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辐射不透明度实验数据用于评估不透明度理论模型及其计算精度. 针对惯性约束聚变点火靶壳层材料碳的辐射不透明度数据研究需求, 本工作在神光III原型大型激光装置上开展了辐射加热碳等离子体的辐射不透明度实验研究. 实验中采用8路纳秒激光注入锥柱型金黑腔产生高温X光辐射场, 通过辐射场加热黑腔中心的CH薄膜产生高温等离子体, 并利用multi-1D程序模拟了等离子体的温度和密度时间演化过程. 采用空间分辨门控平焦场光栅谱仪结合第9路束匀滑面背光技术, 在同一发次中对背光经过CH半样品的吸收光谱和背光源谱进行测量. 最后, 将实验获得的碳离子(温度65 eV, 密度0.003 g/cm3)在300—500 eV能区的透过率谱与DCA/UTA光谱理论计算结果进行比较. 本文数据集可在
https://doi.org/10.57760/sciencedb.j00213.00153 中访问获取.Experimental opacity data are used to evaluate the opacity models and their accuracy of the calculated results. In order to study the opacity of carbon material in the shell of the inertial confinement fusion ignition target, the experimental study of the spectrally-resolved opacity of radiation heated carbon plasma is carried out on the Shenguang III prototype laser facility. Eight nanosecond lasers are injected into a conical-cylindrical gold hohlraum and converted into intense X-ray radiation, the high-temperature plasma is obtained by radiatively heating the CH film in the center of the hohlraum. Temporal evolutions of temperature and density of carbon plasma are simulated with the Multi-1D code. By using a spatially-resolved flat-field grating spectrometer combined with the ninth beam smoothing surface backlight technology, the absorption spectra and backlighter spectra of CH sample are measured in one shot. Finally, the experimental transmission spectra of carbon plasma (with a temperature of 65eV and density of 0.003 g/cm3) in a range of 300–500 eV are obtained and compared with the calculated results of a DCA/UTA opacity code. A The datasets presented in this paper are openly available athttps://doi.org/10.57760/sciencedb.j00213.00153 .-
Keywords:
- radiative opacity /
- inertial confinement fusion /
- absorption spectra
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图 2 CH样品的辐射流体力学模拟 (a)辐射温度时间演化; (b)温度和密度时间演化
Fig. 2. Hydrodynamic simulation of the CH sample: (a) The temporal evolution of radiation temperature at the sample; (b) the temporal evolutions of temperature and density.
图 3 0.65 ns时刻CH样品的温度密度空间分布
Fig. 3. Temperature and density profile of the CH sample at 0.65 ns.
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