Backgrounds Multilayer film optics allow for the accurate characterization of high-energy-density plasmas produced in ICF implosions by capturing critical information—temporal, spatial, and spectral—of X rays, thereby enabling dynamic monitoring of the target. Such comprehensive diagnostics are essential for validating numerical models and understanding the key physics that ultimately determine implosion performance.
Purpose To address critical X-ray diagnostic applications in ICF research, this paper presents the design, fabrication, characterization, and implementation of high-performance multilayer film optics and systems capable of achieving imaging resolution better than 5 μm, including three critical components: Kirkpatrick-Baez (KB) mirrors, off-axis aspheric mirrors, and Wolter microscopes.
Methods Key advancements were achieved in X-ray optics, ranging from multi-channel KB mirrors for dual-mode diagnostics, precision-manufactured off-axis aspheres, and comprehensively engineered Wolter microscopes.
Results Key achievements include a spatial resolution of sub-5 μm using the multi-channel KB mirror system, an exceptional surface figure of 1.56 nm RMS and roughness <0.3 nm on a 50 mm length off-axis asphere via ion beam figuring, and the successful implementation of a full-process methodology for Wolter microscopes.
Conclusions Breakthroughs in the high-precision manufacturing of multilayer film optics and systems will provide robust technical support for plasma diagnostics in domestic ICF experiments.
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