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Development of a standard Development of a standard library of background library of background
simulation codessimulation codes
JRA1JRA1WP2WP2
Gloria Luzon , [email protected] Underground Laboratory
18/04/23 IDM2004 Gloria Luzón (LSC)
Annex Idescription of work
Specific objectivesSpecific objectivesParticipantsParticipants4 years execution plan4 years execution planSpecial Cross-linksSpecial Cross-links
18/04/23 IDM2004 Gloria Luzón (LSC)
Specific objectivesSpecific objectives• To produce a reliable and well tested Monte To produce a reliable and well tested Monte
Carlo library of simulation codes to identify and Carlo library of simulation codes to identify and quantify the components of the various quantify the components of the various environmental backgrounds in underground sites environmental backgrounds in underground sites as well as in a variety of experiments and as well as in a variety of experiments and conditions, with a view to interpreting current conditions, with a view to interpreting current data and designing new underground data and designing new underground experiments.experiments.
• The joint research effort should optimise the know-how The joint research effort should optimise the know-how of the different participants; experimental results from of the different participants; experimental results from WP1 will be essential to validate the library codes.WP1 will be essential to validate the library codes.
• A coherent and tested library codes will be made A coherent and tested library codes will be made available for the users of the Labs; The codes will be available for the users of the Labs; The codes will be interfaced with the database from WP1.interfaced with the database from WP1.
18/04/23 IDM2004 Gloria Luzón (LSC)
ParticipantsParticipantsOrganisationOrganisation Short Short
namenameRoleRole
Universidad de Universidad de ZaragozaZaragoza
UNIZARUNIZAR •Coordination of WP2Coordination of WP2•Study and implementation of MC background simulation codes
University of University of SheffieldSheffield
USFDUSFD •Deputy coordination of Deputy coordination of WP2WP2•Study and implementation of MC background simulation codes
Commissariat à l’Energie Atomique &Centre National de la Recherche Scientifique
CEA &CNRS
•Study and implementation of MC background simulation codes
Istituto Nazionale di Fisica Nucleare
INFN •Study and implementation of MC background simulation codes
Technische Universität München
TUM •MC simulation codes for neutron background
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Other entities foreseen to Other entities foreseen to contributecontribute
OrganisationOrganisation Role: Contribution toRole: Contribution to
Rutherford Appleton Laboratory
•Study and test of MC background simulation codes
Forschungszentrum Karlsruhe
•Study and test of MC background simulation codes (neutrons)
University of Dortmund
•Study and test of MC background simulation codes (gammas and neutrons)
University of Silesia
•MC simulation codes for neutrons and muons
Politecnico di Milano
•Neutron background simulation
18/04/23 IDM2004 Gloria Luzón (LSC)
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
Tasks
• First “test” version of MC libraries implemented.
• Technical report prepared.
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Year 2• MC codes tested on second survey of
background measurements from WP1.• Program of refinement of the codes and
documentation defined. Tasks
Tasks
• Second “test” version of standard MC libraries implemented (completely tested on data from WP1
• Technical report prepared.
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Year 3• MC tested on second survey of
background measurements from WP1Tasks
Tasks
• Final version of standard MC codes implemented on computing infrastructures of each lab.
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Year 4• Open the MC library to the Underground
Lab users.• Complete and make available to the
users the relevant documentation.
Tasks
Tasks
• MC library to the Underground Lab users.
• Complete documentation available.
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Special Cross-linksJRA1-WP2JRA1-WP2
N3-N3-BSNSBSNS
JRA2(IDEA)JRA2(IDEA)WP3-B1WP3-B1
Development of a standard Development of a standard library of background library of background
simulation codessimulation codes
Background Background Simulation, Simulation,
Neutron-ShieldNeutron-Shield and Muon-Vetosand Muon-Vetos
Study on Study on CosmogenicCosmogenic
Induced ActivityInduced Activity
JRA1-JRA1-WP1,3,4WP1,3,4
18/04/23 IDM2004 Gloria Luzón (LSC)
Departure line
Identified sources of Identified sources of backgroundbackground
Some standard codesSome standard codesPublicationsPublicationsComparison with Comparison with
experimental dataexperimental data
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Sources of background
rock
DetectorCosmic RaysMuons
-induced Neutrons
Rock and materials Contamination
Alpha, BetaGamma
Neutrons: fission and ,n
Additional sourcesRadonSurface
Cosmogenic activation
18/04/23 IDM2004 Gloria Luzón (LSC)
Standard Codes
• Alpha, beta and gamma background
Widely used GEANT4 GEANT4
Advanced example for underground physics
18/04/23 IDM2004 Gloria Luzón (LSC)
Standard CodesNeutron background
Rate and spectrum for 238U fission
and (,n)
rock activit
y
n flux and
spectrum at lab
counting counting rates at rates at detectordetector
TheoryCalculationSOURCESSOURCES
FLUKAFLUKAMCNPMCNP
GEANT4GEANT4
Measurement n at lab
FLUKAFLUKAMCNPMCNP
GEANT4GEANT4
18/04/23 IDM2004 Gloria Luzón (LSC)
Muon induced Neutron background
Flux and spectrum
for muons under-ground
muons
Flux and spectrum
of induced neutrons
counting counting rates at rates at detectordetector
CalculationMUSIC, MUSIC, MUSUN, MUSUN, SIAM,SIAM,FLUKAFLUKA
MCNPMCNPGEANT4GEANT4GEANT3 GEANT3 FLUKAFLUKA
Measurement muons
at lab
FLUKAFLUKAmodified -modified -GEANT3GEANT3GEANT4GEANT4
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Other codes• Cosmogenic induced activity
IDEA web- page
http://idea.dipscfm.uninsubria.it/
18/04/23 IDM2004 Gloria Luzón (LSC)
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.
