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Development of a standard library of background simulation codes

Development of a standard library of background simulation codes. JRA1 WP2. Annex I description of work. Specific objectives Participants 4 years execution plan Special Cross-links. Specific objectives.

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Development of a standard library of background simulation codes

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  1. Development of a standard library of background simulation codes JRA1 WP2

  2. Annex Idescription of work • Specific objectives • Participants • 4 years execution plan • Special Cross-links IDM2004 Gloria Luzón (LSC)

  3. Specific objectives • To produce a reliable and well tested Monte Carlo library of simulation codes to identify and quantify the components of the various environmental backgrounds in underground sites as well as in a variety of experiments and conditions, with a view to interpreting current data and designing new underground experiments. • The joint research effort should optimise the know-how of the different participants; experimental results from WP1 will be essential to validate the library codes. • A coherent and tested library codes will be made available for the users of the Labs; The codes will be interfaced with the database from WP1. IDM2004 Gloria Luzón (LSC)

  4. Participants IDM2004 Gloria Luzón (LSC)

  5. Other entities foreseen to contribute IDM2004 Gloria Luzón (LSC)

  6. Year 1 • Existing codes compared and discussed. • Platform, language and structure of the library fixed. • First set of MC codes for relevant background components and instrumentation ready. Tasks • First “test” version of MC libraries implemented. • Technical report prepared. Milestones and deliverables IDM2004 Gloria Luzón (LSC)

  7. Year 2 • MC codes tested on second survey of background measurements from WP1. • Program of refinement of the codes and documentation defined. Tasks • Second “test” version of standard MC libraries implemented (completely tested on data from WP1 • Technical report prepared. Milestones and deliverables IDM2004 Gloria Luzón (LSC)

  8. Year 3 • MC tested on second survey of background measurements from WP1 Tasks • Final version of standard MC codes implemented on computing infrastructures of each lab. Milestones and deliverables IDM2004 Gloria Luzón (LSC)

  9. Year 4 • Open the MC library to the Underground Lab users. • Complete and make available to the users the relevant documentation. Tasks Milestones and deliverables • MC library to the Underground Lab users. • Complete documentation available. IDM2004 Gloria Luzón (LSC)

  10. Special Cross-links JRA1-WP2 Development of a standard library of background simulation codes JRA2(IDEA) WP3-B1 N3-BSNS Background Simulation, Neutron-Shield and Muon-Vetos Study on Cosmogenic Induced Activity IDM2004 Gloria Luzón (LSC)

  11. Departure line • Identified sources of background • Some standard codes • Publications • Comparison with experimental data IDM2004 Gloria Luzón (LSC)

  12. Sources of background Additional sources Radon Surface Cosmogenic activation rock Rock and materials Contamination Alpha, Beta Gamma Neutrons: fission and a,n Cosmic Rays Muons m-induced Neutrons Detector IDM2004 Gloria Luzón (LSC)

  13. Standard Codes • Alpha, beta and gamma background Widely used GEANT4 Advanced example for underground physics IDM2004 Gloria Luzón (LSC)

  14. Standard Codes Neutron background Measurement n at lab Rate and spectrum for 238U fission and (a,n) n flux and spectrum at lab counting rates at detector rock activity Theory Calculation SOURCES FLUKA MCNP GEANT4 FLUKA MCNP GEANT4 IDM2004 Gloria Luzón (LSC)

  15. Measurement muons at lab Muon induced Neutron background Flux and spectrum for muons under-ground Flux and spectrum of induced neutrons counting rates at detector muons Calculation MUSIC, MUSUN, SIAM, FLUKA FLUKA modified -GEANT3 GEANT4 MCNP GEANT4 GEANT3 FLUKA IDM2004 Gloria Luzón (LSC)

  16. Other codes • Cosmogenic induced activity IDEA web- page http://idea.dipscfm.uninsubria.it/ IDM2004 Gloria Luzón (LSC)

  17. Publications • H. Wulandari et al. Proceedings of IDM2002 (York, UK, 2-6 September 2002), p. 464. • G. Chardin and G. Gerbier. Proceedings of IDM2002 (York, UK, 2-6 September 2002), p. 470. • V. Kudryavtsev et al. Proceedings of IDM2002 (York, UK, 2-6 September 2002), p. 476. • V. A. Kudryavtsev et al. NIM in Phys. Res. A, 505 (2003) 688. • G. Gerbier. Talk at TAUP-2003; see TAUP-2003 web-site. • S. Cebrian. Talk at TAUP-2003; see TAUP-2003 web-site. • H. Wulandari. PhD thesis – TUM (2003). • H. Wulandari et al, hep-ex/0401032 • H. Wulandari et al, Astrop. Phys. in press, hep-ex/0312050 • J. M. Carmona et al. Astr Phys. 21 (2004) 523.. • M. J. Carson et al. Astr. Phys. (2004), in press; hep-ph/0404042. IDM2004 Gloria Luzón (LSC)

