本文提出用闪烁丝测量束流包络，从而求出粒子流真实发散度的方法。
In this paper, we propose to measure the beam envelope by a thin plastic scintillation filament.
利用这些分析表达式，讨论了束流包络极大值和极小值存在的判别条件，导出了计算包络极大值和极小值及其位置的精确公式。
And we have derived the accurate formulae with which one can calculate the maximum and the minimum values of envelop and their position.
通过模拟束流的传输过程，观察空间电荷效应对束流产生的影响，进一步对注入系统的元件参数进行适当的优化，从而对束流包络进行控制。
The infection of the space charge was observed by simulating the transmission of the beams, and the parameters of the system were optimized to control the envelope of the beam.
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