18/04/23 IDM2004 Gloria Luzón (LSC)
Comparison experimental results
• Published neutron flux measurements at Gran Sasso, Modane, Canfranc, CPL (Korea) and others.
• Planned background 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.
18/04/23 IDM2004 Gloria Luzón (LSC)
First plan of work and deliverables
Analysis of MC codes.Analysis of MC codes.Comparison experimental dataComparison experimental dataDeliverablesDeliverables
18/04/23 IDM2004 Gloria Luzón (LSC)
Analysis of MC codes
• To identify the tasks for which each code is suitable.
• To compare simulations results of different codes .
• Problems, bugs and open questions.
18/04/23 IDM2004 Gloria Luzón (LSC)
Inputs for the simulations: from JRA1/N2
Rate and spectrum for 238U fission
and (,n)
rock activit
y
n flux and
spectrum at lab
counting counting rates at rates at detectordetector
TheoryCalculationSOURCESSOURCES
MCNPMCNPGEANT4GEANT4
Measurement n at lab
MCNPMCNPGEANT4GEANT4
rock activit
y
Measurement n at lab
18/04/23 IDM2004 Gloria Luzón (LSC)
Relevant features of codes: to be examined
Rate and spectrum for 238U fission
and (,n)
rock activit
y
n flux and
spectrum at lab
counting counting rates at rates at detectordetector
TheoryCalculationSOURCESSOURCES
MCNPMCNPGEANT4GEANT4
Measurement n at lab
MCNPMCNPGEANT4GEANT4
MCNPMCNPFLUKAFLUKA
GEANT4GEANT4
MCNPMCNPFLUKAFLUKA
GEANT4GEANT4
• 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• …
18/04/23 IDM2004 Gloria Luzón (LSC)
Flux and spectrum
for muons under-ground
muons
Flux and spectrum
of induced neutrons
counting counting rates at rates at detectordetector
CalculationMUSIC, MUSIC, MUSUN, MUSUN, SIAM,SIAM,FLUKAFLUKA
MCNPMCNPGEANT4GEANT4GEANT3 GEANT3 FLUKAFLUKA
Measurement muons
at lab
FLUKAFLUKAmodified -modified -GEANT3GEANT3GEANT4GEANT4
Relevant features of codes: to be examined
Measurement n 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• …
CalculationMUSIC, MUSIC, MUSUN, MUSUN, SIAM,SIAM,FLUKAFLUKA
MCNPMCNPGEANT4GEANT4GEANT3 GEANT3 FLUKAFLUKA
FLUKAFLUKAmodified -modified -GEANT3GEANT3GEANT4GEANT4
18/04/23 IDM2004 Gloria Luzón (LSC)
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.
18/04/23 IDM2004 Gloria Luzón (LSC)
Outputs from the simulations: to check
Rate and spectrum for 238U fission
and (,n)
rock activit
y
n flux and
spectrum at lab
counting counting rates at rates at detectordetector
TheoryCalculationSOURCESSOURCES
MCNPMCNPGEANT4GEANT4
Measurement n at lab
MCNPMCNPGEANT4GEANT4
Rate and spectrum for 238U fission
and (,n)
n flux and
spectrum at lab
counting counting rates at rates at detectordetector
n flux and spectrum before
detector
18/04/23 IDM2004 Gloria Luzón (LSC)
Flux and spectrum
for muons under-ground
muons
Flux and spectrum
of induced neutrons
counting counting rates at rates at detectordetector
CalculationMUSIC, MUSIC, MUSUN, MUSUN, SIAM,SIAM,FLUKAFLUKA
MCNPMCNPGEANT4GEANT4GEANT3 GEANT3 FLUKAFLUKA
Measurement muons
at lab
FLUKAFLUKAmodified -modified -GEANT3GEANT3GEANT4GEANT4
Flux and spectrum
for muons under-ground
Flux and spectrum
of induced neutrons
counting counting rates at rates at detectordetector
n flux and spectrum before
detector
n yields
Outputs from the simulations: to check
18/04/23 IDM2004 Gloria Luzón (LSC)
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.– Links to WP1, WP3-4 for data.– List of publications.
• Technical report on the first analysis of codes
18/04/23 IDM2004 Gloria Luzón (LSC)
Our proposal to work Small working-groups in each Small working-groups in each
institute ( we would like names).institute ( we would like names). Creation of a distribution list.Creation of a distribution list. Every group should prepare informs Every group should prepare informs
about the codes they are using:about the codes they are using: Why a specific code has been used and Why a specific code has been used and
what for?what for? Main features of the code.Main features of the code. Comparison with experimental data.Comparison with experimental data. Comparison of codes.Comparison of codes. Problems, bug and open questions Problems, bug and open questions
detected.detected.Deadline will appear in Web page http://www.unizar.es/ilias~December 04
18/04/23 IDM2004 Gloria Luzón (LSC)
Collection of informs and Collection of informs and preparation of a first report.preparation of a first report.
Comments on the report.Comments on the report.First “test” of MC libraries.First “test” of MC libraries.Final technical report.Final technical report.Waiting for more data (and Waiting for more data (and
performing simulations to be performing simulations to be compared with these data).compared with these data).