Sufficient and necessary conditions of stability in terms of eigenvalues of the transfer matrix are given for the motion of a charged particle in a strong-focusing accelerator.

本文对强聚焦加速器中带电粒子运动的稳定性乃至一般的N维周期性线性系统的稳定性给出用转移矩阵的特征值表示的稳定性充分必要条件。

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A double focusing, non spatial dispersion magnet design has been suggested to substitute the achromatic principle for improving the beam characteristics on target of the medical accelerator.

本文提出以双聚焦、无空间色散的设计原则，来代替常用的全消色差设计原则，使医用电子直线加速器的偏转磁铁能够具有更好的特性。

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Finally, the influence of resonant Self-focusing on particle acceleration in beat wave accelerator also be discussed.

最后还讨论了共振自聚焦对拍频波加速器中粒子加速过程的影响。

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