MC studies of the fibreMC studies of the fibreand PbGl prototypesand PbGl prototypes

Raggi Spadaro Leonardi

Physics and Software Working Group 9/08/2007

Mauro Raggi 2

OutlineOutline

Spacal MC statusPbGl MC statusPlanning for MC production

– Spacal

– PbGl

First electron spectrum from SpacalFirt electron spectrum from PbGlConclusion

Mauro Raggi 3

SpaCal & PbGl MC frameworkSpaCal & PbGl MC framework

Geant4 MC simulation– Provide a ROOT file with a hit structure containg the

list of energy deposit of each hit

Digitizer (digitization program)– Describe the readout structure: fibers, light guides,

PMT and ADC. Provide Nphel and ADC counts

TestRead (analysis program)– Produces hystogram using the ROOT interface of the

digitazed events

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Spacal prototype layoutSpacal prototype layout

16.8 cm (4 cells) 8.2 cm (2 cells)

~8X0 ~9X0

3 cel ls

All fibers (same as KLOE) Fibers + 1-mm Pb wires

KLOE-type lead/scintillating fiber calorimeter1-mm diameter scintillating fibers0.5-mm thick lead foils

Full-scale prototype of smallest rings1/3 of final radial thicknessInner/outer radius: 60 cm - 72.5 cmInner/outer length: 309.5 cm - 348.8 cm

Readout granularity: 18 cells, 4.2 x 4.2 cm2

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Status of the SpaCal MCStatus of the SpaCal MCThe G4 description and simulation of the

detector fully provided by Emanuele– Includes 1 half ring as in BTF tests

– Includes the full tagging system

Digitization is now almost ready – Introduced in PMT class the proper Qeff

– Still need optical description of fiber emission WL

– First iteration to tune light generation in fiber done

TestRead interface analysis routine under development

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Status of the PbGl MCStatus of the PbGl MCThe G4 description and simulation of the

detector fully provided by Emanuele– Includes 4 blocks in BTF configuration

– Includes full optical tracking of Cherenkov photons

Digitization almost ready – Introduced PMT class the proper Qeff to match spectrum

– Proper segmentation of energy deposit in 4 blocks introduced

– Proper calibration of P.e x MeV taken form data for each block

TestRead interface analysis routine under development

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Production Planning SpacalProduction Planning Spacal

Same amount of Photon events will be produced also

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Production Planning PbGlProduction Planning PbGl

Same amount of Photon events will be produced also

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Production statusProduction status

Spacal– 200K events e- 200 MeV– 100K events 200 MeV

PbGl– 100K events e- 200 MeV– 100K events e- 500 MeV

MC production already started in LxBatch at CERN

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Spacal energy 200 MeV electronsSpacal energy 200 MeV electrons

(E)/E=11.6 % MC

(E)/E=14 % Data

Promising agreement obtained without any fine tuning

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PbGL N of Photoelectrons 483 MeVPbGL N of Photoelectrons 483 MeV

109.0500/5.52)(.. MeVN EP PE per MeV

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ConclusionConclusion

First development of Digitization of both Spacal and PbGl MC done

First production of data for the comparison with the BTF test ongoing

First spectra obtained show a good qualitative agreement with real data

Fine tuning using information coming from data needed for both MC