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MC studies of the fibre and PbGl prototypes. Raggi Spadaro Leonardi Physics and Software Working Group 9/08/2007. Outline. Spacal MC status PbGl MC status Planning for MC production Spacal PbGl First electron spectrum from Spacal Firt electron spectrum from PbGl Conclusion. - PowerPoint PPT Presentation
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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
Mauro Raggi 4
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
Mauro Raggi 5
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
Mauro Raggi 6
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
Mauro Raggi 7
Production Planning SpacalProduction Planning Spacal
Same amount of Photon events will be produced also
Mauro Raggi 8
Production Planning PbGlProduction Planning PbGl
Same amount of Photon events will be produced also
Mauro Raggi 9
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
Mauro Raggi 10
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
Mauro Raggi 11
PbGL N of Photoelectrons 483 MeVPbGL N of Photoelectrons 483 MeV
109.0500/5.52)(.. MeVN EP PE per MeV
Mauro Raggi 12
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