Hardened x-ray crystal spectrometer

In inertial confinement experiments, diagnostics will need to be protected against the effects of the harsh radiation environment. Either some heavy shielding must be included, or distance to the target must be increased suitably. To effect the latter, polycapillary lenses can be used to focus divergent broadband x-ray radiation coming from a target into a collimated beam in order to transport x-rays a few meters up to the entrance of a spectrometer. An x-ray spectrometer has been built including a polycapillary lens, a curved crystal and a streaked camera. This paper describes this diagnostic and will provide some preliminary results obtained in recent experiments at the LULI facility.