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

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
24.7 ± 1.1	19.5 ± 0.9	1.8 ± 0.1	2.0 ± 0.1	0.9 ± 0.1	0.3 ± 0.1

• 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/