A four-channel Kirkpatrick Baez microscope working at multiple energy bands is developed for multiframe X-ray imaging diagnostics at the Shenguang-II laser facility. The response to the multiple energy bands is realized by coating the double-periodic multilayers on the reflected surfaces of the microscope. Because of the limited size of the microstrips in the X-ray framing camera, the image separation is controlled by the coni- cal angle of the reference cores during microscope assembly. This study describes the optical and multilayer design, assembly, and aligmnent of the developed microscope. The microscope achieves a spatial resolution of 4 5 gin in the laboratory and 10 20 ~tm at Shenguang-II laser facility within a 300 tim field of view. The versatile nature of the developed microscope enables the multiple microscopes currently installed in the laser facility to be replaced with a single, multipurpose microscope.
A time-resolved multispectral X-ray imaging approach with new version of multi-channel Kirkpatrick- Baez （KB） microscope is developed for laser plasma diagnostics at the kilo joule-class Shenguang-II laser facility （SG-II）. The microscope uses a total external reflection mirror in the sagittal direction and an array of multilayer mirrors in the tangential direction to obtain multiple individual high-resolution, high- throughput, and quasi-monochromatic X-ray images. The time evolution of the imploded target in multiple X-ray energy bands can be acquired when coupled with an X-ray streak camera. The experimental result of the time-resolved 2.5 and 3.0 keV dual-spectral self-emission imaging of the undoped CH shell target on SG-II is given.
