三圆筒透镜强流脉冲束传输模拟计算

摘要

基于三圆筒透镜的强流脉冲束传输和高斯-赛德尔迭代等理论,编写了三圆筒透镜的束流传输模拟程序TTLS,TTLS适用于强流脉冲束在三圆筒透镜中传输的模拟计算.用模拟程序对不同流强束流在三圆筒透镜中的传输进行模拟计算,并对模拟结果进行了比较分析.模拟结果表明,随着束流流强的增大,空间电荷力增大,空间电荷力对束流包络曲线横向发散作用变显著；束流流强大于100 mA时,束流包络曲线发散比较明显.%Based on the theory of intense pulsed beam transmission in three-tube lenses and Gauss-Seidel iteration, a computer simulation program TTLS was developed to calculate intense pulsed beam transmission in three-tube lenses. TTLS and other programs were used to simulate different current beam transmission in three-tube lenses, and the simulation results were compared and analyzed. The simulation results indicated that space-charge force increased with the rise of beam current, and beam envelope lateral divergence induced space-charge force became more notable. When beam current was larger than 100 mA, beam envelope lateral divergence was obvious.