The radiation environment inside a halfraum during an actual shot is dynamic and complex: A simulation of a OMEGA shot 19526 (15 beams, 1 ns square pulse, 7 kJ, into a scale-1 halfraum)
Dante view; incident flux
Dante view; Temis
On-axis view; incident flux
Incident spectrum (and BB equivalent) onto witness plate
This series of simulations was performed using VisRad, a viewfactor code provided by Prism Computational Sciences. See http://www.prism-cs.com/Software/VisRad.htm