Influence of different targets on halfraum radiation source temperature

Hohlraums/halfraums are used as an intensive X-ray radiation sources in indirect drive inertial confinement fusion and high energy density physics experiments to study material properties and physical problems like radiation transport. The equivalent radiation temperatures of the hohlraums are different from those with experimental targets attached on the wall. Experiments are carried out to study influence of different types of foam-filled cylinders attached to the halfraum bottom and 3-8 eV increase of the halfraum radiation source temperature is found. The statistics show that the radiation temperatures are higher with longer and denser-foam-filled cylinders.