Structure Parametric Optimization and Mechanical Analysis of the MSe1 Septum Magnet

As one of the key components of synchrotron injection and extraction system, the coil of the septum is subjected to large electromagnetic force during excitation, resulting in inevitable deformation of the coil, which affects the safe and stable operation of the magnet. Therefore, it is necessary to conduct a detailed analysis of the failure mechanism of the coil during operation. In this paper, an improved septum magnet structure is proposed, which reduced the stress of the coil effectively. Furthermore, a refined model of the septum magnet is established based on finite element method, the electromagnetic field and deformation of the magnet under the operating state are simulated, more fine strain/stress profiles of the copper wire, insulation and epoxy have been obtained. And compared with the traditional homogenized model and measurement results, the results show that the refined model can reflect the mechanical response between the turns of the coils more effectively. According to the results, a septum magnet is developed, which effectively improves and extends the operating stability and service life than previous septum magnet.