温度梯度对平面金壁发射能流平衡性的影响

Effect of temperature gradient on the non-equilibrium rate of flux emitted by plane gold wall

在激光惯性约束聚变(ICF)的辐射输运实验和理论研究中,输运管壁对于输运管内物质中的辐射能谱具有改造作用.文中利用一维平面模型模拟了柱形输运管壁的辐射能流发射行为,给出了输运管壁的辐射能流不平衡度的计算公式.结果表明,输运管壁内的电子温度梯度是引起输运管壁发射能流不平衡的原因.利用不平衡度这一概念对输运管壁发射能流的不平衡性做了定量研究,并在ICF辐射输运实验的温度范围内给出了估算公式.

In the theoretical and experimental research of radiation transport in inertial confinement fusion （ICF）,the radiation spectrum in the foam cylinder can be changed by the surrounding high-Z wall. In this paper,we simulated and studied the property of flux emitted by the high-Z wall using 1-D plane model. Our work shows that the gradient of electron temperature is the reason why spectrum of flux emitted by the high-Z wall deviates from equillibrium. In order to quantitatively study the property of flux emitted by the high-Z wall,we define the non-equilibrium rate and deduced its estimating formula in the temperature scale of ICF experiment.