  To precisely measure and evaluate X-ray generation and evolution in a
hohlraum during an implosion process, we present a two-dimensional (2D) time-
and space-resolved diagnostic method by combining a compressed ultrafast
photography (CUP) system and a simplified version of space-resolving flux
detector (SSRFD). Numerical experiment results showed that the reconstruction
quality of the conventional CUP significantly improved owing to the addition of
the external SSRFD, especially when a coded mask with a large pixel size was
used in the CUP. Further, the performance of the CUP cooperation with the SSRFD
was better than that of adding an external charge-coupled device or streak
camera. Compared with existing ultrafast imaging techniques in laser fusion,
the proposed method has a prominent advantage of measuring the 2D evolution of
implosion by combining high temporal resolution of streak camera and high
spatial resolution of SSRFD; moreover, it can provide guidance for designing
diagnostic experiments in laser fusion research.
