Grazing incidence imaging spectrometer for use in inertial confinement fusion and radiation hydrodynamic experiments

Abstract

We present results from the newly developed grazing incidence imaging spectrometer (GIIS) from both TRIDENT and OMEGA experiments. This instrument was originally designed to measure electron temperature via isoelectronic line ratios on gas-filled targets, but in addition has other useful applications. GIIS is a planar crystal Bragg spectrometer that is mounted to a conventional x-ray framing camera with an array of pinholes and slits to collect spectrally integrated two-dimensional images as well as spectrally resolved one-dimensional images. We have successfully recorded x-ray spectra from 4.5–6 and 3.3–5keV from both planar foil experiments on TRIDENT and preheated hydrodynamic experiments on OMEGA. We report on the instrument design and will present preliminary results.