论文部分内容阅读
激光与等离子体相互作用研究是惯性约束聚变(ICF)研究中的重要研究内容.为了定量研究神光Ⅲ原型实验中激光与等离子体互作用产生的散射光能量和光谱,研制了全孔径和近背向散射诊断系统,并介绍了全孔径和近背反测量系统的光路结构.对采用连续相位板技术后引起的激光焦斑变化进行了分析.介绍了采用全孔径和近背向散射诊断系统在神光Ⅲ原型上完成的考核束匀滑实验效果的实验,对比了使用束匀滑前后背向散射系统获得的散射光份额和散射光谱分布.实验发现,在神光Ⅲ原型使用800 J能量8束打靶的条件下,使用束匀滑后背向散射光份额可以降低到5%以下,其散射光谱也更加集中.这些数据为黑腔能量学等研究的进一步发展起到重要的促进作用.
The interaction between laser and plasma is an important research topic in the research of inertial confinement fusion (ICF) .In order to quantitatively study the energy and spectrum of scattered light generated by the interaction between laser and plasma in SG prototype experiment, Backscatter diagnosis system and the optical structure of full aperture and near backscatter measurement system.The change of laser focal spot caused by the continuous phase plate technique is analyzed.It is introduced that the whole aperture and near backscatter diagnostic system Shen Guangguang prototype completed the test beam uniformity test experiment, compared with the beam backscattering before and after the beam backscattering system to obtain the fraction of scattered light and scattered light spectrum of the experiment found that the prototype SG used 800 J energy 8 Under the condition of beam target, the backscattered light share can be reduced to less than 5% after beam smoothing, and the scattering spectra are more concentrated.These data play an important role in the further development of black cavity energetics and other research.