An elliptical spectrograph/fiber‐array/streak camera system for remote time‐resolved spectral measurements in the x‐ray region

An elliptical spectrograph and a scintillator/fiber‐array detection system have been developed to provide time‐resolved measurements of the x‐ray spectra from a Z‐pinch plasma. The elliptical spectrograph (1.2‐m focal distance, eccentricity=0.9586) observes the 1‐keV region, covering a range of λ/2d=0.5–0.9. The detector consists of a thin scintillator butt‐coupled to a fiber optic array which transmits the signal to a streak camera in a remote location. This system provides continuous time history with temporal resolution of ∼3 ns, and a spectral resolving power of ∼165. The detection scheme is limited to spectral lines with intensities greater than ∼106 W/sr‐eV.