The measurement of high-space-resolving hotspot electron temperature in inertial confinement fusion is significant for characterizing ignition performance and deeply understanding the physics of the stagnation condition. However the space resolution of the electron temperature is only 10～25μm for more than 30 years, along with that the 30～60μm diameter hotspot is usually detected by multi-pinhole imaging. In this work, we developed 5μm-space-resolving two-dimensional detecting technique for the hotspot electron temperature using four-channel KB microscope coupled with different filters at 100 kJ laser facility. The detected average zero-dimension ion temperature and the theoretical one-dimension electron temperature profile are used as the boundary situations to extract the electron temperature. We found that the maximum intensities of the detected different-energy-band hotspot images could be used to obtain the coordinate interrelation of the images, in experiments and theoretical calculations. The results of the electron temperature distribution reveal obvious large gradient in the path from inner to outer, which is different with the commonly one-dimension simulation. That could be caused by three reasons include the extracting method, the intrinsic electron temperature gradient, and the implosion mix. In addition, we have given the relative uncertainty of the electron temperature measurement reaching 23%, and the improve orientations for the high-space-resolving electron temperature detecting technique.
 

5μm-space-resolving;,two-dimensional,hotspot electron temperature distribution