A single‐shot spectrograph for the soft x‐ray region

A novel spectrograph comprised of a transmission grating, toroidal mirror, and microchannel plate detector is presented here. It is capable of detecting spectra in the wavelength range from 5 to 150 A with a resolution of about 1.5 A. Owing it to high efficiency, even an x‐ray spectrum of a low‐energy laser produced plasma, i.e., emission of the order of 10−10 J/sr, can be measured in a single shot.