Testing experiment of KBA X-ray microscope in laser prototype facility using Ni-grids

The KBA microscope imaging is simulated by ray-tracing calculation which can determine the direction of optical axis and obtain geometrical modulation tranfer function(GMTF) of KBA microscope.According to the simulation results, a new method is proposed for the aiming and adjustment of KBA microscope at the laser prototype facility using visible light as the simulated optical axis of KBA microscope. The precision of grazing angle is about 0.25°. Experiment of KBA microscope at the laser prototype facility is implemented using Ni-grids whose period is 20 μm, and clear X-ray image of grids is obtained by CCD camera.