论文部分内容阅读
神光II激光装置升级完成后,激光能量将大幅提高,同时配备皮秒拍瓦激光束,能够满足快点火研究在万焦耳级平台开展集成实验的需求.神光II升级装置设计原则是以间接驱动为主,兼顾直接驱动.尽管直接驱动只是替代方案,然而由于直接驱动在快点火预压缩中具备一定优势,如能量利用率较高、对快点火导引锥预热较少、便于诊断等,因此需要探索基于神光II升级装置的直接驱动快点火靶设计.本文针对神光II升级装置的激光条件,利用辐射流体程序Multi1D对集成实验用快点火直接驱动靶的尺寸进行了初步内爆压缩设计和优化.在激光条件固定的情况下,优化无充气单层靶球的半径、厚度,尽可能实现高的密度、面密度.得到最优靶参数为外半径420μm,壳层厚度35μm,与靶球定标关系验证一致.根据超热电子定标关系,计算表明压缩过程实现的最高面密度与皮秒拍瓦激光产生的超热电子射程基本匹配.
ShenGuang II laser device upgrade is completed, the laser energy will be substantially increased, while the picosecond beat watt laser beam, to meet the fast fire research in 10,000 Joule-level platform to carry out the integration of the experimental requirements.Skin II upgrade device design principles are indirect Driven, taking into account the direct drive.Although the direct drive is only an alternative, but because of the direct drive in the fast fire pre-compression has some advantages, such as higher energy efficiency, quick fire guide cone less preheating, easy diagnosis , So it is necessary to explore the direct-drive fast-fire target design based on the SG-II upgrade device.In this paper, based on the laser conditions of the SG-II upgrade device, a preliminary implosion of the size of the direct fire-driven target for the integration experiment was preliminary explored by using the radiation fluid program Multi1D Compression design and optimization.When the laser condition is fixed, the radius and thickness of the non-aerated monolayer target ball are optimized and the high density and areal density are achieved as far as possible.The optimal target parameters are the outer radius of 420μm, the shell thickness of 35μm, And the calibration of the relationship between the target ball is consistent.According to the super-electron scaling relationship, the calculation shows that the compression process to achieve the highest surface density and picosecond watt laser production The basic range of hot electron match.