The large fluxes of fusion neutrons produced in the Ignitor experiment can
cause severe damage to the most exposed components of the tokamak or of the
diagnostic system. In a simplified geometry model, the FLUKA and the MCNP-
4B Monte Carlo codes are used to evaluate the influence of the neutron sour
ce energy and the material composition on the energy deposition in these co
mponents. (C) 2001 Elsevier Science Ltd. All rights reserved.