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为 2 0 Me V直线感应加速器建造的 2 Me V注入器经过一年多实验调试 ,束流技术指标已达到能量 2 Me V、束流 3 k A、亮度≥ 1 0 8A/ ( m· rad) 2 。建立了二维数字模型 ,并对注入器的电子发射和束流传输过程进行模拟 ,模拟结果指导了实验调试。分析了有箔二极管中发生的聚焦作用。
After more than a year of experimental commissioning, the 2 MeV injector built for a 2 0 MeV linear accelerator has a beam energy of 2 MeV, a beam current of 3 kA and a brightness of ≥10 8A / (m · rad) 2 . A two-dimensional digital model was established, and the electron emission and beam transmission of the injector were simulated. The simulation results guided the experimental debugging. The focusing effect in the foiled diode is analyzed.