Angular distribution of radiation temperature from a laser-driven hohlraum is vital for investigations on the radiation field inside the hohlraum,code validation,and predication of drive on the capsule in indirect-dri...Angular distribution of radiation temperature from a laser-driven hohlraum is vital for investigations on the radiation field inside the hohlraum,code validation,and predication of drive on the capsule in indirect-drive inertial confinement fusion.A modified version of the view-factor method including plasma filling is proposed,which improves the accuracy of the description of angular distribution of radiation temperature.Firstly,the radial velocity of the gold bubble motion is scaled from a simple data-based model in a gas-filled hohlraum experiment performed on a hundreds of kJ laser facility in China.Then,an equivalent radiative volume model is advanced to approximately characterize the contribution of the blow-off bubble in the new view-factor method incorporate into IRAD3D.The simulation shows reasonable agreement with experimental measurements in a gas-filled hollow hohlraum.Furthermore,the influence of the electron density and temperature distribution,and bubble velocity,is analyzed.The value of the method is that it can be used as an approximate'first-look'at hohlraum energy balance prior to a more detailed radiation hydrodynamic modeling.展开更多
基金supported by National Natural Science Foundation of China(Nos.11775204,11805186,11805187)Presidential Foundation of China Academy of Engineering Physics(No.YZJJLX2018011)。
文摘Angular distribution of radiation temperature from a laser-driven hohlraum is vital for investigations on the radiation field inside the hohlraum,code validation,and predication of drive on the capsule in indirect-drive inertial confinement fusion.A modified version of the view-factor method including plasma filling is proposed,which improves the accuracy of the description of angular distribution of radiation temperature.Firstly,the radial velocity of the gold bubble motion is scaled from a simple data-based model in a gas-filled hohlraum experiment performed on a hundreds of kJ laser facility in China.Then,an equivalent radiative volume model is advanced to approximately characterize the contribution of the blow-off bubble in the new view-factor method incorporate into IRAD3D.The simulation shows reasonable agreement with experimental measurements in a gas-filled hollow hohlraum.Furthermore,the influence of the electron density and temperature distribution,and bubble velocity,is analyzed.The value of the method is that it can be used as an approximate'first-look'at hohlraum energy balance prior to a more detailed radiation hydrodynamic modeling.
