Development of a standard library of background simulation codes JRA1WP2 Gloria Luzon, [email protected] Canfranc Underground Laboratory

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


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.


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


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


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


Departure line

Identified sources of Identified sources of backgroundbackground

Some standard codesSome standard codesPublicationsPublicationsComparison with Comparison with

experimental dataexperimental data


Sources of background

rock

DetectorCosmic RaysMuons

-induced Neutrons

Rock and materials Contamination

Alpha, BetaGamma

Neutrons: fission and ,n

Additional sourcesRadonSurface

Cosmogenic activation


Standard Codes

• Alpha, beta and gamma background

Widely used GEANT4 GEANT4

Advanced example for underground physics


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


Muon induced Neutron background

Flux and spectrum

for muons under-ground

muons

Flux and spectrum

of induced neutrons


CalculationMUSIC, MUSIC, MUSUN, MUSUN, SIAM,SIAM,FLUKAFLUKA

MCNPMCNPGEANT4GEANT4GEANT3 GEANT3 FLUKAFLUKA

Measurement muons

at lab

FLUKAFLUKAmodified -modified -GEANT3GEANT3GEANT4GEANT4


Other codes• Cosmogenic induced activity

IDEA web- page

http://idea.dipscfm.uninsubria.it/


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.


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.


First plan of work and deliverables

Analysis of MC codes.Analysis of MC codes.Comparison experimental dataComparison experimental dataDeliverablesDeliverables


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.


Inputs for the simulations: from JRA1/N2


and (,n)

rock activit

y

n flux and

spectrum at lab



MCNPMCNPGEANT4GEANT4



rock activit

y



Relevant features of codes: to be examined


and (,n)

rock activit

y

n flux and

spectrum at lab






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• …


Flux and spectrum


muons

Flux and spectrum

of induced neutrons




Measurement muons

at lab


Relevant features of codes: to be examined


• 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• …





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.


Outputs from the simulations: to check


and (,n)

rock activit

y

n flux and

spectrum at lab







and (,n)

n flux and

spectrum at lab


n flux and spectrum before

detector


Flux and spectrum


muons

Flux and spectrum

of induced neutrons




Measurement muons

at lab


Flux and spectrum


Flux and spectrum

of induced neutrons


n flux and spectrum before

detector

n yields

Outputs from the simulations: to check


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


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

http://www.unizar.es/ilias


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).

Documents

Development of a standard library of background simulation codes JRA1WP2 Gloria Luzon, [email protected] Canfranc Underground Laboratory