Response of National Ignition Facility First Wall Materials to Target X Rays and Debris

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 materials by target explosions must be minimized. Computer simulations have been performed of the response of target chamber wall materials and laser debris shields to the target explosions. Additionally the deposition of tritium from the targets in the wall and optical materials have been calculated.