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Updated: Aug 6, 2026
Demonstration of Equal-Intensity Beam Generation by Dielectric Metasurfaces
Published on: June 7, 2019
Structure design and implementation of a water cooling sub-20 nm multilayer Kirkpatrick-Baez mirror system in the
Ruiying Liao1, Haihan Yu1,2, Jianye Wang1
1Multidisciplinary Research Center, Institute of High Energy Physics of the Chinese Academy of Sciences, Beijing, People's Republic of China.
Abstract:
The first water-cooling nano multilayer Kirkpatrick-Baez mirror system in the Structural Dynamics beamline (ID23) at High Energy Photon Source (HEPS) has been implemented. An Invar gantry is engineered to achieve a balance between light weight and stability. The cooling system, including eutectic gallium-indium (eGaIn), copper braids and a cooling water circuit with a multi-bend copper pipe in a compact space, decouples movement and mitigates vibration. The mirror cooling holders introduce less than 0.5 nm RMS height error and 0.1 µrad RMS slope error in the mirror surface shapes. A series of stability tests is applied to verify the mechanism structure. In a 1 h test assessment using a water-cooling flow of 4.5 L min-1, the system demonstrated a positional stability of 5.96 nm and an angular stability of 86.76 nrad from 1 Hz to 500 Hz. The focal spot size of 13.39 nm × 15.15 nm (H × V) at a photon energy of 21.8 keV demonstrates the system's performance.
