Two-dimensional time- and space-resolved diagnostic method for integrated implosion process

TL;DR

This paper introduces a novel 2D diagnostic method combining ultrafast photography and flux detection to accurately measure X-ray evolution during laser fusion implosions, improving spatial and temporal resolution.

Contribution

The paper presents a new combined diagnostic technique that enhances 2D imaging of implosion processes, outperforming existing ultrafast imaging methods in laser fusion research.

Findings

Improved reconstruction quality with external SSRFD.

Better performance than CCD or streak camera alone.

Effective guidance for designing laser fusion diagnostics.

Abstract

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.