A Novel Method for Rigorously Analyzing Beam Loading Effect Based on the Macro-Particle Model
A Novel Method for Rigorously Analyzing Beam Loading Effect Based on the Macro-Particle Model
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DOI：
10.1088/0256-307x/31/1/012902
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发表时间：
2014-01
影响因子：
3.5
通讯作者：
Chen Qushan;Pei Yuan-ji;Hu Tongning;Qin Bin
中科院分区：
文献类型：
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作者：
Chen Qushan;Pei Yuan-ji;Hu Tongning;Qin Bin
对于大平均电流梁，梁的加载效应是一个相当重要的问题。本文采用一种新颖的方法，在不使用似是而非的光束电流值的情况下，对s波段线性振荡器中的光束加载效应进行了严格的分析。通过跟踪每个宏观粒子的状态并利用能量守恒定律，计算出光束在每个单元中的耗散功率。在新的基于粒子的算法中，提出了等效光束电流的概念。它的值不是恒定的，通过加速结构有很小的变化。同时，我们引入迭代算法进行比较，发现两种算法吻合得很好。
The beam loading effect is a considerable issue for a high average current beam. We apply a novel method without utilizing the specious beam current value to rigorously analyze the beam loading effect in S-band linacs. By tracking every macro-particle's state and using the energy conservation law, power dissipated from the beam is calculated in each cell. In the new particle-based algorithm, the concept of equivalent beam current is proposed. Its value is not constant and it has a small variation through the accelerating structure. Also, we introduce the iteration algorithm as comparison and we find that the two algorithms coincide with each other very well.