中国物理B ›› 2011, Vol. 20 ›› Issue (6): 65202-065202.doi: 10.1088/1674-1056/20/6/065202
李永升1, 王峰2, 彭晓世2, 刘慎业2, 蒋小华2, 丁永坤2
Wang Feng (王峰)a, Peng Xiao-Shi (彭晓世)a, Liu Shen-Ye (刘慎业)a, Li Yong-Sheng (李永升)b, Jiang Xiao-Hua (蒋小华)a, Ding Yong-Kun (丁永坤)a
摘要: In indirect-drive experiment, the blank effect caused by X-rays from Hohlraum will show the dark area in time scale of optical streak camera (OSC). This blank effect, which was a serious problem in indirect-drive shock wave experiments, has been explained by the semiconductor model. The X-rays cause the band to band transition and the probe laser is absorbed by the intraband transition, which leads to a dark region in time scale of the OSC image. In the experiment, the reflectivity of shock wave front was measured to be about 50% at shock wave velocity 32 km/s and was compared to the theoretical calculations with the Drude free electron model. From the experimental data, it is found that the blank effect can be avoided at radiation temperature of 170 eV if the Al layer is thicker than 60 μm.
中图分类号: (Shock waves and discontinuities)