4th International Summer School « Nuclear Physics Methods and Accelerators in Biology and Medicine » Monte-Carlo simulations : FLUKA vs. MCNPX Maxime ODEN.

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Presentation transcript:

4th International Summer School « Nuclear Physics Methods and Accelerators in Biology and Medicine » Monte-Carlo simulations : FLUKA vs. MCNPX Maxime ODEN – École des Mines de Nantes (France) Spectroscopy dpt., Nuclear Physics Institute of ASCR Antonín Krása, Mitja Majerle, Ondřej Svoboda, Vladimír Wagner Energy plus Transmutation for the Energy plus Transmutation collaboration

Introduction  Experiments are carried out at JINR to study spallation p + Pb => spallation reaction  Detection of neutron with to activation detectors (Au, Al, Bi).  Activation foils activities are measured thanks to a germanium detector. Maxime ODEN - École des Mines de Nantes - Nuclear Physics Institute of ASCR

Phasotron experiment - bare Pb target Lead target Beam : proton 660 MeV

Energy plus Transmutation Set-up Maxime ODEN - École des Mines de Nantes - Nuclear Physics Institute of ASCR target: Pb (28.66 kg) blanket: U (206.4 kg) shielding: Cd + (CH 2 ) n Beam : proton 0.7/1/ 1.5 /2 GeV deuteron 1.6 / 2.52 GeV

Energy plus Transmutation Set-up

MCNPX Simulation  The obtained experimental data are used to check prediction from MCNPX (a computer simulation code based on Monte Carlo method)  MCNPX can calculate neutrons fluence where the detectors are set up  Neutron fluence multiplied by cross-sections for activation reaction give simulated activation results  Results compared to experimental results show discrepancies at higher energies (1.5 GeV and 2 GeV)

MCNPX Simulation  Ratio between experiment and MCNPX simulation results :

FLUKA Simulation  Verify experiments with FLUKA code: Spectrum in phasotron experiment Reaction rate in radial detectors  Two ways to calculate activation results: Multiplication with cross-sections RESNUCLEi function

FLUKA Simulation  neutrons fluence  Phasotron experiment with proton beam (660MeV) MCNPX FLUKA

FLUKA Simulation Energy plus Transmutation Front view Side view Radial detectors (gold foils)

FLUKA Simulation  Ratio between experiment and FLUKA simulation results (manual mutliplication): ratio Radial distance (cm)

FLUKA Simulation II  Ratio between experiment and FLUKA simulation results with RESNUCLEi scoring card: ratio Radial distance (cm)

Conclusion  FLUKA results checked by comparison with MNCPX  FLUKA and MCNPX are expected to give similar results Maxime ODEN - École des Mines de Nantes - Nuclear Physics Institute of ASCR Thank you for your attention