基于李萨如理论的束流均匀性研究  

Study of Beam Uniformity Based on Lisaru Theory

作　　者：覃英参 Qin Yingcan(Guangxi Special Equipment Inspection and Reseach Institute,Nanning,China)

机构地区：[1]广西壮族自治区特种设备检验研究院,广西南宁

出　　处：《科学技术创新》2023年第17期183-187,共5页Scientific and Technological Innovation

摘　　要：针对电子元器件单粒子效应试验对束流均匀性的要求,基于HI-13串列加速器辐照装置开展了一组磁铁进行扫描均匀化束流的研究。通过对李萨茹扫描下束斑中心在靶上形成的运动轨迹的分析,对不同形状及尺寸原始束斑的扫描均匀性进行了微观和宏观计算。结果表明,当原始束斑尺寸较小时,正方形束斑的扫描均匀性最好;当束斑尺寸变大时,微观均匀性也会变好,但由于存在边界问题,束斑不宜过大,否则将导致边界不均匀范围变大即宏观均匀性变差。基于已有的理论分析结果还开展了在束的实验验证,测量结果也表明原始束斑为正方形、尺寸约为2 cm*2 cm时的扫描均匀性最好,这与计算结果一致。即经过扫描均匀化的束流,可以满足单粒子效应地面模拟试验的需求。To satisfy the requirement of beam uniformity in the Single Event Effects ground-testing of electronic devices,a set of magnets was used to scan and homogenize the beam based on the HI-13 tandem accelerator Irradiation Facility.Microscopic and macroscopic calculations were carried out on the uniformity of different shapes and sizes of original beam spots by analyzing the motion trajectories of beam spot centers formed on the target plane after the scanning magnets.The results show that when the original beam spot size is small,the square beam spot has the best uniformity;when it becomes larger,the microscopic uniformity will also be better.But due to the boundary problem,the beam spot should not be too large,otherwise the boundary uneven range becomes large.That is,the macroscopic uniformity will decrease.Based on the theoretical analysis results,the on-line verification experiment was also carried out.The measurement results also showed that when the original beam spot was square and the size was about 2 cm*2 cm,the uniformity was the best,which is consistent with the calculation results.That is,the beam that has been scanned and homogenized by a set of magnets can meet the needs of the Single Event Effects'ground-testing.

关 键 词：单粒子效应 地面模拟试验 束流均匀性 李萨如理论 

分 类 号：O4[理学—物理]