分类： 核科学技术 >> 粒子加速器 提交时间： 2024-01-02
摘要： The Shanghai high-repetition-rate X-ray free-electron laser and extreme light facility (SHINE)operates at a maximum repetition rate of 1 MHz. Kicker magnets are key components thatdistribute electron bunches into three different undulator lines in a bunch-by-bunch mode. Thekicker field width must be less than the time interval between bunches. A lumped-inductancekicker prototype was developed using a vacuum chamber with a single-turn coil. The fullmagnetic-field strength was 0.005 T. This paper presents the requirements, designconsiderations, design parameters, magnetic field calculations, and measurements of the kickermagnets. The relevant experimental results are also presented. The pulse width of the magneticfield was approximately 600 ns, and the maximum operation repetition rate was 1 MHz. Thedeveloped kicker satisfies the requirements for the SHINE project. Finally, numerousrecommendations for the future optimization of kicker magnets are provided.
分类： 物理学 >> 核物理学 提交时间： 2021-02-25
摘要： In high energy resolution X-ray spectroscopy beamlines of synchrotron radiation (SR) facilities and laboratory XAS/XES spectrometer, it is important to keep X-ray spectrometer operating in optimal conditions. The adjusting process is normally very time consuming due to the irregular light source beam point, and it is difficult to get global optimum. This study aims to develop an intelligent adjusting system based on global optimization algorithm for spectrometers on SR beamlines and on laboratory x-ray source. First of all, based on the two dimensional experimental data, automatic adjustment process was established. Then the automatic optimization was applied to adjust X-ray spectrometer practically, and upgraded iteratively. The online testing is carried out on a self-developed laboratory XAS spectrometer. Online tests results show that this automatic adjustment process converges to the optimal solution quickly, and the convergence time is about several dozens to hundreds steps, more efficient than manual optimization process. After automatic adjustment, we can get correct X-ray absorption spectrum based on the adjusted spectrometer.
点击量
通过
点击量
下载量
评论
待评议
