04/04/2008LNGS, OPERA Collaboration Meeting1 Simulation/Reconstruction Software activity of JINR group /Dmitry V.Naumov A.Chukanov, S.Dmitrievsky, Yu. Gornushkin, D.Naumov, E.Naumova, A.Sheshukov, S.Zemskova

04/04/2008LNGS, OPERA Collaboration Meeting2 /Dmitry V.Naumov eccVMC – as an exercise While among us there are experienced people, most are students... thus we did an exercise: Wrote a Virtual MC application with G3, G4, and FLUKA all working Use OpNeg for neutrino vertex generation + own generators for user wanted tracks +... call emulsion reconstruction algorithms if desired Build ROOT based GUI and batch for manipulation with simulated and reconstruction events

04/04/2008LNGS, OPERA Collaboration Meeting3 /Dmitry V.Naumov VMC + G4

04/04/2008LNGS, OPERA Collaboration Meeting4 /Dmitry V.Naumov VMC + FLUKA

04/04/2008LNGS, OPERA Collaboration Meeting5 /Dmitry V.Naumov VMC + G4

04/04/2008LNGS, OPERA Collaboration Meeting6 /Dmitry V.Naumov VMC + G4

04/04/2008LNGS, OPERA Collaboration Meeting7 /Dmitry V.Naumov eccVMC OPERA ntuples VMC G3,G4,Fluka eccVMC Application Fedra Reconstruction eccVMC root event Input Output Visualization Prompt tracks (user defined)‏ Fedra event Background ecc_VMC

04/04/2008LNGS, OPERA Collaboration Meeting8 /Dmitry V.Naumov Aligning of ECC plates with cosmic pit muons Ideal caseRealistic case + ignore the reality...suggested to us by V.Tioukov

04/04/2008LNGS, OPERA Collaboration Meeting9 /Dmitry V.Naumov Analysis Strategy: Do NOT introduce misalignment but try to align the ECC plates with base-tracks left by muons + produced particles Two steps: Study alignment with muons of definite energy and direction Study how much muons are needed in order to reach the requested alignment accuracy Study alignment with a realistic flux: muon, electrons, photons, etc We use a simulation of flux by M.Sioli (thanks!) for 72 hours

04/04/2008LNGS, OPERA Collaboration Meeting10 /Dmitry V.Naumov What the ECC will experience in 5 minutes of Cosmic Pit exposure

04/04/2008LNGS, OPERA Collaboration Meeting11 /Dmitry V.Naumov Distribution of shifts of with 20 muons of 4 GeV

04/04/2008LNGS, OPERA Collaboration Meeting12 /Dmitry V.Naumov Gaussian Sigma as a function of number of muons of 4 GeV

04/04/2008LNGS, OPERA Collaboration Meeting13 /Dmitry V.Naumov Now take the realistic simulation by M.Sioli and study alignment precision as a function of exposure time and scanning volume PRELIMINARY

04/04/2008LNGS, OPERA Collaboration Meeting14 /Dmitry V.Naumov Now take the realistic simulation by M.Sioli and study alignment precision as a function of exposure time and scanning volume PRELIMINARY

04/04/2008LNGS, OPERA Collaboration Meeting15 /Dmitry V.Naumov How neutrino event may look like after cosmic pit exposure? Time: 3 minutes Volume: 1 cm^3 Input Cosmics: M.Sioli Propagator: Geant4

04/04/2008LNGS, OPERA Collaboration Meeting16 /Dmitry V.Naumov In summary We would be pleased to contribute to OpRelease software in G4, FLUKA intefrace and validations GUI Merge our experience into the common framework We are going to summarize our work on ECC alignment soon Write a note Study also depends of track momentum resolution on the alignment accuracy

04/04/2008LNGS, OPERA Collaboration Meeting17 /Dmitry V.Naumov Backup slides

04/04/2008LNGS, OPERA Collaboration Meeting18 /Dmitry V.Naumov How to attack the problem? Only 1 ECC (geometry + material) ‏ Generators of muons (and background particles) ‏ Transporter (G3, G4, FLUKA) ‏ Reconstruction Alignment algorithms Analysis: batch and GUI What is needed for simu+reco: FEDRA

04/04/2008LNGS, OPERA Collaboration Meeting19 /Dmitry V.Naumov Distribution of shifts of with 5 muons of 4 GeV

04/04/2008LNGS, OPERA Collaboration Meeting20 /Dmitry V.Naumov Distribution of shifts of with 100 muons of 4 GeV

04/04/2008LNGS, OPERA Collaboration Meeting21 /Dmitry V.Naumov Now take the realistic simulation by M.Sioli and study alignment precision as a function of exposure time and scanning volume PRELIMINARY

04/04/2008LNGS, OPERA Collaboration Meeting22 /Dmitry V.Naumov Now take the realistic simulation by M.Sioli and study alignment precision as a function of exposure time and scanning volume PRELIMINARY