NEUTRON OPTICS & SHIELDING GROUP NATALIIA CHERKASHYNA TAP MEETING 23 RD OF JANUARY, 2014 Latest Developments on Shielding and Backgrounds.

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Presentation transcript:

NEUTRON OPTICS & SHIELDING GROUP NATALIIA CHERKASHYNA TAP MEETING 23 RD OF JANUARY, 2014 Latest Developments on Shielding and Backgrounds

Projects & Plans

Shielding at ESS

Background issues: SNS, J-PARC, ISIS

Particle showers: electromagnetic vs. hadronic

Particle shower: electromagnetic & hadronic Hadronic Electromagnetic photons, electrons, positrons Fundamental interactions involved: electromagnetism  nucleons & other quark-composite particles  Fundamental interactions involved: strong nuclear

Particle shower = = Neutron: Proton: Quarks: Gluons: u d Photon: Charged particles:

GEANT neutrons  2.5 GeV Size: 2m x 2m x Z Z: from 0.1m to 3m General idea

Collaboration

Shielding materials IronSteelCopper

Shielding materials AluminumTungstenConcrete

Iron, copper and steel Copper Steel Iron

2m Fe + 0.7m Cu + 0.3m W

Z 1 = 3m Fe + 1m Cu + 0.4m W Z 2 = 2.5m Fe + 0.7m Cu + 0.3m W Z 3 = 2m Fe + 0.7m Cu + 0.3m W Z 4 = 2m C + 0.7m Cu + 0.3m W Z 5 = 1m Fe + 2m Concrete Combinations of different materials What’s next? Optimization algorithm coming soon

PSI (SINQ)

SINQ

Measurements at PSI (SINQ)

GEANT4 simulations Bands Modeling of a symmetric problem Energy cuts More details in geometry Running to improve the statistics

… TO BE CONTINUED BY DOUGLAS DI JULIO Not the end!

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