Temperature Control Simulation of Cryogenic Target Fabrication

In the temperature control process of cryogenic target fabrication for the inertial confinement fusion, the evolution of temperature distribution in the hohlraum was simulated in a two-dimensional (2D) axis-symmetric scheme by a computational fluid dynamics code (Fluent). The effect of the natural convection of the gas in the hohlraum on the target temperature distribution was studied. In order to reduce the roughness of the cryogenic target inner-surface, a sinusoidal oscillation of temperature applying to the cooling rings was simulated. The result shows the temperature variation of the target versus the temperature of the cooling rings for dynamic fast freeze.