Abstract
Synchrotron radiation facilities are very important in different areas of fundamental and applied science to investigate structures or processes at small scales. Magnet–girder assemblies play a key role for the performance of such accelerator machines. High structural eigenfrequencies of the magnet–girder assemblies are required to assure a sufficient particle beam stability. The objective of the present parametric study was to numerically investigate and quantify the impact of different boundary conditions and components on the magnet–girder eigenfrequencies. As case studies, two 3 m long girder designs following the specifications of the PETRA IV project at DESY (German Electron Synchrotron, Hamburg, Germany) were selected. High magnet–girder assembly eigenfrequencies were achieved by, e.g., positioning the magnets close to the upper girder surface, increasing the connection stiffness between the magnets and the girder and between the girder and the bases, and positioning the girder support points as high as possible in the shape of a large triangle. Comparing the E/ρ ratio (E: Young’s modulus, ρ: material density) of different materials was used as a first approach to evaluate different materials for application to the girder. Based on the findings, general principles are recommended to be considered in the future girder design development processes.
Highlights
In the framework of various challenges human society is currently facing, e.g., climate change, the extinction of species, or the rapidly increasing population on earth, it is crucial to deeply understand complex biological, physical, and chemical processes in nature to find solutions for the challenges
The finite element method (FEM) model of the studied magnet–girder assembly considering the specifications of the 3 m long PETRA IV girder is described
Eigenfrequency decreases with increasing distance between the magnets and the girder were obtained for both girder geometries (Figure 14)
Summary
In the framework of various challenges human society is currently facing, e.g., climate change, the extinction of species, or the rapidly increasing population on earth, it is crucial to deeply understand complex biological, physical, and chemical processes in nature to find solutions for the challenges. As synchrotron radiation sources allow the investigation of structures, materials, and processes in different time and length scales in situ/in vivo, they are essential to create a deeper understanding of nature [1]. The synchrotron radiation technology plays a key role in engineering science, permitting, for example, a detailed analysis of the structure solidification process of alloys [5] or the in situ analyses of metal additive manufacturing [6]. Aside from using the synchrotron radiation sources in different areas of investigation, synchrotron radiation facilities involve many other research fields, e.g., the interdisciplinary research related to the installation and the setup of the accelerator machine and the beamlines. The present study contributes to the research on the accelerator machine setup, which is very important to ensure a stable particle beam. Synchrotron radiation facilities are used in many different disciplines and are very important to find solutions for today’s challenges
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