1 / 21

BESIII MC Release notes & planned development Dengzy, Hem, Liuhm, Youzy, Yuany Nov. 23, 2005

BESIII MC Release notes & planned development Dengzy, Hem, Liuhm, Youzy, Yuany Nov. 23, 2005. What to cover?. Retrospect Release notes Performance Planned development.

gilbertrichardson
Download Presentation

BESIII MC Release notes & planned development Dengzy, Hem, Liuhm, Youzy, Yuany Nov. 23, 2005

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. BESIII MCRelease notes & planned developmentDengzy, Hem, Liuhm, Youzy, YuanyNov. 23, 2005

  2. What to cover? • Retrospect • Release notes • Performance • Planned development

  3. HEP Software FrameArchitecture and modules are now exp. dependentSIM: Fluka, Gheisha, …, G3, G4REC: Cleo, Belle, BaBarANA: Paw, Aida, … RootArchitecture: Basf, Root, Cobra, Gaudi

  4. physics e+ e- generator event tracking MC detector hit digitization digit data design reconstruction track MC efficiency analysis signal background

  5. BOOST Project BESIII Object Oriented Simulation Tool (proposal: August, 2002) BES MC Software Evolution BESI BESII BESIII SOBER SIMBES BOOST EGS G3 G4 1980s 1990s 2000s

  6. BOOST: 3 phases Phase 1: Framework prototype, simple geometry with hit Finished in May 2003 Phase 2: Detailed BESIII detector with simple digitization Finished in May 2004, digit outputs can be used to tune the reconstruction program Phase 3: Detailed digitization, data/MC comparisons Need information from beam test and data. We are here!

  7. BESIII offline software • Simulation: mimic experiment, as close as real • Reconstruction: retrieve physics quantities from data • Calibration: make possible corrections to data • Framework: provide common services to all modules • AnalysisTool: make physics analysis easier

  8. Release notes (sub-detectors) • MDC Geometry: small overlap detected, and corrected, dead-loop in tracking eliminated new MDC geometry passed test Digitization: wire resolution using two gaussians momentum resolution turns a bit smaller MCtruth: add more information, like LR ambiguity

  9. Release notes (sub-detectors) • TOF Geometry: new barrel double-layer structure, scintillator wrapper added end-cap TOF extruding problem solved Digitization: full detector response as default

  10. Release notes (sub-detectors) • EMC Geometry: support structure (cables) added Digitization: electronic noise added • MUC Geometry : using new alignment data

  11. Release notes (common parts) • Magnetic field Geant4 default parameters (step size, intersection) reused Momentum resolutions are ok for leptons and hadrons • Physics interaction BesPhysicsList: not stable for hadrons Geant4 recommended packages are used

  12. Release notes (common parts) • GDML (XML) Rewrite MUC & TOF, can be shared by REC MDC & EMC remain unchanged Use code to build BESIII detector in this release

  13. Performance (on lxplus) • Simulation speed Depends on event type Using Tester, Bhabha, Dimuon, Hadronic, inclusive J/Psi events Geant4.7.0 (BOSS), Geant4.7.1 (BOOST) CPU time, roughly, 1 second for one event No crash/dead-loop for about 50K events

  14. Performance (on lxplus) • Memory consumption Roughly 80M memory needed About 4M memory leak for 10K events Memory leak depends on particle type, mainly comes from G4 interaction packages

  15. Performance (on lxplus) • Physics quantities Key physics quantities/parameters checked momentum/time/energy resolutions, reconstruction efficiencies, … Satisfactory & understandable So far so good

  16. Planned development • Geometry – 12/2005 New EMC & MDC description • Magnetic field – 02/2006 3D field map in the whole detector propagation parameters optimization • Interaction packages – 12/2005 Different hadronic packages Standard and Low EM packages

  17. Planned development • Background simulation – 06/2006? Bianjg is working on it • Trigger simulation – 12/2006? Caogf will work on it • Move to new G4 and GDML – 01/2006? Gean4.7.1  Geant4.7.2 (12/2005) GDML1.0  GDML2.3.0 (08/2005)

  18. Planned development • Real detector simulation – 10/2006? Rethink about BESII scheme Using Calibration constants? Wire resolution/ efficiency, dead/hot channels, … • MCtruth binary output – 03/2006? Needed to save space • Detector response – 11/2005 … Long-term work

  19. If you have problem … • Judge before shouting Correct environment? Correct cards? Am I right? • Report to developers Crash? Dead-loop? Abnormity? • Discuss with experts Hard-to-understand resluts

  20. What is MC? doing experiment in computer 纸上谈兵 运筹帷幄 决胜千里

  21. Thank you!

More Related