IRES: US-Germany Joint Study of X-Ray Optics Thermomechanical Stability and Control

在这个由国际科学与工程办公室支持的IRES项目中，美国研究生和本科生将在南佛罗里达大学Alex Volinsky教授的指导下，与两个德国机构，德累斯顿工业大学和汉堡德国电子同步加速器（DESY）研究中心进行合作工程研究。在三年的时间里，共有15名美国学生将分成小组，利用有限元（FE）建模和x射线衍射实验来优化和控制x射线光学的热机械稳定性。学生们将在国际访问之前接受热力学建模和x射线衍射的特殊培训。国际合作者包括德累斯顿的Dirk Meyer教授和DESY的Dmitri Novikov教授。x射线光学加热是同步加速器和内部x射线源的主要问题，因为它会导致光束畸变，使光束调节成为一项具有挑战性的任务。只有一个摄氏度的表面温度变化会显著影响衍射x射线束的波长，使其无法使用。目前，液氮被用于冷却基于衍射的同步加速器光学系统，但通过设计改进和优化，本项目的结果可以显著提高x射线光学系统的热机械稳定性，而无需如此繁琐的操作条件。参与该项目的学生将在国际环境中获得宝贵的研究经验，有助于培养具有多学科和全球视野的新一代熟练技术劳动力。

In this IRES project supported by the Office of International Science and Engineering, U.S. graduate and undergraduate students under the direction of Professor Alex Volinsky at the University of South Florida will participate in a collaborative engineering research effort with two German institutions, the Technical University in Dresden and Deutsches Elektronen-Synchotron (DESY) research center in Hamburg. Over the course of three years a total of 15 U.S. students will work in teams on optimization and control of the thermomechanical stability of X-ray optics using both Finite Elements (FE) modeling and X-ray diffraction experiments. The students will receive special training in thermomechanical modeling and X-ray diffraction prior to their international visit. The international collaborators include Professor Dirk Meyer in Dresden and Professor Dmitri Novikov at DESY.Heating of X-ray optics is a major problem with synchrotrons and in-house X-ray sources, since it causes beam distortions and makes beam conditioning a challenging task. Only one degree Celsius change in surface temperature significantly affects the diffracted X-ray beam wavelength, rendering it unusable. Currently liquid nitrogen is used to cool diffraction-based synchrotron optics, but through design improvements and optimization the results of this project could help significantly to improve the thermomechanical stability of the X-ray optics without requiring such cumbersome operating conditions. The students involved in this project will gain an invaluable research experience in an international setting, helping contribute to the development of a new generation of a skilled technical workforce with a multidisciplinary and global perspective.