  18. Comparison experimental results • Published neutron flux measurements at Gran Sasso, Modane, Canfranc, CPL (Korea) and others. • Planned neutron flux measurements at Gran Sasso, Modane, Canfranc, Boulby as proposed in JRA1 (ILIAS). • Measurements of muon-induced neutrons at various depths underground: neutron yields, energy spectra, lateral distributions etc.: LVD, KARMEN, LSD etc. • Measurements of muon-induced neutrons using active vetoes for dark matter detectors (existing and planned): Canfranc, Modane, Boulby, Gran Sasso. IDM2004 Gloria Luzón (LSC)

  19. First plan of work and deliverables • Analysis of MC codes. • Comparison experimental data • Deliverables IDM2004 Gloria Luzón (LSC)

  20. Analysis of MC codes • To identify the tasks for which the code is suitable. • To compare simulations results of different codes . • Problems, bugs and questions. IDM2004 Gloria Luzón (LSC)

  21. n flux and spectrum before detector Outputs from the simulations: to check Measurement n at lab Rate and spectrum for 238U fission and (a,n) Rate and spectrum for 238U fission and (a,n) n flux and spectrum at lab n flux and spectrum at lab counting rates at detector counting rates at detector rock activity Theory Calculation SOURCES MCNP GEANT4 MCNP GEANT4 IDM2004 Gloria Luzón (LSC)

  22. n yields Measurement muons at lab n flux and spectrum before detector Outputs from the simulations: to check Flux and spectrum for muons under-ground Flux and spectrum for muons under-ground Flux and spectrum of induced neutrons Flux and spectrum of induced neutrons counting rates at detector counting rates at detector muons Calculation MUSIC, MUSUN, SIAM, FLUKA FLUKA modified -GEANT3 GEANT4 MCNP GEANT4 GEANT3 FLUKA IDM2004 Gloria Luzón (LSC)

  23. Comparison experimental data • To compare, if possible, simulation results of each code with available experimental data. • To use the JRA1-WP1 data on background contributions to compare with codes simulations. IDM2004 Gloria Luzón (LSC)

  24. Inputs for the simulations: from JRA1/N2 Measurement n at lab Measurement n at lab Rate and spectrum for 238U fission and (a,n) n flux and spectrum at lab counting rates at detector rock activity rock activity Theory Calculation SOURCES MCNP GEANT4 MCNP GEANT4 IDM2004 Gloria Luzón (LSC)

  25. Physic model for neutrons: processes, data libraries, energy ranges • Geometry capabilities • Biasing options (to save CPU time) • Energy detection capabilities: nuclear recoil? • Support, availability of code source • … Relevant features of codes: to be examined Measurement n at lab Rate and spectrum for 238U fission and (a,n) n flux and spectrum at lab counting rates at detector rock activity Theory Calculation SOURCES MCNP GEANT4 MCNP GEANT4 MCNP GEANT4 MCNP GEANT4 IDM2004 Gloria Luzón (LSC)

  26. Measurement muons at lab • Physic model for neutrons: processes, data libraries, energy ranges • Physic model for muons: nuclear reactions? • Geometry capabilities • Biasing options (to save CPU time) • Energy detection capabilities: nuclear recoil? • Support, availability of code source • … Relevant features of codes: to be examined Measurement n at lab Flux and spectrum for muons under-ground Flux and spectrum of induced neutrons counting rates at detector muons Calculation MUSIC, MUSUN, SIAM, FLUKA Calculation MUSIC, MUSUN, SIAM, FLUKA FLUKA modified -GEANT3 GEANT4 FLUKA modified -GEANT3 GEANT4 MCNP GEANT4 GEANT3 FLUKA MCNP GEANT4 GEANT3 FLUKA IDM2004 Gloria Luzón (LSC)

  27. Deliverables • To create a web-page for the working group with : • information about the code comparison and “evaluated” results. • A code repository containing the codes and modified programs To use the JRA1-WP1 data on background contributions to compare with codes simulations. • List of publications. • Technical report on the first analysis of codes IDM2004 Gloria Luzón (LSC)

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