Bellow are some plots with the dose distributions in the experimental hall and the collimator cave which Pavel Degtiarenko produced using his GEANT simulation. Pavel's simulation is expected to provide more realistic production of neutrons in gamma(e) nucleus interactions.
Old collimator cave geometry implemented in Geant simulation ( 2007-12-07 )
New collimator cave geometry optimized with Geant simulation
Estimates of ionizing radiation doses in some areas of the collimator cave (needed to choose appropriate materials and position of electronics)