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题名	数兆焦激光驱动器靶场关键技术研究
作者	任磊
学位类别	博士
答辩日期	2016
授予单位	中国科学院上海光学精密机械研究所
导师	朱健强
关键词	惯性约束聚变 高功率激光驱动器 靶场 光束导引系统 腔靶
其他题名	Key technology research on the target area of a multi-mega-joule laser driver
中文摘要	根据聚变反应的两级内爆理论，在高功率激光驱动器中，产生的激光和实验用靶可以看作聚变反应的主级和次级，靶场系统实现了对主级的传输与控制，使其满足内爆压缩的条件。 美国国家点火装置在2013年未能成功点火，给我国建设新的激光驱动器，实现可控核聚变在激光路数和驱动方式上提出了新的挑战。本论文立足于驱动器靶场系统，重点研究更多激光路数，兼容多种驱动方式的靶场光路设计。对靶场光路设计的理论模型，排布过程中的激光数量，靶室大小，入射法兰口分布，组束选择，编组方式等进行了系统的分析和研究，从而为建立满足各种应用需求的激光驱动器提供参考。具体工作如下： 1. 建立了靶场光路总体设计的理论模型。从转变激光传输方向和保证所有光束等光程这两个基本功能出发，分别介绍了靶场光路中各相关单元的设计，包括靶室半径，激光入射法兰口的分布，组束的数量以及组束方式等。结合打靶激光的偏振态要求，光路无交叠等限制因素确定了单束组的导引结构；利用分层定基线算法，实现了多束组之间的编组。最后根据反射镜数量、靶场空间、驱动器占地面积等边界条件，确定靶场光路的整体构型。 2. 根据我室现有的激光装置（SG-II-UP和SG-9th）和场地条件，结合直接驱动和快点火等驱动方式的要求，设计了SG-II新靶场。利用靶场光路总体设计的理论模型，实现了32路面向直接驱动的靶场光路的排布。通过分析，新靶场可以完全兼容8路间接驱动柱腔靶以及长短脉冲结合的组合打靶方式，并且切换方式简单。 3. 为了验证不同的点火方式，设计了更大规模激光驱动器（288束，~3MJ）的靶场，并以间接驱动为基本打靶方式给出了整个靶场光路的排布。根据直接驱动和六端注入球腔靶激光入射法兰口的分布特点，实现了从间接驱动光路到这两种驱动方式之间的光路切换。六端注入球腔靶使用了288束中的176束，兼容效果良好，可以维持设计要求的球腔靶内壁辐照均匀性。 4. 以间接驱动为例，对聚变能源装置（576束，~5MJ）的靶场进行了概念设计。总结归纳了组束方式、靶室半径大小在激光路数不断增大过程中的变化规律，为后续建造各种规模的激光驱动器提供参考。最后，综述了聚变发电站中还需发展的其他靶场技术。
英文摘要	Based on the two-stage radiation implosion of fusion concept, in a high power laser driver, the high power laser and the target pellet can be thought as the primary and secondary of the fusion reaction. While the target area transports and modifies the high power laser to meet the requirements of radiation implosion. The National Ignition Facility of the USA failed to realize the laser-driven inertial confinement fusion, which prospered new challenge in laser beams and drive manners for our country to build an ICF facility and develop controllable fusion. This dissertation is based on the arrangement of the beam guiding system in the target area to meet the requirement of more laser beams and multiple irradiation configurations of targets. Analysis are focused on the theoretic model of beam-guiding system and the related parameters in arrangement, such as the beam quantity, target chamber size, beam ports distribution in the chamber, beam grouping and switch manner. These results will provide the reference for the laser drivers aiming at different kinds of applications. The detailed achievements are summarized as follows: 1. The theoretic model of beam-guiding system in the target area was built. Beam-guiding system transmits the lasers to a spherical geometry configuration and ensures that all the laser beams share the same light path length when they arrive at the target chamber center. Based on these two functions, researches were conducted on the target chamber size, beam ports distribution on the chamber, beam grouping and switch manner. Given the polarization of shooting lasers and no intersection among light path, the transmission models of single beam group were districted to two possible styles and the switch manner was calculated with a base-line algorithm. The final configuration of the target area was determined by overall consideration of quantity and styles of the total mirrors, the space size of the target area and the area the facility covers. 2. Based on the laser facility (SG-II-UP and SG-9th) and the construction conditions in our laboratory, a new target area capable of conducting direct drive and fast ignition were designed. The 32-beam direct drive beam guiding system of was arranged out according to the theoretic model. Through analyzing, we found it was also compatible with the original 8-beam indirect drive cylindrical hohlraums and drive manner with the combination of long and short pulses. 3. The target area of an ignition-verification ICF laser driver (288 beams, ~3MJ) was designed for the baseline. The arrangement was also compatible for direct-drive illumination and spherical hohlraum with six laser entrance holes (6LEHs). Based on the beam ports distribution of the direct-drive illumination and spherical hohlraum with six laser entrance holes (6LEHs), the light path switching from cylindrical hohlraums to these two targets was realized. Out of 288 beams, 176 beams are utilized for the spherical hohlraum with 6LEHs. Although the total laser energy is not fully used, the illumination symmetry of the spherical hohlraum can still be maintained. 4. The concept design of the target area of a laser-driven inertial fusion energy machine (576 beams, ~5MJ) was prospered. The entire BGS arrangement in the target area was figured out based on the indirect drive manner. Researches were conducted on the relationship between beam combination fashion and the radius of the target chamber as the beam quantity increases from several dozens to more than 500. This result will provide the reference for the newly-built facilities. In the end, several other technology was reviewed in the target area for a laser fusion power plant.
语种	中文
内容类型	学位论文
源URL	[http://ir.siom.ac.cn/handle/181231/15964]
专题	上海光学精密机械研究所_学位论文
推荐引用方式 GB/T 7714	任磊. 数兆焦激光驱动器靶场关键技术研究[D]. 中国科学院上海光学精密机械研究所. 2016.

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