Time-evolution of X-ray emission nonuniformity in X-ray laser medium

Summary form only given. We report in this paper the results of time-evolution X-ray emisson nonuniformity of Ti plasma produced under uniform line-shaped irradiation (the nonuniformity of the laser irradiation is within 5%). The spatially and time resolved 2-D images of Ti and Si X-ray emission have been obtained with a pinhole transmission grating spectrograph coupled with an X-ray streak camera (30 ps time resolution).