

strips x

tungsten layers

gev e results

large energy

scecal feasibility

layer30 layers of tungsten

alternate layers