Simulation results for study on pulsed electron lenses for space charge mitigation

Simulation results for beam loss in the FAIR SIS100 synchrotron for a comprehensive study on pulsed electron lenses for space charge mitigation. The affiliated manuscript "Pulsed electron lenses for space charge mitigation" describing the study parameters is published on arxiv.org (https://arxiv.org/abs/2310.02365) and submitted for journal publication. For the "ffsc" files, each file contains the tabulated beam survival rate of 1000 simulated particles for a given bare tune. A file typically gathers results from scanning the betatron tune quadrant 18.5 <= Qx,y <= 19.0 in tune steps of 0.01. Explanation of file names: - "ffsc": using the fixed frozen Gaussian field map model for space charge (as established in https://doi.org/10.1103/PhysRevAccelBeams.25.054402 ); - "nel": number of pulsed electron lenses placed symmetrically in the straight sections of the SIS100 ring; - "alpha": linear compensation degree, alpha=1.0 corresponds to a total electron lens tune implied tune shift equal to the linear rms-equivalent KV space charge tune shift; - "N": intensity in percent units of the FAIR design intensity for Uranium-28+ beams, i.e. N=100 corresponds to the FAIR design intensity; - "2D" or "3D": the 3D results correspond to the full simulation model with (nonlinear) synchrotron motion, the 2D results assume a fixed longitudinal phase-space distribution and only simulate the transverse dynamics (thus, periodic resonance crossing is suppressed by construction).本数据集为用于空间电荷（space charge）缓解脉冲电子透镜综合性研究的FAIR SIS100同步加速器束流损失仿真结果。相关阐述该研究参数的手稿"Pulsed electron lenses for space charge mitigation"已发布于arxiv.org（https://arxiv.org/abs/2310.02365），并已提交至学术期刊待发表。 对于"ffsc"格式文件，每个文件均包含给定裸调谐（bare tune）下1000个仿真粒子的束流存活率制表数据。此类文件通常涵盖对betatron调谐（betatron tune）象限18.5 ≤ Qx,y ≤ 19.0以0.01为调谐步长扫描所得的全部结果。 文件名说明如下： - "ffsc"：采用固定冻结高斯场映射模型处理空间电荷（该模型源自https://doi.org/10.1103/PhysRevAccelBeams.25.054402）； - "nel"：对称布置于SIS100环直线段的脉冲电子透镜数量； - "alpha"：线性补偿度，当alpha=1.0时，电子透镜的总调谐偏移量等于线性均方根等效KV空间电荷（KV space charge）调谐偏移量； - "N"：以FAIR铀-28+离子束设计流强为基准的百分比流强，即N=100对应FAIR设计流强； - "2D"或"3D"：3D结果对应包含（非线性）同步振荡运动（synchrotron motion）的完整仿真模型，2D结果则假设纵向相空间分布固定，仅模拟横向动力学过程（因此按设计会抑制周期性共振穿越）。