The target chamber of the National Ignition Facility must maintain an
environment in which the laser optics can remain clean enough to avoid
damage. Therefore melting and vaporization of target chamber material
s by target explosions must be minimized. Computer simulations have be
en performed of the response of target chamber wall materials and lase
r debris shields to the target explosions. Additionally the deposition
of tritium from the targets in the wall and optical materials have be
en calculated.