感应同步加速器纵向动力学初步研究

A preliminary study on beam longitude dynamics of an induction synchrotron

感应同步加速器能提高加速器的束流强度,而纵向动力学决定了加速器的工作原理,是研究新型加速器时必须首先考虑的。本文系统分析了感应同步加速器的纵向动力学,利用编制的ISync多粒子软件,进行了纵向动力学的模拟计算,计算结果与理论分析较为符合。模拟计算中分析了感应同步加速器中时间谱(相当于束流波形)密度的畸变和振荡的形成原因并提出了抑制方法。本文的研究工作可作为感应同步加速器进一步深入研究的基础。

These years, a new type of accelerator, namely induction synchrotron, has been a focus of improving the intensity of high energy ion beams. Combining the advantages of radio-frequency synchrotron and linear induction accelerator, an induction synchrotron may improve the performance of accelerators evidently. As a key factor to determine the principle of acceleration, the longitude dynamics of the accelerators should be studied first. In some aspect, the longitude dynamics of induction synchrotron is similar to a radio-frequency synchrotron, but it has some unique characteristics. In this paper, the longitude dynamics of induction synchrotron is analyzed. The software of ISync, based on multi-particle tracing, is programmed to simulate the longitude dynamics. The simulation results are in accordance with the theoretical analysis. The aberration and oscillation of time spectrum are discovered in the simulation. The origin of the phenomena is analyzed, and ways of suppressing the phenomena are proposed. The work can be of help for future works on induction synchrotron.