Comparison of radiation damage between FLUKA and Geant

• Photon energy spectrum used in the simulations (photon flux corresponds to high-luminosity run)

• Silicon damage function used by FLUKA

• Particle spectra through the SiPM

RADCON GEANT

FLUKA

File:.particle spectra.jpg

FLUKA

• Particle fluences around barrel calorimeter in terms of 1-MeV equivalent neutrons in Si

FLUKA. Beam power at the target = 0.704 W

FLUKA. Beam power at the target = 0.704 W

• Total 1-MeV (Si) neutron equivalent fluence in Si PM plane

FLUKA. Si PM limited by two circles with radii of 65 cm and 90 cm

• Particle fluences in Hall D in terms of 1-MeV equivalent neutrons in Si

FLUKA. Beam power at the target = 0.704 W

FLUKA. Beam power at the target = 0.704 W

• Particles per cm^2 per second in terms of 1-MeV neutron equivalent in Si estimated with FLUKA simulation (Photon beam power at target = .704 W)

Total	Neutrons	Protons	Pions	Electrons	Positrons
22.95 ± 0.18	18.07 ± 0.13	1.72 ± 0.02	1.81 ± 0.01	1.01 ± 0.20	0.19 ± 0.03

• Neutron flux in terms of 1-MeV equivalent neutrons in Si estimated with Geant simulation: 30.5 cm^-2 sec^-1.

• FLUKA geometry and input files: http://www.jlab.org/~georgek/halld/