Abstract:

The details of the implosion compression hot spot was detected by the multi-channel Kirkpatrick- Baez microscope with high spatial resolution of about 3μm. The X-ray self emission of the hot spot is measured along the two orthogonal directions of the equator and the polar, and the spatial distribution of the two dimensional X-ray intensity is obtained. The X-ray image data show that the equatorial asymmetry component of the hot spot is larger than that of the polar about 8%. The P2 component in polar is 2μm larger than that in the equatorial region. This results show that the polar compressing of the hot spot is stronger than that in the equatorial region. It indicates that the radiation driven in polar region is stronger than that in the equatorial region, which causes the shape of the hot spot to be oblate at the implosion stagnation.

Key words: Kirkpatrick-Baez microscope, Spatial-resolution, Implosion hot spot, Hot spot asymmetry

摘要：

利用多通道Kirkpatrick-Baez 显微镜具有约3μm 的空间分辨能力，对内爆压缩热斑的细节可以进行空间分辨测量。通过赤道和极区两个正交方向对柱腔辐射驱动内爆热斑的X 射线自发射进行测量，获得了热斑区在两个正交方向的二维X 射线强度空间分布。X 射线图像数据处理结果表明，赤道区表征内爆热斑不对称性的2 P 分量比极区的约高8%，极区的0 P 分量比赤道区大2μm。内爆热斑在极区的压缩要强于赤道区，反映了极区的辐射驱动要比赤道区的强，这导致靶球在压缩停滞阶段形成的热斑形状呈扁椭球。

关键词: Kirkpatrick-Baez 显微镜, 空间分辨, 内爆热斑, 热斑不对称性