Self-consistent “start-to-end” simulation for free electron laser
Self-consistent “start-to-end” simulation for free electron laser
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DOI：
10.1016/j.nima.2010.02.062
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发表时间：
2010-04
影响因子：
1.4
通讯作者：
Jun Yan;Meng（张猛） Zhang;H. Deng
中科院分区：
文献类型：
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作者：
Jun Yan;Meng（张猛） Zhang;H. Deng
“始末”模拟广泛应用于自由电子激光(FEL)工程的设计和优化，在自由电子激光物理研究中也起着重要作用。本文提出了一种自洽的“始末”模拟方法，即从光阴极到波动器出口直接跟踪所有的宏观粒子。以ASTRA、ERAYLAY和GENESIS1.3为例说明了仿真原理。给出了自放大自发辐射自由电子激光器低电荷工作模式的数值算例，并对其进行了讨论。结果表明，除了有一些细微的差别外，该方法的计算结果与传统方法的计算结果吻合较好。
“Start-to-end” simulation is widely used in the design and optimization of free electron laser (FEL) projects and it also plays an important role in the investigations of FEL physics. In this paper, a self-consistent “start-to-end” simulation approach is presented, in which all macroparticles are directly tracked from the photocathode to the undulator exit. The simulation principle is illustrated with the well benchmarked codes ASTRA, ELEGANT and GENESIS1.3. A numerical example about the low-charge operation mode of self amplified spontaneous emission (SASE) FEL is given and discussed. It shows that except for some slight differences, the results in the frame of the proposed approach agree well with that in the conventional one.