【摘要】 空间环境地面模拟装置（Space Environment Simulation and Research Infrastructure,SESRI）为哈尔滨工业大学承建的国家“十二五”重大科技基础设施项目，用于模拟空间辐照环境，研究空间带电粒子对航空航天器件性能的影响效应。1.2 MeV/10 mA电子加速器是SESRI最大的综合辐照试验舱的电子辐照源之一，可提供最高能量与最大流强分别为1.2 MeV与10 mA的电子束。本文基于1.2 MeV电子加速器的总体设计要求，主要介绍扫描系统中扫描磁铁、扫描电源和扫描不均匀度测量装置的研制及实验验证，重点介绍了45°斜入射样品台给扫描不均匀度带来的特殊问题及解决方法。实验结果表明：1.2 MeV电子加速器的扫描面积可达1 000 mm×1 000 mm，扫描不均匀度小于10%，达到了设计指标，从而也验证了技术方案与技术路线的正确性。更多还原

【Abstract】 [Background] The 1.2 MeV/10 mA electron accelerator, as one of electron irradiation sources for comprehensive irradiation test chamber in Space Environment Simulation and Research Infrastructure(SESRI), can provide electron beams on the millimeter scale. However, the electron beam, as the electron irradiation source in space environment ground simulation experiment for aerospace, must be uniformly irradiated on large objects.Therefore, a well-suited irradiated technique is significant. [Purpose] This study aims to obtain beam scanning with less than 10% of inhomogeneity for 0.6 MeV, 1.0 MeV, 1.2 MeV electron beam for SESRI. [Methods] Based on the overall irradiation requirements, a specific beam-scanning system, including the scanning magnet with customized design, digital power supply and a dedicated apparatus for beam uniformity measurement, was developed.Particularly, in order to eliminate the influence of 45° incidence of electron beam upon scanning uniformity, an asymmetric and non-standard triangular waveform for the magnetic field excitation current was employed and implemented. The measurements for the beam non-uniformity were carried out on field experiments. [Results]Experimental results show that the scanning area of this electron accelerator reaches 1 000 mm×1 000 mm, and the scanning nonuniformity is less than 10% for variable beam energy from 0.6 MeV to 1.2 MeV, achieving the design goal and satisfying the irradiation requirements of SESRI. [Conclusions] A specific beam-scanning system developed for SESRI is verified in this study, offering a good reference for any similar beam-scanning scenarios.更多还原