强流脉冲束在静电加速管中传输研究及模拟计算

Research and Simulation of Intense Pulsed Beam Transfer in Electrostatic Accelerate Tube

为了研究强流脉冲束流在静电加速管中的传输,采用矩阵法分析了非强流脉冲束流与强流脉冲束流在静电加速管中的传输矩阵,编写了束流在静电加速管等元件中传输的计算程序ACCT。用优化方法实现给定的光学条件,用迭代方法计算强流脉冲束流的空间电荷效应对束流传输的影响以获得自洽解。在不同束流流强条件下,利用ACCT、TRACE-3D和TRANSPORT等程序进行了模拟计算,并对模拟结果进行了比较分析。模拟结果表明,提高加速电压比,可以增强静电加速管的聚焦能力、减少束流损失和提高传输效率。

To study intense pulsed beam transfer in electrostatic accelerate tube,the matrix method was applied to analyze the transport matrixes in electrostatic accelerate tube of non-intense pulsed beam and intense pulsed beam,and a computer code was written for the intense pulsed beam transporting in electrostatic accelerate tube.Optimization techniques were used to attain the given optical conditions and iteration procedures were adopted to compute intense pulsed beam for obtaining self-consistent solutions in this computer code.The calculations were carried out by using ACCT,TRACE-3Dand TRANSPORT for different beam currents,respectively.The simulation results show that improvement of the accelerating voltage ratio can enhance focusing power of electrostatic accelerate tube,reduce beam loss and increase the transferring efficiency.