Space-Resolved Spectrum Diagnose by Soft X-Ray Transmission Grating Spectrometer

A space-resolving transmission grating spectrometer is established on the “Shenguang-Ш” prototype laser facility and an iterative procedure for unfolding the x-ray spectrum with spatial resolution is described. The diagnostics is applied to measure the x-ray spectrum from laser-entered gold target and the typical space-resolved spectrum is provided. The relative standard uncertainty of the x-ray spectrum from the laser-generated plasma is also determined.