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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 at
https://doi.org/10.57760/sciencedb.j00213.00153 .-
Keywords:
- radiative opacity /
- inertial confinement fusion /
- absorption spectra
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图 1 实验排布示意图
Figure 1. Schematic of the experimental setup.
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
Figure 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
Figure 3. Temperature and density profile of the CH sample at 0.65 ns.
图 4 空间分辨的X光吸收与背光源谱图像
Figure 4. Space-resolved X-ray absorption and backlighter spectra.
图 5 (a)实验背光源谱与吸收谱; (b)实验与理论透过率光谱的比较
Figure 5. (a)Experimental backlighter and absorption spectra; (b)the comparisons of the measured transmission spectrum with the calculated result.
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