论文部分内容阅读
提出了一种基于高次模式的谐振腔束团长度测量技术,新方法的谐振腔工作于高次本征模式TM0n0。这样的谐振腔拥有更大的腔体半径,从而移除了谐振腔半径必须大于束流管道半径这一原则带来的工作频率限制。为国家同步辐射实验室未来的正电子源设计了一台双腔束团长度监测器,讨论了谐振腔工作频率的选择并推导了束团长度的计算公式,监测器的谐振腔工作于TM020模式,其半径远大于使用TM010模式的传统方法,在CST软件中模拟的结果显示其束团长度测量精度好于7%。
A new technique for measuring the length of resonator bunch based on high-order mode is proposed. The new resonant cavity works in high-order intrinsic mode TM0n0. Such a resonator has a larger cavity radius, thereby removing the operating frequency limitation that the radius of the resonator must be larger than the radius of the beam pipe. For the future of national synchrotron radiation positronium source designed a dual-chamber bundle length monitor, discusses the selection of the operating frequency of the resonant cavity and deduces the formula of the length of the bundle, the monitor’s resonant cavity operates in the TM020 mode , The radius is much larger than the traditional method using the TM010 mode. The simulation results in CST software show that the measurement accuracy of the bunch length is better than 7%.