摘要详情

ID / 提交时间

155 / 2026-03-31 21:19:49

标题

Grazing-Incidence Multilayer Optics for High-Resolution X-Rays Imaging of Laser-Plasma Above 10 keV

关键字

plasma diagnostics,grazing incidence,depth-graded multilayers,X-ray imaging,hard x-rays

主题及专题

激光与粒子束聚变、磁驱动聚变 > 实验与诊断技术

状态

摘要录用

作者

Shengzhen Yi / Tongji University

秋实黄 / 同济大学物理科学与工程学院精密光学系

哲张 / 同济大学

润泽齐 / 同济大学

众张 / 同济大学

Zhanshan Wang / Tongji University

摘要

High-resolution hard X-ray imaging above 10 keV has become critical for observing spatial and temporal process of high energy density laser plasma. Grazing-incidence multilayer optics featuring high resolution and collection efficiency have emerged as the ideal approach for precision hard X-ray imaging. The spectral response of conventional periodic multilayers exhibits high sensitivity to multiple parameter variations, severely limiting their imaging brightness and uniformity in hard X-ray grazing-incidence imaging applications. This paper reports our recent progress in developing multilayer Kirkpatrick-Baez (KB) systems for diagnosing laser-produced plasmas in the >10 keV energy region, including: (1) For weak-source, small-field-of-view diagnostics above 10 keV, we developed a high-numerical-aperture Mo Kα-line (17.48 keV) periodic multilayer KB system based on a small-curvature-radius, short-working-distance configuration, achieving a four-fold improvement in effective collection efficiency compared to conventional designs and demonstrating 5 μm spatial resolution at the Xingguang-III facility; (2)To address high-energy imaging requirements on Mo Kα-line over hundreds of micrometers, we developed a depth-graded multilayer KB system that effectively enhances brightness uniformity across the field of view, achieving intensity response uniformity better than 10% within a 300 μm field of view; (3) Departing from the conventional KB design paradigm that prioritizes short working distances for higher collection efficiency, we developed a long-working-distance configuration that reduces the angular bandwidth requirements for the imaging field of view, significantly improving the reflectivity of depth-graded multilayer KB systems without compromising spatial resolution or geometric efficiency, thereby increasing effective collection efficiency by at least two-fold.