Apochromatic X-ray focusing  

作　　者：Umut T.Sanli Griin Rodgers Marie-Christine Zdoraol Peng Qio Jan Garrevoet Ken Vidar Falch Bert Muller Christian David Joan Vila-Comamala 

机构地区：[1]Paul Scherrer Institute,Laboratory for X-ray Nanoscience and Technologies,Forschungsstrasse 111,5232 Viligen,Switzerland [2]Biomaterials Science Center,Department of Biomedical Engineering,University of Basel,Hegenheimermattweg 167 B,4123 Allschwil,Switzerland [3]Deutsches Elektronen-Synchrotron DESY,Notkestr.85,22607 Hamburg,Germany

出　　处：《Light(Science & Applications)》2023年第7期1301-1308,共8页光（科学与应用)（英文版）

基　　金：funding from the European Union's Horizon 2020 research and innovation program under the Marie Sktodowska-Curie grant agreement No 884104(PSIFELLOW--3i);funding through the Swiss Nanoscience Institute Argovia project 16.01 ACHROMATIX.Parts of this research were carried out at beamline PO6 at PETRA I,DESY(Hamburg,Germany),a member of the Helmholtz Association HGF(proposal I-20210938 EC);supported in part by the Maxwell computational resources operated at Deutsches Elektronen-Synchrotron DESY,Hamburg,Germany.

摘　　要：Achromatic doublets are combinations of two individual lenses designed to focus different wavelengths of light in the same position.Apochromatic optics are improved versions of the achromatic schemes which extend the wavelength range significantly.Both achromatic and apochromatic optics are well-established for visible light.However,X-ray achromatic lenses did not exist until very recently,and X-ray apochromatic lenses have never been experimentally demonstrated.Here,we create an X-ray apochromatic lens system using an appropriate combination of a Fresnel zone plate and a diverging compound refractive lens with a tuned separation distance.The energy-dependent performance of this apochromat was characterized at photon energies between 6.5 and 13.0 keV by ptychographic reconstruction of the focal spot and scanning transmission X-ray microscopy of a resolution test sample.The apochromat delivered a reconstructed focal spot size of 940×740 nm^(2).The apochromatic combination shows a four-fold improvement in the chromatic aberration correction range compared to an achromatic doublet configuration.Thus,apochromatic X-ray optics have the potential to increase the focal spot intensity for a wide variety of X-ray applications.

关 键 词：CHROMATIC OPTICS CORRECTION 

分 类 号：O57[理学—粒子物理与原子核物理]