Frontiers in High- Resolution X- Ray Diagnostics of Plasmas 2.Time- and Space-Resolved Spectroscopic Imaging Diagnostics of Laser-Produced Plasmas 2.1 Imaging Diagnostics of Laser-Produced Plasmas with High Spatial and Temporal Resolutions Obtained by Image-Sampling Technique

Abstract

We have developed a wide variety of one- (1D) and two-dimensional (2D) image sampling techniques coupled with x-ray streak cameras for ultrafast x-ray imaging. As 1D sampling, a multi-image x-ray streak camera (MIXS) was developed and successfully utilized for diagnosing the uniformity and heating process of laser-imploded core plasmas with time and space resolutions of 10 ps (equivalent to 10¹¹ frames/sec) and 10 µm, respectively. Two types of spectroscopic application of the MIXS have been developed. One is multi-channel MIXS (McMIXS), which has various spectral responses for time-resolved 2D temperature measurement. The other is monochromatic MIXS (M-MIXS), useful for temperature, density, and material mixing measurement, in which monochromatic images made with Bragg crystal are coupled to MIXS. 2D image sampling on an x-ray streak camera (2D-SIXS) has also been developed. Such ultrafast x-ray imaging is of great importance for diagnosing laser-produced plasmas such as imploded core plasma of inertial confinement fusion and ultrashort-laser-irradiated plasma.