A four-channel multilayer Kirkpatrick-Baez(KB) microscope is developed for the 8-keV X-ray imaging of experiments on laser inertial confinement fusion(ICF).A periodic multilayer that works at 8 keV and with a grazing incidence angle of 1.0° is coated on reflective surfaces to achieve a spatial resolution higher than 5μm and an effective solid angle higher than ～10-7sr.A precise assembly is realized by a conical reference cone to couple with an X-ray framing camera.This study provides detailed information on an optical and multilayer design,assembly method,and experimental results with a Cu X-ray tube.The instrument provides a high-resolution and high-throughput X-ray image for backlit or self-emission imaging of laser plasma at Cu Kαline radiation in Shenguang series laser facilities.
Optical design of nested conical Wolter I X-ray telescope covering energy band from 1 to 30 keV is investigated systematically. Recurrence relation of the nested structure is deduced, and the impact of the initial parameters on the performance is analyzed. Due to the need for hard X-ray astronomical observations in China, the initial structure is presented, for which six groups of W/B4C aperiodic multilayer coatings between the innermost and the outermost shell of the mirror are designed. The effective area, resolution, and field of view are calculated in the simulation. The results show that the effective area can achieve 71 cm2 and the field of view can achieve 13 at 30 keV. The resolution is estimated to be ～10 in half-power diameter.
