Study of the dynamic characteristics of the AC dipole-girder system for CSNS/RCS  

作　　者：刘仁洪 屈化民 张俊嵩 康玲 王莫托 王广源 王海静 

机构地区：[1]Institute of High Energy Physics, Chinese Academy of Sciences [2]University of Chinese Academy of Sciences

出　　处：《Chinese Physics C》2014年第7期106-111,共6页中国物理C（英文版）

摘　　要：China Spallation Neutron Source （CSNS） is a high intensity proton accelerator-based facility. Its acceler- ator complex includes two main parts： an H- linac and a rapid cycling synchrotron （RCS）. The RCS accumulates an 80 MeV proton beam and accelerates it to 1.6 GeV, with a repetition rate of 25 Hz. The AC dipole of the CSNS/RCS is operated at a 25 Hz sinusoidal alternating current which causes severe vibration. The vibration will influence the long-term safety and reliable operation of the magnet. The CSNS/RCS AC dipole-girder system takes vibration isolator to decrease the vibratory force and the vibration amplitude of the dipole. For the long-term safety and reliable operation of the dipole, it is very important to study the dynanfic characteristics of the dipole-girder system. This paper takes the dipole-girder as a specific model system. A method for studying the dynamic characteristics of the system is put forward by combining theoretical calculation with experimental testing. The modal parameters with and without vibration isolator of the dipole-girder system are obtained through ANSYS simulation and testing. Then, the dynamic response of the system is calculated with modal analysis and vibration testing data. With the simulation and testing method, the dynamic characteristics of the AC dipole-girder are studied.China Spallation Neutron Source （CSNS） is a high intensity proton accelerator-based facility. Its acceler- ator complex includes two main parts： an H- linac and a rapid cycling synchrotron （RCS）. The RCS accumulates an 80 MeV proton beam and accelerates it to 1.6 GeV, with a repetition rate of 25 Hz. The AC dipole of the CSNS/RCS is operated at a 25 Hz sinusoidal alternating current which causes severe vibration. The vibration will influence the long-term safety and reliable operation of the magnet. The CSNS/RCS AC dipole-girder system takes vibration isolator to decrease the vibratory force and the vibration amplitude of the dipole. For the long-term safety and reliable operation of the dipole, it is very important to study the dynanfic characteristics of the dipole-girder system. This paper takes the dipole-girder as a specific model system. A method for studying the dynamic characteristics of the system is put forward by combining theoretical calculation with experimental testing. The modal parameters with and without vibration isolator of the dipole-girder system are obtained through ANSYS simulation and testing. Then, the dynamic response of the system is calculated with modal analysis and vibration testing data. With the simulation and testing method, the dynamic characteristics of the AC dipole-girder are studied.

关 键 词：AC dipole GIRDER VIBRATION dynamic characteristics modal analysis dynamic response 

分 类 号：O571.53[理学—粒子物理与原子核物理]