The 25th International Congress on X-ray Optics and Microanalysis (ICXOM 25) was held from 5 to 9 August 2019 at The Westin Lombard Yorktown Center, Lombard IL (near Chicago), USA. The Congress was organized by scientists from the Clausthal University of Technology, the DESY, the Advanced Photon Source at Argonne National Laboratory (APS), and the University of Antwerp. The ICXOM congresses are dedicated to new developments in Synchrotron instrumentation and X-ray based microand nano-analysis. In 2019, the ICXOM joined exceptionally well with the Denver X-ray Conference (DXC) 68th edition. The latter is dedicated to newest developments and innovation in laboratory XRD and XRF. A salient feature of DXC is that it includes the largest and most diverse exhibition of X-ray instrumentation. The participants were allowed and welcome to attend all ICXOM and DCX sessions, no matter for which conference they registered. The joint plenary session on Wednesday, featuring several outstanding speakers emphasized the integrative motive of the event. More than 100 synchrotron (SR) users and beamline scientist from all over the world registered for the ICXOM 25. About 500 participants and vendors attended the joint event. The ICXOM 25 kicked off traditionally with a session on new developments in X-ray optics. Sophisticated improvements of nanofocusing optics were presented, e.g., the AberrationCorrected Optics for Diffraction-Limited Nanofocusing and Multilayer Laue Lenses for nanometer-scale resolution. It was emphasized how these outstanding advancements of X-ray optics benefit users research. Experiments at the novel X-ray Free-Electron Lasers require novel optics, like Multi-beam Diffractive Optics. Those were addressed in the optics session. On Tuesday afternoon the participants were invited to an outing to the Advanced Photon Source (APS) at Argonne National Laboratory (ANL) and an on-site session “Advanced XRF and SR nanoprobes”. Representatives from different SR-facilities illustrated newest developments at their facility. After this session, participants could choose between nine different tours of the APS to get an insight on new set-ups and capacities at the different beamlines (Figure 1). The tour at the APS was very well received by the audience. On Wednesday, August 7, ICXOM and DXC had a joint plenary session on “New Approaches in Imaging” organized by the ICXOM. It served as the plenary opening session of the DXC. The attendees of both conferences enjoyed three outstanding invited presentations. The first was given by Benjamin Hornberger about the Lyncean Compact Light Source. An inverse Compton scattering X-ray source offering a brilliance comparable to SR sources. The second talk was given by Florian Meirer from the University of Utrecht about nanoscopic chemistry of catalysts and the third by Gayle Woloschak from Northwestern University about how the capability for imaging ever smaller objects like single cells benefit modern medicine (Figure 2). The more specialized ICXOM sessions on Wednesday

中文翻译：

---

第 25 届国际 X 射线光学和微量分析大会 (ICXOM 25)

第 25 届国际 X 射线光学和微量分析大会 (ICXOM 25) 于 2019 年 8 月 5 日至 9 日在美国伊利诺伊州伦巴第（芝加哥附近）威斯汀伦巴底约克镇中心举行。大会由克劳斯塔尔理工大学、DESY、阿贡国家实验室 (APS) 先进光子源和安特卫普大学的科学家组织。ICXOM 大会致力于同步加速器仪器和基于 X 射线的微纳分析的新发展。2019 年，ICXOM 与第 68 届丹佛 X 射线会议 (DXC) 完美结合。后者致力于实验室 XRD 和 XRF 的最新发展和创新。DXC 的一个显着特点是它包括最大和最多样化的 X 射线仪器展览。参与者被允许并欢迎参加所有 ICXOM 和 DCX 会议，无论他们注册的是哪个会议。周三举行的联合全体会议有几位杰出的演讲者，强调了此次活动的综合动机。来自世界各地的 100 多名同步加速器 (SR) 用户和光束线科学家注册了 ICXOM 25。大约 500 名参与者和供应商参加了联合活动。ICXOM 25 以传统的 X 射线光学新发展会议拉开序幕。介绍了纳米聚焦光学器件的复杂改进，例如，用于衍射受限纳米聚焦的像差校正光学器件和用于纳米级分辨率的多层劳厄透镜。强调了 X 射线光学的这些杰出进步如何有益于用户研究。新型 X 射线自由电子激光器的实验需要新型光学器件，如多光束衍射光学器件。这些在光学会议中得到了解决。周二下午，参与者被邀请参加阿贡国家实验室 (ANL) 的高级光子源 (APS) 郊游和现场会议“高级 XRF 和 SR 纳米探针”。来自不同 SR 设施的代表展示了他们设施的最新发展。在本次会议之后，参与者可以在 APS 的九个不同游览中进行选择，以深入了解不同光束线的新设置和容量（图 1）。在APS的巡演受到了观众的热烈欢迎。8 月 7 日星期三，ICXOM 和 DXC 举行了由 ICXOM 组织的关于“成像新方法”的联合全体会议。它作为 DXC 的全体开幕会议。两场会议的与会者都享受了三场精彩的特邀报告。第一个是 Benjamin Hornberger 关于 Lyncean Compact Light Source 的介绍。逆康普顿散射 X 射线源提供与 SR 源相当的亮度。第二次演讲由乌得勒支大学的 Florian Meirer 发表，关于催化剂的纳米级化学，第三次演讲由西北大学的 Gayle Woloschak 发表，关于对更小的物体（如单细胞）成像的能力如何有益于现代医学（图 2）。周三更专业的 ICXOM 会议 第二次演讲由乌得勒支大学的 Florian Meirer 发表，关于催化剂的纳米级化学，第三次演讲由西北大学的 Gayle Woloschak 发表，关于对更小的物体（如单细胞）成像的能力如何有益于现代医学（图 2）。周三更专业的 ICXOM 会议 第二次演讲由乌得勒支大学的 Florian Meirer 发表，关于催化剂的纳米级化学，第三次演讲由西北大学的 Gayle Woloschak 发表，关于对更小的物体（如单细胞）成像的能力如何有益于现代医学（图 2）。周三更专业的 ICXOM 会议