Simulation on control of infrared volumetric heating rates in fuel layering

The infrared heating has been demonstrated as an effective technique for preparing uniform fuel ice in ICF cryotargets. A ray tracing program is used to simulate the infrared light propagation in hohlraum, and the volumetric heating rates of shell and fuel are obtained with different focus positions of infrared light. It is found that the volumetric heating rates of the shell and fuel can be adjusted by the focus positions of infrared light. Therefore, the temperature field of fuel required for fuel layering can be achieved by adjusting the focus positions of infrared light. This work is helpful for the future layering experiments of ICF cryotargets by infrared heating.