Noun
English Wikipedia has an article on:hohlraumWikipedia
hohlraum (plural hohlraums)
(physics) A cavity whose walls are in thermodynamic equilibrium with the radiation emitted by the cavity
An Inertial confinement fusion target, which was a cylindrical hohlraum target of D-T, being compressed by the Nova Laser. Source: Internet
Direct-drive systems avoid the use of a hohlraum and thereby may be less expensive in fuel terms. Source: Internet
Moreover, Nuckolls' solution had the fuel dropped into a fixed hohlraum that would be re-used in a continual cycle, but at current energy levels the hohlraum is destroyed with every shot. Source: Internet
The capsule can be either inserted in a hohlraum (as above) and imploded in the indirect drive mode or irradiated directly with laser energy in the direct drive configuration. Source: Internet
The highest energy X-rays can be seen leaking through the hohlraum, represented here in orange/red. Source: Internet