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Dch in Geant4-based Simulation
Status Report
(Carlo Dallapiccola, Ernesto Lamanna, Caterina Perri, Mario Posocco, Francesco Safai)
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Ernesto Lamanna
Simulation Review September 23, 1998
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BgsDchSim
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Build the geometry for three different models;
Hit Production selecting the "layer" model ;
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DchBgsModules
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Fast tracking merging Dch and Svt hits ;
Output: reco-like track objects ;
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BgsDchSim
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Geometry
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Retrieved from the dbio file dch.db used for bbsim.
Available models:
fast-cylinder : simple cylindrical fast simulation .
cylinder : Cylindrical volumes including the materials for the inner & outer walls, the rear & front plate.
layer : Cylinder model + subdivision of the gas volume in 40 layers.
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Hit structure
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Geant4 tracks the particles in the DCH.
The particle crosses the layer surfaces; parameters associated to the intersection points are used to generate hits.
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Changes from last simulation review
- New HYPE volume implemented and inserted in the Geant4 release;
Volume tested in one stand alone example simulating the BaBar Dch geometry (40 Dch layers)
Problems in the introduction of HYPE in Bogus (to be fixed).
- New base class BgsTrkHit used to make Dch Hits (the same used for Svt)
Stored material of inner wall in one hit for the fast tracking in the downstream module.
Man Power and Milestones
(E. Lamanna, C. Perri, F. Safai - Roma)
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- Parametrization of dE/dx making DchPid Reco objects.
(M. Posocco - Padova)
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- Tuning of fast Monte Carlo comparing the results to those of Aslund and bbsim.
(C. Dallapiccola, E. Lamanna, C. Perri, M. Posocco - Maryland,Padova,Roma)
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- Downstream module improvements (See Carlo Talk)
(Carlo Dallapiccola)
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