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激光靶耦合物理是激光聚变的重要组成部分,激光产生的X光在实验室中有着广泛的用途,激光产生X光的份额是靶设计中追求的一个重要指标。理论上摸清激光靶耦合的物理过程和它们的物理规律,可为惯性约束聚变靶设计和实验研究提供重要信息。激光靶耦合物理的理论研究包括激光吸收,束缚电子和自由电子的原子动力学现象,以及电子、离子温度脱离的非局部热动平衡辐射流体力学等问题,物理现象相当复杂。本工作利用“LTX-1” 程序较全面地研究了激光平面金靶耦合问题,弄清了激光产生X光的物理过程,发射机制,以及有关的数值定标规律,所得结果与国外发表的数据基本一致。在本文中还会给出了一些解析结果,并与数值计算作了比较。
Laser target coupling physics is an important part of laser fusion. The X-ray produced by laser has a wide range of applications in the laboratory. The share of X-ray generated by laser is an important target in the target design. Theoretically finding out the physical processes of laser target coupling and their physical laws can provide important information for the design and experimental research of inertial confinement fusion targets. The theoretical research of laser target coupling physics includes the atomic dynamic phenomena of laser absorption, bound electrons and free electrons, and the non-local thermodynamic equilibrium radiation hydrodynamics of electron and ion temperature separation. The physical phenomenon is quite complex. This work uses “LTX-1” program to comprehensively study the coupling problem of laser plane gold target, clarify the physical process and emission mechanism of laser generated X-ray, and the related numerical calibration rules. The results obtained are in good agreement with the published data Basically the same. Some analytical results are given in this paper and compared with numerical calculations.