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Instruments / Technical Area	Publication Details	Published	Actions
B16-Test Beamline Optics	A study of structural effects on the focusing and imaging performance of hard X-rays with 20–30 nm zone plates Xujie Tong , Vishal Dhamgaye , Qiucheng Chen , Qingxin Wu , Biao Deng , Ling Zhang , Oliver Fox , Hongchang Wang , Jun Zhao , Yifang Chen , Zijian Xu , Peng Li , Kawal Sawhney Journal Of Synchrotron Radiation 31 DOI: 10.1107/S1600577524009615 Diamond Proposal Number(s): [32834] Open Access Show Abstract ▼ Abstract: Hard X-ray microscopes with 20–30 nm spatial resolution ranges are an advanced tool for the inspection of materials at the nanoscale. However, the limited efficiency of the focusing optics, for example, a Fresnel zone plate (ZP) lens, can significantly reduce the power of a nanoprobe. Despite several reports on ZP lenses that focus hard X-rays with 20 nm resolution – mainly constructed by zone-doubling techniques – a systematic investigation into the limiting factors has not been reported. We report the structural effects on the focusing and imaging efficiency of 20–30 nm-resolution ZPs, employing a modified beam-propagation method. The zone width and the duty cycle (zone width/ring pitch) were optimized to achieve maximum efficiency, and a comparative analysis of the zone materials was conducted. The optimized zone structures were used in the fabrication of Pt-hydrogen silsesquioxane (HSQ) ZPs. The highest focusing efficiency of the Pt-HSQ-ZP with a resolution of 30 nm was 10% at 7 keV and >5% in the range 6–10 keV, whereas the highest efficiency of the Pt-HSQ-ZP with a resolution of 20 nm was realized at 7 keV with an efficiency of 7.6%. Optical characterization conducted at X-ray beamlines demonstrated significant enhancement of the focusing and imaging efficiency in a broader range of hard X-rays from 5 keV to 10 keV, demonstrating the potential application in hard X-ray focusing and imaging.	Nov 2024

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B16-Test Beamline
Optics

A study of structural effects on the focusing and imaging performance of hard X-rays with 20–30 nm zone plates