arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2109.14901physics.acc-ph
收藏

CoSyR:一个用于模拟同步辐射效应的新型束流动力学程序

CoSyR: a novel beam dynamics code for the modeling of synchrotron radiation effects

C. -K. Huang, F. -Y. Li, H. N. Rakotoarivelo, B. Shen, J. Domine, B. Carlsten, G. Dilts, R. Garimella, T. Kwan, R. Robey

摘要:

相对论性带电粒子束与其完整自场相互作用的自洽非线性动力学是高亮度束流加速器设计中的一个基本问题,也是先进加速器发展的基础。特别地,磁色散光束线元件中的同步辐射诱导效应可导致集体光束不稳定性和发射度增长。基于拉格朗日方法,利用麦克斯韦方程组的格林函数,采用波前/小波网格,发展了一种新的束流动力学计算程序。这些领域,然后插入到一个移动的网格动态更新的光束。这种方法允许辐射的共同传播和自洽的相互作用与光束在模拟中大大减少了数值误差。多级并行是这种方法所固有的,并在我们的代码CoSyR中实现,以便在使用MPI,多线程和GPU的现代计算平台上实现非线性束动力学的大规模模拟。CoSyR已被用来评估光束的横向和纵向相干辐射的影响,并调查束流光学的设计提出了缓解光束亮度退化的磁聚束压缩器。在本文中,CoSyR的设计,以及与其他相干同步辐射模型的基准,进行了描述和讨论。

英文摘要:

The self-consistent nonlinear dynamics of a relativistic charged particle beam interacting with its complete self-fields is a fundamental problem underpinning many of the accelerator design issues in high brightness beam applications, as well as the development of advanced accelerators. Particularly, synchrotron radiation induced effects in a magnetic dispersive beamline element can lead to collective beam instabilities and emittance growth. A novel beam dynamic code is developed based on a Lagrangian method for the calculation of the particles' radiation near-fields using wavefront/wavelet meshes via the Green's function of the Maxwell equations. These fields are then interpolated onto a moving mesh for dynamic update of the beam. This method allows radiation co-propagation and self-consistent interaction with the beam in the simulation at greatly reduced numerical errors. Multiple levels of parallelisms are inherent in this method and implemented in our code CoSyR to enable at-scale simulations of nonlinear beam dynamics on modern computing platforms using MPI, multi-threading, and GPUs. CoSyR has been used to evaluate the transverse and longitudinal coherent radiation effects on the beam and to investigate beam optics designs proposed for mitigation of beam brightness degradation in a magnetic bunch compressor. In this paper, the design of CoSyR, as well as the benchmark with other coherent synchrotron radiation models, are described and discussed.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