Double-Diffraction X-Ray Imaging Camera: Final Report

摘要

A device designed for obtaining monochromatic images of laser-plasma x-ray sources via the double diffraction process has been constructed. Such imaging, which is monochromatic and of high resolution, could for the first time make possible a study of the hydrodynamic stability of laser-target implosions. As a first step in the realization of such a possibility, a camera had to be designed and fabricated, for the precise alignment of doubly-diffracting crystals in the OMEGA tank. The design constraints were: the instrument has to be positioned as close to the target as possible (which will maximize the imaging resolution), while avoiding damage from the target explosion as well as avoiding interference with neighboring laser beams and other measuring devices in the OMEGA tank. This called for a ''miniaturized'' x-ray camera. To enable multi-shot operation without the need to extract the instrument from the vacuum tank between successive shots, a motorized, remotely-controlled operation was called for. In the following we briefly describe the finished instrument and its testing. We enclose photographs and drawing pertaining to the imaging camera. (ERA citation 12:026327)